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	diff --git a/config/default.json b/config/default.json
	index f3144c4..db18ff7 100644
	--- a/config/default.json
	+++ b/config/default.json
	@@ -1,37 +1,39 @@
	{
	- "template": "problems",
	+ "template": "containers",

	"templates": {
	- "bugs":"Containers.DONE_ArrayUpdate1",
	+ "bugs":"Compilation.BUG_Minus1",

	"default": "-Colevels.:Interpretation.*",
	"documentation":"Modules.Doc_:Modules_API.Doc_:Interpretation.Doc_:AST.Doc_:Loop.Doc_:LateReasoning.Doc_:Latex.Doc_:Polymorphs.Doc_:Transcend.Doc_:ASTCorrespondence.Doc_:Virtualization.Doc_:Exploitation.Doc_:Communication.Doc_:Introduction.",
	"ast": "AST.*",
	"effects": "Effects.*",
	"basic": "Attachments.*",
	"dimensions": "Dimensions.CompileDeepAnn1",
	- "compilation": "Compilation.*",
	+ "compilation": "Compilation.LLVMAliases",
	"communication": "Communication.*",
	"cfa": "CFA.*",
	- "containers": "Containers.DONE_*",
	+ "containers": "Compilation.Lambda:Compilation.MM:Containers.:Problems.",
	"dfa": "DFA.*",
	"diagnostic": "Diagnostic.*",
	"dsl": "Interpretation.:Association.",
	"exploitation": "Exploitation.*",
	"ExpressionSerializer": "ExpressionSerializer.*",
	"externc": "InterfaceExternC.*",
	"loops": "Loop.*",
	"latereasoning": "LateReasoning.*",
	"latex": "Latex.*",
	+ "lambdas": "AST.Lambda:Compilation.Lambda",
	"modules": "Modules.*",
	"polymorphs": "PDT.BuildDTTable1",
	"problems": "Problems.MinMax1",
	+ "mm": "Compilation.MM*",
	"arithmetics": "Arithmetics.*",
	"intrinsic-query": "Types.SlaveTypes:Association.TypedQuery",
	"types": "Types.*",
	"universal": "Universal.*",
	"virtualization": "Virtualization.*",
	"vendorsAPI/clang": "ClangAPI.*",
	"vendorsAPI/xml2": "libxml2.*"
	}
	}
	diff --git a/cpp/Configurations.cmake b/cpp/Configurations.cmake
	index 2c732b0..65cff38 100644
	--- a/cpp/Configurations.cmake
	+++ b/cpp/Configurations.cmake
	@@ -1,161 +1,164 @@
	cmake_minimum_required(VERSION 2.8.11)

	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -fprofile-arcs -ftest-coverage -O0")


	set(XREATE_DEFINITIONS_COMMON
	-D_GNU_SOURCE
	-D__STDC_CONSTANT_MACROS
	-D__STDC_FORMAT_MACROS
	-D__STDC_LIMIT_MACROS
	-DWITH_THREADS=1
	)
	#------------------------------------------------------
	# CONFIGURATION: Min

	set(XREATE_SOURCE_FILES_MIN
	- compilation/resources.cpp
	- analysis/typeinference.cpp
	- xreatemanager.cpp
	- transcendlayer.cpp
	- llvmlayer.cpp
	- pass/compilepass.cpp
	- analysis/utils.cpp
	- ast.cpp
	- aux/xreatemanager-decorators.cpp
	- compilation/transformations.cpp
	- compilation/transformersaturation.cpp
	- attachments.cpp
	- compilation/control.cpp
	- utils.cpp
	- pass/abstractpass.cpp
	- aux/serialization/expressionserializer.cpp
	- analysis/transcendtarget.cpp analysis/resources.cpp
	- query/containers.cpp
	- modules.cpp
	- compilation/containers.cpp
	- compilation/containers/arrays.cpp
	- aux/kludges.cpp
	+ compilation/resources.cpp
	+ analysis/typeinference.cpp
	+ xreatemanager.cpp
	+ transcendlayer.cpp
	+ llvmlayer.cpp
	+ pass/compilepass.cpp
	+ analysis/utils.cpp
	+ ast.cpp
	+ aux/xreatemanager-decorators.cpp
	+ compilation/transformations.cpp
	+ compilation/transformersaturation.cpp
	+ attachments.cpp
	+ compilation/control.cpp
	+ utils.cpp
	+ pass/abstractpass.cpp
	+ aux/serialization/expressionserializer.cpp
	+ analysis/transcendtarget.cpp analysis/resources.cpp
	+ query/containers.cpp
	+ modules.cpp
	+ compilation/containers.cpp
	+ compilation/containers/arrays.cpp
	+ aux/kludges.cpp
	)

	set(XREATE_TEST_FILES_MIN
	universal.cpp
	introduction.cpp
	unit-test-example.cpp
	supplemental/docutils
	transcend.cpp
	association.cpp
	main.cpp
	attachments.cpp
	ast.cpp
	compilation.cpp
	ExpressionSerializer.cpp
	types.cpp
	#vendorsAPI/clangAPI.cpp
	#vendorsAPI/xml2.cpp
	#vendorsAPI/json.cpp
	loops.cpp
	#supplemental/versions-algorithm-data_dependency.cpp
	supplemental/basics.cpp
	arithmetics.cpp
	)

	IF(XREATE_CONFIG STREQUAL "Min")
	set(XREATE_SOURCE_FILES
	${XREATE_SOURCE_FILES_MIN}
	)

	set(XREATE_TEST_FILES ${XREATE_TEST_FILES_MIN})

	set(XREATE_DEFINITIONS ${XREATE_DEFINITIONS_COMMON}
	-DXREATE_CONFIG_MIN
	)
	ENDIF()

	#------------------------------------------------------
	# CONFIGURATION: Default

	set(XREATE_SOURCE_FILES_DEFAULT ${XREATE_SOURCE_FILES_MIN}
	compilation/targetinterpretation.cpp
	analysis/temporalseqgraph.cpp
	pass/cfatemporalseqpass.cpp
	analysis/cfagraph.cpp
	pass/cfapass.cpp
	compilation/interpretation-instructions.cpp
	ExternLayer.cpp
	analysis/cfagraph.cpp
	compilation/latetranscend.cpp
	query/latex.cpp
	aux/latereasoning.cpp
	analysis/dfagraph.cpp
	pass/dfapass.cpp
	pass/interpretationpass.cpp
	pass/versionspass.cpp
	contextrule.cpp
	compilation/demand.cpp
	analysis/predefinedanns.cpp
	)

	set(XREATE_TEST_FILES_DEFAULT ${XREATE_TEST_FILES_MIN}
	interpretation.cpp
	transcend-ast.cpp
	cfa.cpp
	latetranscend.cpp
	latex.cpp
	polymorph.cpp
	virtualization.cpp
	exploitation.cpp
	effects-communication.cpp
	modules.cpp
	dfa.cpp
	effects-versions.cpp
	containers.cpp
	externc.cpp
	aux/expressions.cpp
	polymorphism-dt.cpp
	)

	IF(XREATE_CONFIG STREQUAL "Default")
	set(XREATE_SOURCE_FILES
	${XREATE_SOURCE_FILES_DEFAULT}
	)

	set(XREATE_TEST_FILES ${XREATE_TEST_FILES_DEFAULT})

	set(XREATE_DEFINITIONS ${XREATE_DEFINITIONS_COMMON}
	XREATE_ENABLE_EXTERN
	)
	ENDIF()

	#------------------------------------------------------
	# CONFIGURATION: Dimensions

	IF(XREATE_CONFIG STREQUAL "Dimensions")
	set(XREATE_SOURCE_FILES ${XREATE_SOURCE_FILES_MIN}
	+ query/contextalloc.cpp
	+ compilation/context.cpp
	compilation/lambdas.cpp
	query/demand.cpp
	compilation/demand.cpp
	query/polymorph.cpp
	compilation/polymorph.cpp
	aux/expressions.cpp
	pass/interpretationpass.cpp
	compilation/targetinterpretation.cpp
	compilation/intrinsics.cpp
	# compilation/containerinst.cpp
	analysis/predefinedanns.cpp
	analysis/typehints.cpp
	+ compilation/mm.cpp
	)

	set(XREATE_TEST_FILES ${XREATE_TEST_FILES_MIN}
	interpretation.cpp
	dimensions.cpp
	polymorph.cpp
	polymorphism-dt.cpp
	containers.cpp
	problems.cpp
	)

	set(XREATE_DEFINITIONS ${XREATE_DEFINITIONS_COMMON}
	-DXREATE_CONFIG_MIN
	)
	ENDIF()
	diff --git a/cpp/src/analysis/predefinedanns.cpp b/cpp/src/analysis/predefinedanns.cpp
	index 807a633..fdcc9fa 100644
	--- a/cpp/src/analysis/predefinedanns.cpp
	+++ b/cpp/src/analysis/predefinedanns.cpp
	@@ -1,88 +1,102 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: predefinedanns.cpp
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on 19/03/2020
	*/

	#include "analysis/predefinedanns.h"
	#include "analysis/resources.h"

	namespace xreate{ namespace analysis{

	PredefinedAnns
	PredefinedAnns::__instance = PredefinedAnns();

	PredefinedAnns::PredefinedAnns(){
	fnAnnsT = TypeAnnotation(TypeOperator::VARIANT, {});
	exprAnnsT = TypeAnnotation(TypeOperator::VARIANT, {});

	//Function annotations
	- fnAnnsT.__operands.push_back(TypePrimitive::Invalid);
	fnAnnsT.fields.push_back(FN_ENTRY_PREDICATE);
	fnAnnsT.__operands.push_back(TypePrimitive::Invalid);
	+
	fnAnnsT.fields.push_back(FN_EXTERIOR_PREDICATE);
	+ fnAnnsT.__operands.push_back(TypePrimitive::Invalid);
	+
	+ fnAnnsT.fields.push_back(FN_ALLOCAPAD_P);
	+ fnAnnsT.__operands.push_back(TypePrimitive::Invalid);

	//interpretation
	i12nModeT = TypeAnnotation(TypeOperator::VARIANT, {
	TypePrimitive::Invalid,
	TypePrimitive::Invalid
	});
	i12nModeT.fields.push_back("on");
	i12nModeT.fields.push_back("off");

	exprAnnsT.__operands.push_back(i12nModeT);
	exprAnnsT.fields.push_back("i12n");

	//Int
	hintsIntT = TypeAnnotation(TypeOperator::VARIANT, {
	TypePrimitive ::Int
	});
	hintsIntT.fields.push_back("size");

	//Containers
	hintsContT = TypeAnnotation(TypeOperator::VARIANT, {
	TypePrimitive::Int,
	TypeAnnotation(TypeOperator::REF, {TypeAnnotation::alias("hintsContT")}),
	TypePrimitive ::Invalid
	});
	hintsContT.fields.push_back(CONTAINERS_IMPL_ARRAY_PREDICATE);
	hintsContT.fields.push_back(CONTAINERS_IMPL_FLY_PREDICATE);
	hintsContT.fields.push_back(CONTAINERS_IMPL_RANGE_PREDICATE);
	+
	+ allocaT = TypeAnnotation(TypeOperator::VARIANT, {
	+ TypePrimitive ::String
	+ });
	+ allocaT.fields.push_back(VAR_ALLOCA_P);
	}

	void
	PredefinedAnns::registerVariants(std::map<std::string, std::pair<TypeAnnotation, int>> &__registry) const{
	//annotation; type; variant id;
	__registry = {
	+
	//Functions:
	{FN_ENTRY_PREDICATE, {fnAnnsT, (unsigned) FnAnnotations::ENTRY}},
	{FN_EXTERIOR_PREDICATE, {fnAnnsT, (unsigned) FnAnnotations::EXTERIOR}},
	+ {FN_ALLOCAPAD_P, {fnAnnsT, (unsigned) FnAnnotations::ALLOCAPAD}},

	//Expressions:
	{"i12n", {exprAnnsT, (unsigned) ExprAnnotations::I12N}},

	//Interpretation:
	{"on", {i12nModeT, (unsigned) I12ModeTag::ON}},
	{"off", {i12nModeT, (unsigned) I12ModeTag::OFF}},

	//Int:
	{"size", {hintsIntT, (unsigned) IntHints::SIZE}},

	//Containers
	{CONTAINERS_IMPL_ARRAY_PREDICATE, {hintsContT, (unsigned) ContHints::ARRAY}},
	{CONTAINERS_IMPL_FLY_PREDICATE, {hintsContT, (unsigned) ContHints::FLY}},
	{CONTAINERS_IMPL_RANGE_PREDICATE, {hintsContT, (unsigned) ContHints::RANGE}},
	+
	+ //Alloca:
	+ {VAR_ALLOCA_P, {allocaT, (unsigned) AllocaAnns::ALLOCA}},
	};
	}

	void
	PredefinedAnns::registerAliases(std::map<std::string, TypeAnnotation> &__registry) const{
	__registry = {
	{"hintsContT", hintsContT}
	};
	}
	}}
	\ No newline at end of file
	diff --git a/cpp/src/analysis/predefinedanns.h b/cpp/src/analysis/predefinedanns.h
	index 2cbad67..56f0865 100644
	--- a/cpp/src/analysis/predefinedanns.h
	+++ b/cpp/src/analysis/predefinedanns.h
	@@ -1,55 +1,60 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: predefinedanns.h
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on 19/03/2020
	*/

	#ifndef XREATE_PREDEFINEDANNS_H
	#define XREATE_PREDEFINEDANNS_H

	#include "ast.h"

	namespace xreate{ namespace analysis{
	class PredefinedAnns{
	public:
	enum class FnAnnotations{
	- ENTRY, EXTERIOR
	+ ENTRY, EXTERIOR, ALLOCAPAD
	};
	enum class ExprAnnotations{
	I12N
	};
	enum class I12ModeTag{
	ON, OFF
	};
	enum class IntHints{
	SIZE
	};

	+ enum class AllocaAnns{
	+ ALLOCA
	+ };
	+
	enum class ContHints{
	ARRAY, FLY, RANGE
	};

	TypeAnnotation fnAnnsT;
	TypeAnnotation exprAnnsT;
	+ TypeAnnotation allocaT;
	TypeAnnotation hintsIntT;
	TypeAnnotation hintsContT;

	//Interpretation
	TypeAnnotation i12nModeT;

	PredefinedAnns();
	static const PredefinedAnns& instance(){ return __instance; }
	void registerVariants(std::map<std::string, std::pair<TypeAnnotation, int>> &__registry) const;
	void registerAliases(std::map<std::string, TypeAnnotation>& __registry) const;

	private:
	static PredefinedAnns __instance;
	};

	}} // end of xreate::analysis

	#endif //XREATE_PREDEFINEDANNS_H
	diff --git a/cpp/src/analysis/resources.cpp b/cpp/src/analysis/resources.cpp
	index 69c22cd..c328d10 100644
	--- a/cpp/src/analysis/resources.cpp
	+++ b/cpp/src/analysis/resources.cpp
	@@ -1,27 +1,30 @@
	#include "analysis/resources.h"
	namespace xreate{namespace analysis{

	const char *VAR_ANN_PREDICATE_TPL = "bind(%1%, %2%)";
	const char *VAR_ANN_PREDICATE = "bind";
	const char *SCOPE_ANN_PREDICATE_TPL = "bind_scope(%1%, %2%)";
	const char *SCOPE_ANN_PREDICATE = "bind_scope";
	const char *FUNCTION_ANN_PREDICATE_TPL = "bind_func(\"%1%\", %2%)";
	const char *FUNCTION_ANN_PREDICATE = "bind_func";

	const char *TRANSCEND_PASS_SECTION = "% == STATIC ANALYSIS: ANNOTATIONS ==";
	const char *FUNCTION_PREDICATE_TPL = "function(\"%1%\")";
	const char *SITE_SYMBOL_PREDICATE = "s";
	const char *SITE_ANON_PREDICATE = "a";
	const char *DEMAND_FORMAL_PREDICATE = "func_demand";
	const char *DEMAND_ACTUAL_PREDICATE = "func_supply";
	const char *FN_ENTRY_PREDICATE = "entry";
	const char *FN_EXTERIOR_PREDICATE = "exterior";
	const char *POLYMORPH_SUPPLY_PREDICATE = "func_supply_guard";

	-extern const char *CONTAINERS_IMPL_ARRAY_PREDICATE = "csize";
	-extern const char *CONTAINERS_IMPL_FLY_PREDICATE = "fly";
	-extern const char *CONTAINERS_IMPL_RANGE_PREDICATE = "range";
	+const char *CONTAINERS_IMPL_ARRAY_PREDICATE = "csize";
	+const char *CONTAINERS_IMPL_FLY_PREDICATE = "fly";
	+const char *CONTAINERS_IMPL_RANGE_PREDICATE = "range";

	const char *CONTAINERS_ID_IMPL_PREDICATE = "containers_impl";
	const char *CONTAINERS_ID_LINKLIST_PREDICATE = "linkedlist";
	+
	+const char *VAR_ALLOCA_P = "alloca";
	+const char *FN_ALLOCAPAD_P = "allocapad";
	}}
	\ No newline at end of file
	diff --git a/cpp/src/analysis/resources.h b/cpp/src/analysis/resources.h
	index 3d4a9df..6335f8a 100644
	--- a/cpp/src/analysis/resources.h
	+++ b/cpp/src/analysis/resources.h
	@@ -1,40 +1,44 @@
	//
	// Created by pgess on 15/01/2020.
	//
	-#ifndef XREATE_RESOURCES_H
	-#define XREATE_RESOURCES_H
	+
	#include "transcendlayer.h"
	-#include <tuple>
	#include <string>
	+#include <tuple>
	+
	+#ifndef XREATE_ANALYSIS_RESOURCES_H
	+#define XREATE_ANALYSIS_RESOURCES_H

	namespace xreate{namespace analysis {
	extern const char *FUNCTION_PREDICATE_TPL;
	extern const char *FUNCTION_ANN_PREDICATE_TPL;
	extern const char *FUNCTION_ANN_PREDICATE;
	extern const char *SCOPE_ANN_PREDICATE_TPL;
	extern const char *SCOPE_ANN_PREDICATE;
	extern const char *VAR_ANN_PREDICATE_TPL;
	extern const char *VAR_ANN_PREDICATE;
	extern const char *TRANSCEND_PASS_SECTION;
	extern const char *SITE_SYMBOL_PREDICATE;
	extern const char *SITE_ANON_PREDICATE;
	extern const char *DEMAND_FORMAL_PREDICATE;
	extern const char *DEMAND_ACTUAL_PREDICATE;
	extern const char *POLYMORPH_SUPPLY_PREDICATE;
	extern const char *FN_ENTRY_PREDICATE;
	extern const char *FN_EXTERIOR_PREDICATE;
	-
	extern const char *CONTAINERS_IMPL_ARRAY_PREDICATE;
	extern const char *CONTAINERS_IMPL_FLY_PREDICATE;
	extern const char *CONTAINERS_IMPL_RANGE_PREDICATE;
	+extern const char *VAR_ALLOCA_P;
	+extern const char *FN_ALLOCAPAD_P;

	extern const char *CONTAINERS_ID_IMPL_PREDICATE;
	extern const char *CONTAINERS_ID_LINKLIST_PREDICATE;

	typedef std::tuple<std::string, std::string, std::string> DEMAND_FORMAL_SCHEME; //fn, key, type-alias
	typedef std::tuple<xreate::ASTSitePacked, std::string, Gringo::Symbol> DEMAND_ACTUAL_SCHEME; //fn, key, type-alias
	typedef std::tuple<xreate::ASTSitePacked, Gringo::Symbol, std::string> POLYMORPH_SUPPLY_SCHEME; //site, data, type-variant
	-
	+typedef std::tuple<std::string> FN_ALLOCAPAD_SCHEME;
	+typedef std::tuple<std::string> VAR_ALLOCA_SCHEME;
	}}

	#endif //XREATE_RESOURCES_H
	diff --git a/cpp/src/analysis/typehints.cpp b/cpp/src/analysis/typehints.cpp
	index 3bba26d..d0a31ff 100644
	--- a/cpp/src/analysis/typehints.cpp
	+++ b/cpp/src/analysis/typehints.cpp
	@@ -1,74 +1,88 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: typehints.cpp
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on 24/03/2020
	*/

	#include "analysis/typehints.h"
	#include "analysis/predefinedanns.h"
	#include "analysis/utils.h"
	#include "aux/expressions.h"

	namespace xreate{namespace typehints{

	namespace impl {
	template<class Hint>
	inline Hint getHint(const Expression& e, const Hint& def, unsigned annId, const ExpandedType& hintT){
	const std::list<Expression>& hintsL = getAnnotations(e);
	auto predefined = analysis::PredefinedAnns::instance();
	const Expression& hintActual = analysis::findAnnById(annId, hintT, hintsL);
	if (!hintActual.isValid()){
	return def;
	}

	return parse<Hint>(hintActual);
	}
	}

	template<> IntBits
	parse(const Expression& e){
	return {(unsigned) e.operands.at(0).getValueDouble()};
	}

	template<> ArrayHint
	parse(const Expression& e){
	return {(unsigned) e.operands.at(0).getValueDouble()};
	}

	template<> FlyHint
	parse(const Expression& e){
	return {e.operands.at(0)};
	}

	+template<> ContextAllocHint
	+parse(const Expression& e){
	+ return {e.operands.at(0).getValueString()};
	+}
	+
	template<> IntBits
	find(const Expression& e, const IntBits& def){
	auto predefined = analysis::PredefinedAnns::instance();
	return impl::getHint<IntBits>(e, def,
	(unsigned) analysis::PredefinedAnns::IntHints::SIZE,
	ExpandedType(predefined.hintsIntT)
	);
	}

	template<> ArrayHint
	find(const Expression& e, const ArrayHint& def){
	auto predefined = analysis::PredefinedAnns::instance();
	return impl::getHint<ArrayHint>(e, def,
	(unsigned) analysis::PredefinedAnns::ContHints::ARRAY,
	ExpandedType(predefined.hintsContT)
	);
	}

	template<> FlyHint
	find(const Expression& e, const FlyHint& def){
	auto predefined = analysis::PredefinedAnns::instance();

	return impl::getHint<FlyHint>(e, def,
	(unsigned) analysis::PredefinedAnns::ContHints::FLY,
	ExpandedType(predefined.hintsContT));
	}

	+template<> ContextAllocHint
	+find(const Expression& e, const ContextAllocHint& def){
	+ auto predefined = analysis::PredefinedAnns::instance();
	+
	+ return impl::getHint<ContextAllocHint>(e, def,
	+ (unsigned) analysis::PredefinedAnns::AllocaAnns::ALLOCA,
	+ ExpandedType(predefined.allocaT));
	+}
	+
	}}
	\ No newline at end of file
	diff --git a/cpp/src/analysis/typehints.h b/cpp/src/analysis/typehints.h
	index 33a7880..2b5a15c 100644
	--- a/cpp/src/analysis/typehints.h
	+++ b/cpp/src/analysis/typehints.h
	@@ -1,53 +1,61 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* typehints.h
	*
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	/**
	* \file typehints.h
	* \brief Type inference hints
	*/
	#ifndef XREATE_TYPEHINTS_H
	#define XREATE_TYPEHINTS_H

	#include "ast.h"

	namespace xreate{namespace typehints{

	struct IntBits{
	unsigned int size;
	};

	struct ArrayHint{
	size_t size;
	};

	struct FlyHint{
	Expression hintSrc;
	};

	+struct ContextAllocHint{
	+ std::string pad;
	+};
	+
	template<class Typ>
	Typ find(const Expression& e, const Typ& def);

	template<>
	IntBits find(const Expression& e, const IntBits& def);

	template<>
	ArrayHint find(const Expression& e, const ArrayHint& def);

	+template<>
	+ContextAllocHint find(const Expression& e, const ContextAllocHint& def);
	+
	template<>
	FlyHint find(const Expression& e, const FlyHint& def);

	template<class Typ>
	Typ parse(const Expression& e);

	template<> IntBits parse(const Expression& e);
	template<> ArrayHint parse(const Expression& e);
	+template<> ContextAllocHint parse(const Expression& e);

	}}

	#endif //XREATE_TYPEHINTS_H
	diff --git a/cpp/src/ast.cpp b/cpp/src/ast.cpp
	index f313cff..4c25f9e 100644
	--- a/cpp/src/ast.cpp
	+++ b/cpp/src/ast.cpp
	@@ -1,973 +1,973 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* File: ast.cpp
	*/

	#include "ast.h"
	#include "analysis/typeinference.h"
	#include "analysis/predefinedanns.h"

	#ifdef XREATE_ENABLE_EXTERN
	#include "ExternLayer.h"
	#endif

	#include <stdexcept>
	#include <iostream>

	//TODO BDecl. forbid multiple body declaration (ExprTyped)

	namespace std {

	std::size_t
	hash<xreate::ScopedSymbol>::operator()(xreate::ScopedSymbol const& s) const {
	return s.id ^ (s.version << 2);
	}

	bool
	equal_to<xreate::ScopedSymbol>::operator()(const xreate::ScopedSymbol& __x, const xreate::ScopedSymbol& __y) const {
	return __x.id == __y.id && __x.version == __y.version;
	}

	size_t
	hash<xreate::Symbol>::operator()(xreate::Symbol const& s) const {
	return hash<xreate::ScopedSymbol>()(s.identifier) ^ ((long int) s.scope << 1);
	}

	bool
	equal_to<xreate::Symbol>::operator()(const xreate::Symbol& __x, const xreate::Symbol& __y) const {
	return __x == __y;
	};
	}

	using namespace std;

	namespace xreate {

	Atom<Identifier_t>::Atom(const std::wstring& value) {
	__value = wstring_to_utf8(value);
	}

	Atom<Identifier_t>::Atom(std::string && name) : __value(name) {
	}

	const std::string&
	Atom<Identifier_t>::get() const {
	return __value;
	}

	Atom<Number_t>::Atom(wchar_t* value) {
	//DEBT reconsider number literal recognition
	__value = wcstol(value, 0, 10);
	}

	Atom<Number_t>::Atom(int value)
	: __value(value) {
	}

	double
	Atom<Number_t>::get()const {
	return __value;
	}

	Atom<String_t>::Atom(const std::wstring& value) {
	assert(value.size() >= 2);
	__value = wstring_to_utf8(value.substr(1, value.size() - 2));
	}

	Atom<String_t>::Atom(std::string && name) : __value(name) {}

	const std::string&
	Atom<String_t>::get() const {
	return __value;
	}

	/** \brief xreate::Expression static information*/
	class ExpressionHints {
	public:

	static bool
	isStringValueValid(const Expression& e) {
	switch (e.__state) {
	case Expression::INVALID:
	assert(false);

	case Expression::IDENT:
	case Expression::STRING:
	return true;

	case Expression::NUMBER:
	case Expression::BINDING:
	return false;

	case Expression::COMPOUND:
	{
	switch (e.op) {
	case Operator::CALL:
	return true;

	default: return false;
	}
	}
	}

	return false;
	}

	static bool
	isDoubleValueValid(const Expression& e) {
	switch (e.__state) {
	case Expression::NUMBER:
	return true;

	case Expression::INVALID:
	assert(false);

	case Expression::IDENT:
	case Expression::STRING:
	case Expression::BINDING:
	return false;

	case Expression::COMPOUND: {
	switch (e.op) {
	case Operator::VARIANT:
	return true;
	default: return false;
	}
	}
	}

	return false;
	}
	};

	class TypeResolver {
	public:
	TypeResolver(const AST* ast,
	TypeResolver * parent,
	std::set<std::string> trace,
	const std::map<std::string, TypeAnnotation>& scope = std::map<std::string, TypeAnnotation>())
	: __ast(ast), __scope(scope), __trace(trace), __parent(parent) {}

	ExpandedType
	operator()(const TypeAnnotation &t, const std::vector<TypeAnnotation> &args = std::vector<TypeAnnotation>()) {
	assert(args.size() == t.bindings.size()); // invalid number of arguments
	for (size_t i = 0; i < args.size(); ++i) {
	__scope[t.bindings.at(i)] = args.at(i);
	}

	switch (t.__operator) {
	case TypeOperator::ARRAY:{
	assert(t.__operands.size() == 1);

	Expanded<TypeAnnotation> elTy = this->operator()(t.__operands.at(0));
	return ExpandedType(TypeAnnotation(TypeOperator::ARRAY, {elTy.get()}));
	}

	case TypeOperator::RECORD:
	{
	std::vector<TypeAnnotation>&& packOperands = expandOperands(t.__operands);
	auto typNew = TypeAnnotation(TypeOperator::RECORD, move(packOperands));
	typNew.fields = t.fields;

	return ExpandedType(move(typNew));
	};

	case TypeOperator::VARIANT:
	{
	std::vector<TypeAnnotation>&& packOperands = expandOperands(t.__operands);
	auto typNew = TypeAnnotation(TypeOperator::VARIANT, move(packOperands));
	typNew.fields = t.fields;

	return ExpandedType(move(typNew));
	};

	case TypeOperator::ALIAS: {
	std::string alias = t.__valueCustom;
	if (__trace.count(alias)){
	assert(false && "Recursive Type");
	return ExpandedType(TypeAnnotation());
	}

	const TypeAnnotation& tyAlias = findType(alias);
	std::vector<TypeAnnotation>&& operands = expandOperands(t.__operands);
	auto traceNew =__trace;
	traceNew.insert(alias);
	return TypeResolver(__ast, this, traceNew, __scope)(tyAlias, operands);
	};

	case TypeOperator::ACCESS:
	{
	std::string alias = t.__valueCustom;
	const TypeAnnotation& ty = findType(alias);
	TypeAnnotation tyAggr = this->operator()(ty).get();

	for (const string& field : t.fields) {
	auto fieldIt = std::find(tyAggr.fields.begin(), tyAggr.fields.end(), field);
	assert(fieldIt != tyAggr.fields.end() && "unknown field");

	int fieldId = fieldIt - tyAggr.fields.begin();
	tyAggr = tyAggr.__operands.at(fieldId);
	}

	return ExpandedType(tyAggr);
	}

	case TypeOperator::NONE:
	case TypeOperator::VOID:
	case TypeOperator::SLAVE:
	case TypeOperator::REF: {
	return ExpandedType(t);
	}

	default:
	assert(false);
	}

	assert(false);
	return ExpandedType(TypeAnnotation());
	}

	private:
	const AST* __ast;
	std::map<std::string, TypeAnnotation> __scope;
	std::set<std::string> __trace;
	TypeResolver* __parent;

	std::vector<TypeAnnotation>
	expandOperands(const std::vector<TypeAnnotation>& operands) {
	std::vector<TypeAnnotation> pack;

	pack.reserve(operands.size());
	std::transform(operands.begin(), operands.end(), std::inserter(pack, pack.end()),
	[this](const TypeAnnotation & t) {
	return this->operator()(t).get();
	});
	return pack;
	}

	TypeAnnotation findType(const std::string& alias){
	if (__scope.count(alias)) {
	return __scope.at(alias);

	} else if (__parent){
	return __parent->findType(alias);

	} else if (__ast->__registryTypes.count(alias)){
	return __ast->__registryTypes.at(alias);
	}

	assert(false && "Undefined or external type");
	return TypeAnnotation();
	}
	};

	TypeAnnotation::TypeAnnotation()
	: __operator(TypeOperator::NONE), __value(TypePrimitive::Invalid) {
	}

	TypeAnnotation::TypeAnnotation(TypePrimitive typ)
	: __value(typ)
	{}

	TypeAnnotation::TypeAnnotation(TypeOperator op, std::initializer_list<TypeAnnotation> operands)
	: __operator(op), __operands(operands) {

	}

	TypeAnnotation::TypeAnnotation(TypeOperator op, std::vector<TypeAnnotation>&& operands)
	: __operator(op), __operands(operands) {
	}

	bool
	TypeAnnotation::isValid() const {
	return !(__value == TypePrimitive::Invalid && __operator == TypeOperator::NONE);
	}

	bool
	TypeAnnotation::operator<(const TypeAnnotation& t) const {
	if (__operator != t.__operator) return __operator < t.__operator;

	if (__operator == TypeOperator::NONE)
	return __value < t.__value;

	if (__operator == TypeOperator::ALIAS \|\| __operator == TypeOperator::ACCESS) {
	if (__valueCustom != t.__valueCustom)
	return __valueCustom < t.__valueCustom;
	}

	return __operands < t.__operands;
	}

	TypeAnnotation
	TypeAnnotation::alias(const std::string& alias) {
	TypeAnnotation aliasT(TypeOperator::ALIAS, {});
	aliasT.__valueCustom = alias;

	return aliasT;
	}

	void
	TypeAnnotation::addBindings(std::vector<Atom<Identifier_t>>&& params) {
	bindings.reserve(bindings.size() + params.size());

	std::transform(params.begin(), params.end(), std::inserter(bindings, bindings.end()),
	[](const Atom<Identifier_t>& ident) {
	return ident.get(); });
	}

	void
	TypeAnnotation::addFields(std::vector<Atom<Identifier_t>>&& listFields) {
	fields.reserve(fields.size() + listFields.size());

	std::transform(listFields.begin(), listFields.end(), std::inserter(fields, fields.end()),
	[](const Atom<Identifier_t>& ident) {
	return ident.get(); });
	}

	unsigned int Expression::nextVacantId = 0;

	Expression::Expression(const Atom<Number_t>& number)
	: Expression() {
	__state = NUMBER;
	op = Operator::INVALID;
	__valueD = number.get();
	}

	Expression::Expression(const Atom<String_t>& a)
	: Expression() {
	__state = STRING;
	op = Operator::INVALID;
	__valueS = a.get();
	}

	Expression::Expression(const Atom<Identifier_t> &ident)
	: Expression() {
	__state = IDENT;
	op = Operator::INVALID;
	__valueS = ident.get();
	}

	Expression::Expression(const Operator &oprt, std::initializer_list<Expression> params)
	: Expression() {
	__state = COMPOUND;
	op = oprt;

	if (op == Operator::CALL) {
	assert(params.size() > 0);
	Expression arg = *params.begin();

	assert(arg.__state == Expression::IDENT);
	__valueS = std::move(arg.__valueS);

	operands.insert(operands.end(), params.begin() + 1, params.end());
	return;
	}

	operands.insert(operands.end(), params.begin(), params.end());
	}

	void
	Expression::setOp(Operator oprt) {
	op = oprt;

	switch (op) {
	case Operator::INVALID:
	__state = INVALID;
	break;

	default:
	__state = COMPOUND;
	break;
	}
	}

	void
	Expression::addArg(Expression &&arg) {
	operands.push_back(arg);
	}

	void
	Expression::addTags(const std::list<Expression> tags) const {
	std::transform(tags.begin(), tags.end(), std::inserter(this->tags, this->tags.end()),
	[](const Expression & tag) {
	return make_pair(tag.getValueString(), tag);
	});
	}

	void
	Expression::addBindings(std::initializer_list<Atom<Identifier_t>> params) {
	addBindings(params.begin(), params.end());
	}

	void
	Expression::bindType(TypeAnnotation t) {
	type = move(t);
	}

	void
	Expression::addBlock(ManagedScpPtr scope) {
	blocks.push_back(scope.operator->());
	}

	const std::vector<Expression>&
	Expression::getOperands() const {
	return operands;
	}

	double
	Expression::getValueDouble() const {
	return __valueD;
	}

	const std::string&
	Expression::getValueString() const {
	return __valueS;
	}

	void
	Expression::setValue(const Atom<Identifier_t>&& v) {
	__valueS = v.get();
	}

	void Expression::setValueDouble(double value) {
	__valueD = value;
	}

	bool
	Expression::isValid() const {
	return (__state != INVALID);
	}

	bool
	Expression::isDefined() const {
	return (__state != BINDING && __state != INVALID);
	}

	Expression::Expression()
	: __state(INVALID), op(Operator::INVALID), id(nextVacantId++) {
	}

	namespace details { namespace inconsistent {

	std::map<std::string, IntrinsicFn>
	AST::__registryIntrinsics = {};

	AST::AST() {
	Attachments::init<versions::VariableVersion>();
	Attachments::init<IdentifierSymbol>();
	Attachments::init<ExprAlias_A>();
	Attachments::init<TypeInferred>();
	Attachments::init<ExprId_A>();

	initIntrinsics();
	analysis::PredefinedAnns man = analysis::PredefinedAnns::instance();
	man.registerVariants(__registryVariants);
	man.registerAliases(__registryTypes);
	}

	void
	AST::addInterfaceData(const ASTInterface& interface, Expression&& data) {
	__interfacesData.emplace(interface, move(data));
	}

	void
	AST::addDFAData(Expression &&data) {
	__dfadata.push_back(data);
	}

	void
	AST::addExternData(ExternData &&entry) {
	//__externdata.push_back(entry);
	}

	void
	AST::add(Function* f) {
	__functions.push_back(f);
	__dictFunctions.emplace(f->getName(), __functions.size() - 1);
	}

	void
	AST::add(MetaRuleAbstract *r) {
	__rules.push_back(r);
	}

	void
	AST::add(TypeAnnotation t, Atom<Identifier_t> alias) {
	if (t.__operator == TypeOperator::VARIANT) {
	for (int i = 0, size = t.fields.size(); i < size; ++i) {
	__registryVariants.emplace(t.fields[i], make_pair(t, i));
	}
	}

	__registryTypes.emplace(alias.get(), move(t));
	}

	ManagedScpPtr
	AST::add(CodeScope* scope) {
	this->__scopes.push_back(scope);
	return ManagedScpPtr(this->__scopes.size() - 1, &this->__scopes);
	}

	std::string
	AST::getModuleName() {
	const std::string name = "main";

	return name;
	}

	ManagedPtr<Function>
	AST::findFunction(const std::string& name) {
	int count = __dictFunctions.count(name);
	if (!count) {
	return ManagedFnPtr::Invalid();
	}

	assert(count == 1);

	auto range = __dictFunctions.equal_range(name);
	return ManagedPtr<Function>(range.first->second, &this->__functions);
	}

	std::list<ManagedFnPtr>
	AST::getAllFunctions() const {
	const size_t size = __functions.size();

	std::list<ManagedFnPtr> result;
	for (size_t i = 0; i < size; ++i) {
	result.push_back(ManagedFnPtr(i, &this->__functions));
	}

	return result;
	}

	//TASK select default specializations
	std::list<ManagedFnPtr>
	AST::getFnSpecializations(const std::string& fnName) const {
	auto functions = __dictFunctions.equal_range(fnName);

	std::list<ManagedFnPtr> result;
	std::transform(functions.first, functions.second, inserter(result, result.end()),
	[this](auto f) {
	return ManagedFnPtr(f.second, &this->__functions);
	});

	return result;
	}

	template<>
	ManagedPtr<Function>
	AST::begin<Function>() {
	return ManagedPtr<Function>(0, &this->__functions);
	}

	template<>
	ManagedPtr<CodeScope>
	AST::begin<CodeScope>() {
	return ManagedPtr<CodeScope>(0, &this->__scopes);
	}

	template<>
	ManagedPtr<MetaRuleAbstract>
	AST::begin<MetaRuleAbstract>() {
	return ManagedPtr<MetaRuleAbstract>(0, &this->__rules);
	}

	void
	AST::recognizeIntrinsic(Expression& fn) const {
	assert(fn.op == Operator::CALL_INTRINSIC);
	if (!__registryIntrinsics.count(fn.getValueString())){
	assert(false);
	}

	IntrinsicFn fnCode = __registryIntrinsics.at(fn.getValueString());
	fn.op = Operator::CALL_INTRINSIC;
	fn.setValueDouble((int) fnCode);
	}

	bool
	AST::recognizeVariantConstructor(Expression& function) {
	assert(function.op == Operator::CALL);
	std::string variant = function.getValueString();
	if (!__registryVariants.count(variant)) {
	return false;
	}

	auto record = __registryVariants.at(variant);
	const TypeAnnotation& typ = record.first;

	function.op = Operator::VARIANT;
	function.setValueDouble(record.second);
	function.type = typ;
	return true;
	}

	Atom<Number_t>
	AST::recognizeVariantConstructor(Atom<Identifier_t> ident) {
	std::string variant = ident.get();
	assert(__registryVariants.count(variant) && "Can't recognize variant constructor");
	auto record = __registryVariants.at(variant);

	return Atom<Number_t>(record.second);
	}

	void
	AST::postponeIdentifier(CodeScope* scope, const Expression& id) {
	__bucketUnrecognizedIdentifiers.emplace(scope, id);
	}

	void
	AST::recognizePostponedIdentifiers() {
	for (const auto& identifier : __bucketUnrecognizedIdentifiers) {
	if (!identifier.first->recognizeIdentifier(identifier.second)) {
	//exception: Ident not found
	std::cout << "Unknown identifier: " << identifier.second.getValueString() << std::endl;
	assert(false && "Unknown identifier");
	}
	}
	}

	xreate::AST*
	AST::finalize() {
	//all finalization steps:
	recognizePostponedIdentifiers();

	return reinterpret_cast<xreate::AST*> (this);
	}

	void
	AST::initIntrinsics(){
	if (__registryIntrinsics.size()) return;

	__registryIntrinsics = {
	{"array_init", IntrinsicFn::ARR_INIT},
	{"fields", IntrinsicFn::REC_FIELDS},
	{"keys", IntrinsicFn::CON_KEYS}
	};
	}
	} } //namespace details::incomplete

	Expanded<TypeAnnotation>
	AST::findType(const std::string& name) {
	// find in general scope:
	if (__registryTypes.count(name))
	return expandType(__registryTypes.at(name));

	//if type is unknown keep it as is.
	TypeAnnotation t(TypeOperator::ALIAS, {});
	t.__valueCustom = name;
	return ExpandedType(move(t));
	}

	Expanded<TypeAnnotation>
	AST::expandType(const TypeAnnotation &t) const {
	return TypeResolver(this, nullptr, {}, {})(t);
	}

	ExpandedType
	AST::getType(const Expression& e, const TypeAnnotation& expectedT) {
	return typeinference::getType(e, expectedT, *this);
	}

	Function::Function(const Atom<Identifier_t>& name)
	: __entry(new CodeScope(0)) {
	__name = name.get();
	}

	void
	Function::addTag(Expression&& tag, const TagModifier mod) {
	string name = tag.getValueString();
	__tags.emplace(move(name), move(tag));
	}

	const std::map<std::string, Expression>&
	Function::getTags() const {
	return __tags;
	}

	CodeScope*
	Function::getEntryScope() const {
	return __entry;
	}

	void
	Function::addBinding(Atom <Identifier_t>&& name, Expression&& argument, const VNameId hintBindingId) {
	__entry->addBinding(move(name), move(argument), hintBindingId);
	}

	const std::string&
	Function::getName() const {
	return __name;
	}

	ScopedSymbol
	CodeScope::registerIdentifier(const Expression& identifier, const VNameId hintBindingId) {
	versions::VariableVersion version = Attachments::get<versions::VariableVersion>(identifier, versions::VERSION_NONE);

	auto result = __identifiers.emplace(identifier.getValueString(), hintBindingId? hintBindingId: __identifiers.size() + 1);
	return { result.first->second, version };
	}

	bool
	CodeScope::recognizeIdentifier(const Expression& identE) {
	versions::VariableVersion version = Attachments::get<versions::VariableVersion>(identE, versions::VERSION_NONE);
	const std::string& identStr = identE.getValueString();

	//search identifier in the current block
	if (__identifiers.count(identStr)) {
	VNameId id = __identifiers.at(identStr);

	Symbol identS;
	identS.identifier = ScopedSymbol{id, version};
	identS.scope = const_cast<CodeScope*> (this);
	Attachments::put<IdentifierSymbol>(identE, identS);

	return true;
	}

	//search in the parent scope
	bool result = false;
	if (__parent) {
	result = __parent->recognizeIdentifier(identE);
	}

	- if (trackExternalSymbs && result){
	+ if (bindExternalArgs && result){
	Symbol identS = Attachments::get<IdentifierSymbol>(identE);
	- boundExternalSymbs.insert(identS);
	+ boundArgs.insert(identS);
	}

	return result;
	}

	ScopedSymbol
	CodeScope::findSymbolByAlias(const std::string& alias) {
	assert(__identifiers.count(alias));
	VNameId id = __identifiers.at(alias);

	return {id, versions::VERSION_NONE };
	}

	void
	CodeScope::addBinding(Expression&& var, Expression&& argument, const VNameId hintBindingId) {
	argument.__state = Expression::BINDING;

	__bindings.push_back(var.getValueString());
	ScopedSymbol binding = registerIdentifier(var, hintBindingId);
	__declarations[binding] = move(argument);
	}

	Symbol
	CodeScope::addDefinition(Expression&& var, Expression&& body) {
	ScopedSymbol s = registerIdentifier(var);
	__declarations[s] = move(body);

	return Symbol{s, this};
	}

	CodeScope::CodeScope(CodeScope* parent)
	: __parent(parent) {
	}

	CodeScope::~CodeScope() {
	}

	void
	CodeScope::setBody(const Expression &body) {
	assert(__declarations.count(ScopedSymbol::RetSymbol)==0 && "Attempt to reassign scope body");
	__declarations[ScopedSymbol::RetSymbol] = body;
	}

	const Expression&
	CodeScope::getBody() const{
	return __declarations.at(ScopedSymbol::RetSymbol);
	}

	const Expression&
	CodeScope::getDefinition(const Symbol& symbol, bool flagAllowUndefined){
	const CodeScope* self = symbol.scope;
	return self->getDefinition(symbol.identifier, flagAllowUndefined);
	}

	const Expression&
	CodeScope::getDefinition(const ScopedSymbol& symbol, bool flagAllowUndefined) const{
	static Expression expressionInvalid;

	if (!__declarations.count(symbol)){
	if (flagAllowUndefined) return expressionInvalid;
	assert(false && "Symbol's declaration not found");
	}

	return __declarations.at(symbol);
	}

	void
	RuleArguments::add(const Atom<Identifier_t> &arg, DomainAnnotation typ) {
	emplace_back(arg.get(), typ);
	}

	void
	RuleGuards::add(Expression&& e) {
	push_back(e);
	}

	MetaRuleAbstract::
	MetaRuleAbstract(RuleArguments&& args, RuleGuards&& guards)
	: __args(std::move(args)), __guards(std::move(guards)) {
	}

	MetaRuleAbstract::~MetaRuleAbstract() {
	}

	RuleWarning::
	RuleWarning(RuleArguments&& args, RuleGuards&& guards, Expression&& condition, Atom<String_t>&& message)
	: MetaRuleAbstract(std::move(args), std::move(guards)), __message(message.get()), __condition(condition) {
	}

	RuleWarning::~RuleWarning() {
	}

	void
	RuleWarning::compile(TranscendLayer& layer) {
	//TODO restore addRuleWarning
	//layer.addRuleWarning(*this);
	}

	bool operator<(const ScopedSymbol& s1, const ScopedSymbol& s2) {
	return (s1.id < s2.id) \|\| (s1.id == s2.id && s1.version < s2.version);
	}

	bool operator==(const ScopedSymbol& s1, const ScopedSymbol& s2) {
	return (s1.id == s2.id) && (s1.version == s2.version);
	}

	bool operator<(const Symbol& s1, const Symbol& s2) {
	return (s1.scope < s2.scope) \|\| (s1.scope == s2.scope && s1.identifier < s2.identifier);
	}

	bool operator==(const Symbol& s1, const Symbol& s2) {
	return (s1.scope == s2.scope) && (s1.identifier == s2.identifier);
	}

	bool operator< (const ASTSite& s1, const ASTSite& s2){
	return s1.id < s2.id;
	}

	bool operator<(const Expression&a, const Expression&b) {
	if (a.__state != b.__state) return a.__state < b.__state;
	assert(a.__state != Expression::INVALID);
	switch (a.__state) {
	case Expression::IDENT:
	case Expression::STRING:
	return a.getValueString() < b.getValueString();

	case Expression::NUMBER:
	return a.getValueDouble() < b.getValueDouble();

	case Expression::COMPOUND:
	{
	assert(a.blocks.size() == 0);
	assert(b.blocks.size() == 0);

	if (a.op != b.op) {
	return a.op < b.op;
	}

	bool flagAValid = ExpressionHints::isStringValueValid(a);
	bool flagBValid = ExpressionHints::isStringValueValid(b);

	if (flagAValid != flagBValid) {
	return flagAValid < flagBValid;
	}

	if (flagAValid) {
	if (a.getValueString() != b.getValueString()) {
	return a.getValueString() < b.getValueString();
	}
	}

	flagAValid = ExpressionHints::isDoubleValueValid(a);
	flagBValid = ExpressionHints::isDoubleValueValid(b);

	if (flagAValid != flagBValid) {
	return flagAValid < flagBValid;
	}

	if (flagAValid) {
	if (a.getValueDouble() != b.getValueDouble()) {
	return a.getValueDouble() < b.getValueDouble();
	}
	}

	if (a.operands.size() != b.operands.size()) {
	return (a.operands.size() < b.operands.size());
	}

	for (size_t i = 0; i < a.operands.size(); ++i) {
	bool result = a.operands[i] < b.operands[i];
	if (result) return true;
	}

	return false;
	}

	case Expression::BINDING:
	case Expression::INVALID:
	assert(false);
	}

	return false;
	}

	bool
	Expression::operator==(const Expression& other) const {
	if (this->__state != other.__state) return false;

	if (ExpressionHints::isStringValueValid(*this)) {
	if (this->__valueS != other.__valueS) return false;
	}

	if (ExpressionHints::isDoubleValueValid(*this)) {
	if (this->__valueD != other.__valueD) return false;
	}

	if (this->__state != Expression::COMPOUND) {
	return true;
	}

	if (this->op != other.op) {
	return false;
	}

	if (this->operands.size() != other.operands.size()) {
	return false;
	}

	for (size_t i = 0; i<this->operands.size(); ++i) {
	if (!(this->operands[i] == other.operands[i])) return false;
	}

	assert(!this->blocks.size());
	assert(!other.blocks.size());

	return true;
	}

	const ScopedSymbol
	ScopedSymbol::RetSymbol = ScopedSymbol{0, versions::VERSION_NONE};

	Expression
	ASTSite::getDefinition() const{
	if (Attachments::exists<ExprAlias_A>(id)){
	Symbol siteS = Attachments::get<ExprAlias_A>(id);
	return CodeScope::getDefinition(siteS, true);
	}

	return Attachments::get<ExprId_A>(id);
	}
	} //end of namespace xreate




	diff --git a/cpp/src/ast.h b/cpp/src/ast.h
	index 20f7ea9..4cfba9e 100644
	--- a/cpp/src/ast.h
	+++ b/cpp/src/ast.h
	@@ -1,755 +1,755 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* File: ast.h
	*/

	/**
	* \file ast.h
	* \brief A syntax tree representation and related code
	*
	* \sa xreate::AST
	*/

	#ifndef AST_H
	#define AST_H

	#include "attachments.h"
	#include "utils.h"

	#include <string>
	#include <list>
	#include <vector>
	#include <map>
	#include <set>
	#include <unordered_map>
	#include <unordered_set>
	#include <algorithm>
	#include <climits>

	namespace xreate {
	struct ScopedSymbol;
	struct Symbol;
	}

	namespace std {
	template<>
	struct hash<xreate::ScopedSymbol> {
	std::size_t operator()(xreate::ScopedSymbol const& s) const;
	};

	template<>
	struct equal_to<xreate::ScopedSymbol> {
	bool operator()(const xreate::ScopedSymbol& __x, const xreate::ScopedSymbol& __y) const;
	};

	template<>
	struct hash<xreate::Symbol> {
	size_t operator()(xreate::Symbol const& s) const;
	};

	template<>
	struct equal_to<xreate::Symbol> {
	bool operator()(const xreate::Symbol& __x, const xreate::Symbol& __y) const;
	};
	}

	namespace xreate {

	struct String_t {
	};

	struct Identifier_t {
	};

	struct Number_t {
	};

	struct Type_t {
	};

	template<typename A>
	class Atom {
	};

	//DEBT store line:col for all atoms/identifiers
	template<> class
	Atom<Identifier_t> {
	public:
	Atom(const std::wstring& value);
	Atom(std::string && name);
	const std::string& get() const;

	private:
	std::string __value;
	};

	template<>
	class Atom<Number_t> {
	public:
	Atom(wchar_t* value);
	Atom(int value);
	double get()const;

	private:
	double __value;
	};

	template<>
	class Atom<String_t> {
	public:
	Atom(const std::wstring& value);
	Atom(std::string && name);
	const std::string& get() const;

	private:
	std::string __value;
	};

	enum class TypePrimitive {
	Invalid, Bool, I8, I32, I64, Int, Float, String
	};

	enum class TypeOperator {
	NONE, VOID, REF, ALIAS, VARIANT, ARRAY, RECORD, ACCESS, SLAVE, GUARD
	};

	struct struct_tag {
	};
	const struct_tag tag_struct = struct_tag();

	/**
	* \brief A type representation to support type system
	*
	* The class represents type in a denormalized form, i.e. with no arguments and aliases substitution
	* \sa AST::expandType()
	*/
	class TypeAnnotation {
	public:
	TypeAnnotation();
	TypeAnnotation(TypePrimitive typ);

	TypeAnnotation(TypeOperator op, std::initializer_list<TypeAnnotation> operands);
	TypeAnnotation(TypeOperator op, std::vector<TypeAnnotation>&& operands);
	static TypeAnnotation alias(const std::string& alias);
	void addBindings(std::vector<Atom<Identifier_t>>&& params);
	void addFields(std::vector<Atom<Identifier_t>>&& listFields);
	bool operator<(const TypeAnnotation& t) const;
	// TypeAnnotation (struct_tag, std::initializer_list<TypePrimitive>);

	bool isValid() const;

	TypeOperator __operator = TypeOperator::NONE;

	std::vector<TypeAnnotation> __operands;
	TypePrimitive __value;
	std::string __valueCustom;

	std::vector<std::string> fields;
	std::vector<std::string> bindings;
	private:
	};

	enum class Operator {
	INVALID, UNDEF, AND, OR, ADD, SUB, MUL, DIV, MOD,
	EQU, NE, NEG, LSS,
	LSE, GTR, GTE, LIST,
	LIST_INDEX, LIST_RANGE,
	CALL, CALL_INTRINSIC, QUERY, QUERY_LATE,
	IMPL/* implication */, MAP,
	FOLD, FOLD_INF, INDEX,
	IF, SWITCH, SWITCH_VARIANT, SWITCH_LATE,
	CASE, CASE_DEFAULT, LOGIC_AND,
	CONTEXT_RULE, VARIANT, SEQUENCE, UPDATE
	};

	class Function;
	class AST;
	class CodeScope;
	class MetaRuleAbstract;

	typedef ManagedPtr<Function> ManagedFnPtr;
	typedef ManagedPtr<CodeScope> ManagedScpPtr;
	typedef ManagedPtr<MetaRuleAbstract> ManagedRulePtr;
	const ManagedScpPtr NO_SCOPE = ManagedScpPtr(UINT_MAX, 0);

	/**
	* \brief AST node to represent a single instruction or an annotation
	* \attention In case of any changes update \ref xreate::ExpressionHints auxiliary helper as well
	*
	* %Expression is a generic building block of syntax tree which is able to hold node data
	* along with child nodes as operands.
	*
	* \note For types the %expression-like data structure \ref TypeAnnotation is used rather than Expression itself.
	* \sa xreate::AST, xreate::TypeAnnotation
	*/
	struct Expression {
	friend class CodeScope;
	friend class TranscendLayer;
	friend class CFAPass;
	friend class ExpressionHints;

	Expression(const Operator &oprt, std::initializer_list<Expression> params);
	Expression(const Atom<Identifier_t>& ident);
	Expression(const Atom<Number_t>& number);
	Expression(const Atom<String_t>& a);

	Expression();

	void setOp(Operator oprt);
	void addArg(Expression&& arg);
	void addBindings(std::initializer_list<Atom<Identifier_t>> params);
	void bindType(TypeAnnotation t);

	template<class InputIt>
	void addBindings(InputIt paramsBegin, InputIt paramsEnd);
	void addTags(const std::list<Expression> tags) const;
	void addBlock(ManagedScpPtr scope);

	const std::vector<Expression>& getOperands() const;
	double getValueDouble() const;
	void setValueDouble(double value);
	const std::string& getValueString() const;
	void setValue(const Atom<Identifier_t>&& v);
	bool isValid() const;
	bool isDefined() const;


	bool operator==(const Expression& other) const;

	/**
	* \brief is it string, number, compound operation and so on
	*/
	enum {
	INVALID, COMPOUND, IDENT, NUMBER, STRING, BINDING
	} __state = INVALID;

	/**
	* \brief Valid for compound State. Holds type of compound operator
	*/
	Operator op;

	/**
	* \brief Unique id to identify expression within syntax tree
	*/
	unsigned int id;

	/**
	* \brief Exact meaning depends on particular instruction
	* \details As an example, named lists/structs hold field names in bindings
	*/
	std::vector<std::string> bindings;

	/**
	* \brief Holds child instructions as arguments
	*/
	std::vector<Expression> operands;

	/**
	* \brief Holds type of instruction's result
	*/
	TypeAnnotation type;

	/**
	* \brief Holds additional annotations
	*/
	mutable std::map<std::string, Expression> tags;

	/**
	* \brief Child code blocks
	* \details For example, If statement holds TRUE-branch as first and FALSE-branch as second block here
	*/
	std::list<CodeScope*> blocks;

	private:
	std::string __valueS;
	double __valueD;

	static unsigned int nextVacantId;
	};

	bool operator<(const Expression&, const Expression&);

	template<class InputIt>
	void Expression::addBindings(InputIt paramsBegin, InputIt paramsEnd) {
	size_t index = bindings.size();

	std::transform(paramsBegin, paramsEnd, std::inserter(bindings, bindings.end()),
	[&index, this] (const Atom<Identifier_t> atom) {
	std::string key = atom.get();
	return key;
	});
	}

	typedef std::list<Expression> ExpressionList;

	enum class TagModifier {
	NONE, ASSERT, REQUIRE
	};

	enum class DomainAnnotation {
	FUNCTION, VARIABLE
	};

	class RuleArguments : public std::vector<std::pair<std::string, DomainAnnotation>>
	{
	public:
	void add(const Atom<Identifier_t>& name, DomainAnnotation typ);
	};

	class RuleGuards : public std::vector<Expression> {
	public:
	void add(Expression&& e);
	};


	class TranscendLayer;
	class LLVMLayer;

	class MetaRuleAbstract {
	public:
	MetaRuleAbstract(RuleArguments&& args, RuleGuards&& guards);
	virtual ~MetaRuleAbstract();
	virtual void compile(TranscendLayer& layer) = 0;
	protected:
	RuleArguments __args;
	RuleGuards __guards;
	};

	class RuleWarning : public MetaRuleAbstract {
	friend class TranscendLayer;
	public:
	RuleWarning(RuleArguments&& args, RuleGuards&& guards, Expression&& condition, Atom<String_t>&& message);
	virtual void compile(TranscendLayer& layer);
	~RuleWarning();

	private:
	std::string __message;
	Expression __condition;
	};

	typedef unsigned int VNameId;

	namespace versions {
	typedef int VariableVersion;
	const VariableVersion VERSION_NONE = -2;
	const VariableVersion VERSION_INIT = 0;
	}

	template<>
	struct AttachmentsDict<versions::VariableVersion> {
	typedef versions::VariableVersion Data;
	static const unsigned int key = 6;
	};

	struct ScopedSymbol {
	VNameId id;
	versions::VariableVersion version;

	static const ScopedSymbol RetSymbol;
	};

	struct Symbol {
	ScopedSymbol identifier;
	const CodeScope * scope;
	};

	struct ASTSite {
	unsigned int id;

	Expression getDefinition() const;
	//static Ast registerSite(const Expression& e);
	};

	struct IdentifierSymbol{};
	struct ExprAlias_A{};
	struct ExprId_A{};

	template<>
	struct AttachmentsDict<IdentifierSymbol> {
	typedef Symbol Data;
	static const unsigned int key = 7;
	};

	template<>
	struct AttachmentsDict<ExprAlias_A> {
	typedef Symbol Data;
	static const unsigned int key = 9;
	};

	template<>
	struct AttachmentsDict<ExprId_A>{
	typedef Expression Data;
	static const unsigned int key = 12;
	};

	typedef std::pair<Expression, TagModifier> Tag;

	bool operator<(const ScopedSymbol& s1, const ScopedSymbol& s2);
	bool operator==(const ScopedSymbol& s1, const ScopedSymbol& s2);
	bool operator<(const Symbol& s1, const Symbol& s2);
	bool operator==(const Symbol& s1, const Symbol& s2);
	bool operator< (const ASTSite& s1, const ASTSite& s2);

	/**
	* \brief AST node to represent a single code block/a scope of visibility
	*
	* Holds a single expression as a `body` along with set of variable assignments(declarations) used in body's expression.
	* \sa xreate::AST
	*/
	class CodeScope {
	friend class Function;
	friend class PassManager;

	public:
	CodeScope(CodeScope* parent = 0);
	~CodeScope();

	/** \brief Set expression as a body */
	void setBody(const Expression& body);

	/** \brief Returns current code scope body */
	const Expression& getBody() const;

	/** \brief Adds variable definition to be used in body as well as in other declarations */
	Symbol addDefinition(Expression&& var, Expression&& body);

	/** \brief Returns symbols' definition */
	static const Expression& getDefinition(const Symbol& symbol, bool flagAllowUndefined = false);
	const Expression& getDefinition(const ScopedSymbol& symbol, bool flagAllowUndefined = false) const;

	/** \brief Adds variable defined elsewhere */
	void addBinding(Expression&& var, Expression&& argument, const VNameId hintBindingId = 0);

	std::vector<std::string> __bindings;
	std::map<std::string, VNameId> __identifiers;
	CodeScope* __parent;

	//TODO move __definitions to SymbolsAttachments data
	//NOTE: definition of return type has index 0
	std::unordered_map<ScopedSymbol, Expression> __declarations;
	std::vector<Expression> tags;
	std::vector<Expression> contextRules;

	- bool trackExternalSymbs = false;
	- std::set<Symbol> boundExternalSymbs;
	+ bool bindExternalArgs = false;
	+ std::set<Symbol> boundArgs;

	private:
	ScopedSymbol registerIdentifier(const Expression& identifier, const VNameId hintBindingId = 0);

	public:
	bool recognizeIdentifier(const Expression& identE);
	ScopedSymbol findSymbolByAlias(const std::string& alias);
	};

	/**
	* \brief AST node to represent a single function
	*
	* Holds an `__entry` entry code scope along with `guard` to denote the different specializations.
	* \sa xreate::AST
	*/
	class Function {
	friend class Expression;
	friend class CodeScope;
	friend class AST;

	public:
	Function(const Atom<Identifier_t>& name);

	/**
	* \brief Adds function arguments
	*/
	void addBinding(Atom <Identifier_t>&& name, Expression&& argument, const VNameId hintBindingId=0);

	/**
	* \brief Adds additional function annotations
	*/
	void addTag(Expression&& tag, const TagModifier mod);

	const std::string& getName() const;
	const std::map<std::string, Expression>& getTags() const;
	CodeScope* getEntryScope() const;
	CodeScope* __entry;
	std::string __name;
	Expression guard;

	private:
	std::map<std::string, Expression> __tags;
	};


	class ExternData;

	typedef Expanded<TypeAnnotation> ExpandedType;

	struct TypeInferred{};
	template<>
	struct AttachmentsDict<TypeInferred> {
	typedef ExpandedType Data;
	static const unsigned int key = 11;
	};

	enum ASTInterface {
	CFA, DFA, Extern, Adhoc
	};

	struct FunctionSpecialization {
	std::string guard;
	size_t id;
	};

	struct FunctionSpecializationQuery {
	std::unordered_set<std::string> context;
	};

	template<>
	struct AttachmentsId<Expression>{
	static unsigned int getId(const Expression& expression){
	return expression.id;
	}
	};

	template<>
	struct AttachmentsId<Symbol>{
	static unsigned int getId(const Symbol& s){
	return s.scope->__declarations.at(s.identifier).id;
	}
	};

	template<>
	struct AttachmentsId<ManagedFnPtr>{
	static unsigned int getId(const ManagedFnPtr& f){
	const Symbol symbolFunction{ScopedSymbol::RetSymbol, f->getEntryScope()};

	return AttachmentsId<Symbol>::getId(symbolFunction);
	}
	};

	template<>
	struct AttachmentsId<CodeScope*>{
	static unsigned int getId(const CodeScope* scope){
	const Symbol symbolScope{ScopedSymbol::RetSymbol, scope};
	return AttachmentsId<Symbol>::getId(symbolScope);
	}
	};

	template<>
	struct AttachmentsId<unsigned int>{
	static unsigned int getId(const unsigned int id){
	return id;
	}
	};

	class TypeResolver;

	enum class IntrinsicFn {
	ARR_INIT,
	REC_FIELDS,
	CON_KEYS
	};

	namespace details { namespace inconsistent {

	/**
	* \brief AST in an inconsistent form during construction
	*
	* Represents AST under construction(inconsistent state).
	* \attention Clients should use rather xreate::AST unless client's code explicitly works with Syntax Tree during construction.
	*
	* Typically an instance is created by xreate::XreateManager only and filled out by the parser
	* \sa xreate::XreateManager::prepare(std::string&&)
	*/
	class AST {
	friend class xreate::TypeResolver;
	public:
	AST();

	/**
	* \brief Adds new function to AST
	* \param f Function to register
	*/
	void add(Function* f);

	/**
	* \brief Adds new declarative rule to AST
	* \param r Declarative Rule
	*/
	void add(MetaRuleAbstract* r);

	/** \brief Registers new code block */
	ManagedScpPtr add(CodeScope* scope);

	/**
	* \brief Add new type to AST
	* @param t Type definition
	* @param alias Typer name
	*/
	void add(TypeAnnotation t, Atom<Identifier_t> alias);

	/** \brief Current module's name */
	std::string getModuleName();

	/**
	* \brief Looks for function with given name
	* \param name Function name to find
	* \note Requires that only one function exists under given name
	* \return Found function
	*/
	ManagedPtr<Function> findFunction(const std::string& name);

	/** \brief Returns all function in AST */
	std::list<ManagedFnPtr> getAllFunctions() const;

	/**
	* \brief Returns all specializations of a function with a given name
	* \param fnName function to find
	* \return list of found function specializations
	*/
	std::list<ManagedFnPtr> getFnSpecializations(const std::string& fnName) const;

	/**
	* \return First element in Functions/Scopes/Rules list depending on template parameter
	* \tparam Target either Function or CodeScope or MetaRuleAbstract
	*/
	template<class Target>
	ManagedPtr<Target> begin();

	/**
	* \brief Performs all necessary steps after AST is built
	*
	* Performs all finalization steps and moves AST into consistent state represented by xreate::AST
	* \sa xreate::AST
	* \return AST in consistent state
	*/
	xreate::AST* finalize();

	typedef std::multimap<std::string, unsigned int> FUNCTIONS_REGISTRY;

	//std::list<ExternData> __externdata;
	std::list<Expression> __dfadata; //TODO move to more appropriate place
	std::list<std::string> __rawImports; //TODO move to more appropriate place
	std::multimap<ASTInterface, Expression> __interfacesData; //TODO CFA data here.

	private:
	std::vector<MetaRuleAbstract*> __rules;
	std::vector<Function*> __functions;
	std::vector<CodeScope*> __scopes;

	FUNCTIONS_REGISTRY __dictFunctions;

	protected:
	std::map<std::string, TypeAnnotation> __registryTypes;

	public:
	/**
	* \brief Stores DFA scheme for later use by DFA Pass
	*
	* Treats expression as a DFA scheme and feeds to the DFA Pass later
	* \param data DFA Scheme
	* \sa xreate::DFAPass
	*/
	void addDFAData(Expression&& data);

	/** \brief Stores data for later use by xreate::ExternLayer */
	void addExternData(ExternData&& entry);

	/**
	* \brief Generalized function to store particular data for later use by particular pass
	* \param interface Particular Interface
	* \param data Particular data
	*/
	void addInterfaceData(const ASTInterface& interface, Expression&& data);


	/*\name Symbols Recognition /
	///@{
	public:
	//TODO revisit enums/variants, move to codescope
	/**
	* \brief Tries to find out whether expression is Variant constructor
	*/
	bool recognizeVariantConstructor(Expression& function);
	Atom<Number_t> recognizeVariantConstructor(Atom<Identifier_t> ident);
	/**
	* \brief Postpones unrecognized identifier for future second round of recognition
	* \param scope Code block identifier is encountered
	* \param id Identifier
	*/
	void postponeIdentifier(CodeScope* scope, const Expression& id);

	/** \brief Second round of identifiers recognition done right after AST is fully constructed */
	void recognizePostponedIdentifiers();

	void recognizeIntrinsic(Expression& fn) const;
	private:
	std::map<std::string, std::pair<TypeAnnotation, int>> __registryVariants;
	static std::map<std::string, IntrinsicFn> __registryIntrinsics;
	std::set<std::pair<CodeScope*, Expression>> __bucketUnrecognizedIdentifiers;

	static void initIntrinsics();

	public:

	///@}
	};

	template<>
	ManagedPtr<Function>
	AST::begin<Function>();

	template<>
	ManagedPtr<CodeScope>
	AST::begin<CodeScope>();

	template<>
	ManagedPtr<MetaRuleAbstract>
	AST::begin<MetaRuleAbstract>();

	} } // namespace details::incomplete

	/**
	* \brief AST in a consistent state
	*
	* AST has two mutually exclusive possible states:
	* - an inconsistent state while AST is under construction. Represented by xreate::details::inconsistent::AST
	* - a consistent state when AST is built and finalize() is invoked.
	*
	* This class represents a consistent state and should be used by clients unless client's code explicitly works with AST under construction.
	* Consistent AST enables access to additional functions(such as type management).
	* \sa xreate::details::inconsistent::AST
	*/
	class AST : public details::inconsistent::AST {
	public:

	AST() : details::inconsistent::AST() {}

	/**
	* \brief Computes fully expanded form of type by substituting all arguments and aliases
	* \param t Type to expand
	* \return Expdanded or normal form of type
	* \sa TypeAnnotation
	*/
	ExpandedType expandType(const TypeAnnotation &t) const;

	/**
	* Searches type by given name
	* \param name Typename to search
	* \return Expanded or normal form of desired type
	* \note if type name is not found returns new undefined type with this name
	*/
	ExpandedType findType(const std::string& name);

	/**
	* Invokes Type Inference Analysis to find out expanded(normal) form expressions's type
	* \sa typeinference.h
	* \param e
	* \param expectedT expected type
	* \return Type of expression

	*/
	ExpandedType getType(const Expression& e, const TypeAnnotation& expectedT = TypeAnnotation());
	};
	}
	#endif // AST_H
	diff --git a/cpp/src/attachments.h b/cpp/src/attachments.h
	index 8b9c0cb..3243f01 100644
	--- a/cpp/src/attachments.h
	+++ b/cpp/src/attachments.h
	@@ -1,184 +1,183 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* File: attachments.h
	* Date: 3/15/15
	*/

	/**
	* \file attachments.h
	* \brief The attachments support: a mechanism to attach additional data to AST nodes
	*/

	#ifndef _XREATE_ATTACHMENTS_H_
	#define _XREATE_ATTACHMENTS_H_
	#include <unordered_map>
	#include <vector>
	#include <assert.h>
	#include <type_traits>

	namespace xreate
	{
	/** \brief Attachments dictionary */
	- template<class Tag>
	- struct AttachmentsDict
	- {
	- // typedef void Data;
	- // static const unsigned int key (next vacant id - 12);
	-
	// Defined attachments:
	-//-----------------------------------------------------
	+//-----------------------------------------------------
	// 1 containers::Implementation
	// 3 interpretation::InterpretationData
	// 5 interpretation::I12nFunctionSpec
	// 6 VariableVersion
	// 7 IdentifierSymbol
	// 8 versions::VersionImposedDependency
	// 9 ExprAlias_A
	// 11 TypeInferred
	// 12 ExprId_A
	+ template<class Tag>
	+ struct AttachmentsDict
	+ {
	+ // typedef void Data;
	+ // static const unsigned int key (next vacant id - 13);
	};
	-
	+
	template<class Object>
	struct AttachmentsId{
	//static unsigned int getId(const Object& object);
	};

	template<class Data>
	class IAttachmentsContainer{
	protected:
	virtual bool __exists(const unsigned int object)=0;
	virtual Data& __get(const unsigned int object)=0;
	virtual void __put(const unsigned int object, Data data)=0;

	public:
	template<class Id>
	bool exists(const Id& object){
	unsigned int id = AttachmentsId<Id>::getId(object);

	return __exists(id);
	}

	template<class Id>
	Data& get(const Id& object){
	unsigned int id = AttachmentsId<Id>::getId(object);

	return __get(id);
	}

	template<class Id>
	Data get(const Id& object, const Data& dataDefault){
	unsigned int id = AttachmentsId<Id>::getId(object);

	if (! __exists(id)){
	return dataDefault;
	}

	return __get(id);
	}

	template<class Id>
	void put(const Id& object, Data data){
	unsigned int id = AttachmentsId<Id>::getId(object);

	__put(id, data);
	}

	virtual ~IAttachmentsContainer(){};
	};

	template<class Data>
	class AttachmentsContainerDefault: public IAttachmentsContainer<Data>{
	private:
	std::unordered_map<unsigned int, Data> __data;

	virtual bool __exists(const unsigned int id){
	return __data.count(id);
	}

	virtual Data& __get(const unsigned int id){
	return __data.at(id);
	}

	virtual void __put(const unsigned int id, Data data){
	auto result = __data.emplace(id, data);
	assert(result.second);
	}

	public:
	std::unordered_map<unsigned int, Data>& getRawStorage() {
	return __data;
	}
	};

	/** \brief Implements %AST attachments mechanism to facilitate data sharing among different analyzers and compilation phases */
	class Attachments{
	private:
	static std::vector<void*> __storage;

	template<class Tag>
	using Data = typename AttachmentsDict<Tag>::Data;

	public:
	template<class Tag, class Id>
	static bool exists(const Id& object) {
	assert(AttachmentsDict<Tag>::key < __storage.size());
	assert(__storage.at(AttachmentsDict<Tag>::key));

	IAttachmentsContainer<Data<Tag>>* self = reinterpret_cast<IAttachmentsContainer<Data<Tag>>*>(__storage.at(AttachmentsDict<Tag>::key));
	return self->exists(object);
	}

	template<class Tag, class Id>
	static Data<Tag>& get(const Id& object){
	assert(AttachmentsDict<Tag>::key < __storage.size());
	assert(__storage.at(AttachmentsDict<Tag>::key));

	IAttachmentsContainer<Data<Tag>>* self = reinterpret_cast<IAttachmentsContainer<Data<Tag>>*>(__storage.at(AttachmentsDict<Tag>::key));
	return self->get(object);
	}

	template<class Tag, class Id>
	static Data<Tag> get(const Id& object, const Data<Tag>& dataDefault){
	assert(AttachmentsDict<Tag>::key < __storage.size());
	assert(__storage.at(AttachmentsDict<Tag>::key));

	IAttachmentsContainer<Data<Tag>>* self = reinterpret_cast<IAttachmentsContainer<Data<Tag>>*>(__storage.at(AttachmentsDict<Tag>::key));
	return self->get(object, dataDefault);
	}

	template<class Tag, class Id>
	static void put(const Id& object, Data<Tag> data){
	assert(AttachmentsDict<Tag>::key < __storage.size());
	assert(__storage.at(AttachmentsDict<Tag>::key));

	IAttachmentsContainer<Data<Tag>>* self = reinterpret_cast<IAttachmentsContainer<Data<Tag>>*>(__storage.at(AttachmentsDict<Tag>::key));
	self->put(object, data);
	}

	template<class Tag>
	static void init(){
	unsigned int keyStorage = AttachmentsDict<Tag>::key;
	if (keyStorage+1 > __storage.size()){
	__storage.resize(keyStorage + 1, nullptr);
	}

	__storage[keyStorage] = new AttachmentsContainerDefault<Data<Tag>>();
	}

	template<class Tag>
	static void init(IAttachmentsContainer<Data<Tag>>* container){
	unsigned int keyStorage = AttachmentsDict<Tag>::key;
	if (keyStorage+1 > __storage.size()){
	__storage.resize(keyStorage + 1, nullptr);
	}

	__storage[keyStorage] = container;
	}
	};

	}

	#endif //_XREATE_ATTACHMENTS_H_
	diff --git a/cpp/src/aux/xreatemanager-decorators.cpp b/cpp/src/aux/xreatemanager-decorators.cpp
	index e882b7a..5a5f5f6 100644
	--- a/cpp/src/aux/xreatemanager-decorators.cpp
	+++ b/cpp/src/aux/xreatemanager-decorators.cpp
	@@ -1,103 +1,103 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* xreatemanager-decorators.cpp
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* Created on July 16, 2017, 4:40 PM
	*/

	/**
	* \file xreatemanager-decorators.h
	* \brief \ref xreate::XreateManager decorators to provide various functionality
	*/

	#include "aux/xreatemanager-decorators.h"
	#include "main/Parser.h"
	#include "pass/compilepass.h"
	#include "transcendlayer.h"
	#include "analysis/transcendtarget.h"
	#include "pass/interpretationpass.h"

	#ifndef XREATE_CONFIG_MIN
	#include "pass/cfapass.h"
	#include "pass/dfapass.h"
	#include "pass/versionspass.h"
	#include "pass/cfatemporalseqpass.h"
	#endif

	namespace xreate{

	void
	XreateManagerDecoratorBase::initPasses() { }

	void
	XreateManagerDecoratorBase::prepareCode(std::string&& code) {
	grammar::main::Scanner scanner(reinterpret_cast<const unsigned char*> (code.c_str()), code.size());
	grammar::main::Parser parser(&scanner);
	parser.Parse();
	assert(!parser.errors->count && "Parser errors");

	PassManager::prepare(parser.root->finalize());
	}

	void
	XreateManagerDecoratorBase::prepareCode(FILE* code){
	grammar::main::Scanner scanner(code);
	grammar::main::Parser parser(&scanner);
	parser.Parse();
	assert(!parser.errors->count && "Parser errors");

	PassManager::prepare(parser.root->finalize());
	}

	void
	XreateManagerDecoratorBase::analyse() {
	- CompilePass::prepareQueries(transcend);
	- transcend->run();
	+ CompilePass::prepareQueries(transcend);
	+ transcend->run();
	}

	void
	XreateManagerDecoratorFull::initPasses() {
	#ifndef XREATE_CONFIG_MIN
	cfa::CFAPass* passCFG = new cfa::CFAPass(this);
	registerPass(new dfa::DFAPass(this), PassId::DFAPass);
	registerPass(passCFG, PassId::CFAPass);
	registerPass(new versions::VersionsPass(this), PassId::VersionsPass);
	registerPass(new cfa::CFATemporalSeqPass(this), PassId::CFATemporalSeqPass);
	#endif

	registerPass(new interpretation::InterpretationPass(this), PassId::InterpretationPass);
	registerPass(new TranscendPass(this), PassId::TranscendPass);
	}

	void*
	XreateManagerDecoratorFull::run() {
	transcend->deleteReports();
	__compiler = new compilation::CompilePassCustomDecorators<>(this);
	__compiler->run();

	llvm->print();
	llvm->initJit();
	if (options.requireEntryFn){
	assert(__compiler->getEntryFunction());
	}

	if (__compiler->getEntryFunction())
	return llvm->getFunctionPointer(__compiler->getEntryFunction());

	return nullptr;
	}

	void*
	XreateManagerDecoratorFull::getExteriorFn(const string& fnName){
	ManagedFnPtr fnTarget = root->findFunction(fnName);
	assert(fnTarget);

	compilation::IBruteFunction* fnBrute = __compiler->getBruteFn(fnTarget);
	llvm::Function* fnRaw = fnBrute->compile();
	return llvm->getFunctionPointer(fnRaw);
	}

	} //namespace xreate
	diff --git a/cpp/src/compilation/containers.cpp b/cpp/src/compilation/containers.cpp
	index f71c4fd..6f7860c 100644
	--- a/cpp/src/compilation/containers.cpp
	+++ b/cpp/src/compilation/containers.cpp
	@@ -1,374 +1,401 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: containers.cpp
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	/**
	* \file compilation/containers.h
	* \brief Containers compilation support. See [Containers](/d/concepts/containers/) in the Xreate's documentation.
	*/

	#include "compilation/containers.h"
	#include "compilation/targetinterpretation.h"
	#include "aux/expressions.h"
	#include "compilation/containers/arrays.h"
	#include "compilation/lambdas.h"
	#include "analysis/predefinedanns.h"
	#include "analysis/utils.h"

	+using namespace xreate::compilation;
	using namespace std;

	namespace xreate { namespace containers{

	ImplementationType
	IContainersIR::getImplementation(const Expression& aggrE, AST* ast){
	auto manPredefined = analysis::PredefinedAnns::instance();
	const Expression& hintE = analysis::findAnnByType(aggrE, ExpandedType(manPredefined.hintsContT), ast);
	assert(hintE.isValid());

	return (ImplementationType ) hintE.getValueDouble();
	}

	IContainersIR *
	IContainersIR::create(const Expression &aggrE, const TypeAnnotation &expectedT, const compilation::Context &context){
	ExpandedType aggrT = context.pass->man->root->getType(aggrE, expectedT);
	Expression aggr2E;

	if (aggrE.__state == Expression::IDENT && !aggrE.tags.size()){
	Symbol aggrS = Attachments::get<IdentifierSymbol>(aggrE);
	aggr2E = CodeScope::getDefinition(aggrS);
	} else {
	aggr2E = aggrE;
	}

	switch(aggr2E.op){
	case Operator::LIST:{
	typehints::ArrayHint aggrHint = typehints::find(
	aggr2E, typehints::ArrayHint{aggr2E.operands.size()}
	);

	return new ArrayIR(aggrT, aggrHint, context);
	}

	default:
	typehints::ArrayHint aggrHint = typehints::find(
	aggr2E, typehints::ArrayHint{0}
	);
	assert(aggrHint.size != 0);
	return new ArrayIR(aggrT, aggrHint, context);
	}

	assert(false);
	return nullptr;
	}

	llvm::Type*
	IContainersIR::getRawType(const Expression& aggrE, const ExpandedType& aggrT, LLVMLayer* llvm){
	auto manPredefined = analysis::PredefinedAnns::instance();
	const Expression& hintE = analysis::findAnnByType(aggrE, ExpandedType(manPredefined.hintsContT), llvm->ast);
	assert(hintE.isValid());

	return getRawTypeByHint(hintE, aggrT, llvm);
	}

	llvm::Type*
	IContainersIR::getRawTypeByHint(const Expression& hintE, const ExpandedType& aggrT, LLVMLayer* llvm) {
	ImplementationType hintImpl = (ImplementationType ) hintE.getValueDouble();
	switch (hintImpl){
	case SOLID: {
	typehints::ArrayHint hint = typehints::parse<typehints::ArrayHint>(hintE);
	return ArrayIR::getRawType(aggrT, hint, llvm);
	}

	case ON_THE_FLY:{
	typehints::FlyHint hint = typehints::parse<typehints::FlyHint>(hintE);
	return FlyIR::getRawType(aggrT, hint, llvm);
	}

	case RANGE: {
	return RangeIR::getRawType(aggrT, llvm);
	}
	}

	assert(false);
	return nullptr;
	}

	+uint64_t
	+IContainersIR::getAllocSize(const Expression& aggrE, LLVMLayer* llvm){
	+ switch( getImplementation(aggrE, llvm->ast)){
	+ case ON_THE_FLY: {
	+ return FlyIR::getAllocSize(aggrE, llvm);
	+ }
	+
	+ case SOLID:{
	+ typehints::ArrayHint hint = typehints::find<typehints::ArrayHint>(aggrE, {});
	+ return ArrayIR::getAllocSize(llvm->ast->getType(aggrE), hint, llvm);
	+ }
	+
	+ default: break;
	+ }
	+
	+ return 0;
	+}
	+
	llvm::Value *
	RecordIR::init(llvm::StructType *tyAggr){
	return llvm::UndefValue::get(tyAggr);
	}

	llvm::Value*
	RecordIR::init(std::forward_list<llvm::Type*> fields){
	std::vector<llvm::Type*> fieldsVec(fields.begin(), fields.end());
	llvm::ArrayRef<llvm::Type *> fieldsArr(fieldsVec);
	llvm::StructType* resultTR = llvm::StructType::get(__context.pass->man->llvm->llvmContext, fieldsArr, false);

	return init(resultTR);
	}

	llvm::Value *
	-RecordIR::update(llvm::Value *aggrRaw, const ExpandedType &aggrT, const Expression &updE){
	+RecordIR::update(llvm::Value *aggrRaw, const ExpandedType &aggrT, const Expression &updE, const std::string& hintAlias){
	interpretation::InterpretationScope *scopeI12n =
	__context.pass->targetInterpretation->transformContext(__context);
	TypesHelper helper(__context.pass->man->llvm);
	const auto &fields = helper.getRecordFields(aggrT);

	std::map<std::string, size_t> indexFields;
	for(size_t i = 0, size = fields.size(); i < size; ++i){
	indexFields.emplace(fields[i], i);
	}

	for(const auto &entry: reprListAsDict(updE)){
	unsigned keyId;
	std::string keyHint;
	const Expression keyE = scopeI12n->process(entry.first);

	switch(keyE.__state){
	case Expression::STRING:
	keyId = indexFields.at(keyE.getValueString());
	keyHint = keyE.getValueString();
	break;

	case Expression::NUMBER:
	keyId = keyE.getValueDouble();
	keyHint = aggrT->fields.at(keyId);
	break;
	default:
	assert(false);
	break;
	}

	const TypeAnnotation &valueT = aggrT->__operands.at(keyId);

	llvm::Value *valueRaw = __context.scope->process(entry.second, keyHint, valueT);
	aggrRaw = __context.pass->man->llvm->irBuilder.CreateInsertValue(
	- aggrRaw,
	- valueRaw,
	- keyId);
	+ aggrRaw,
	+ valueRaw,
	+ keyId);
	}

	+ aggrRaw->setName(hintAlias);
	return aggrRaw;
	}

	+uint64_t
	+FlyIR::getAllocSize(const Expression& expr, LLVMLayer* llvm){
	+ assert(expr.op == Operator::MAP);
	+ return LambdaIR::getAllocSize(expr.blocks.front(), llvm);
	+}
	+
	llvm::Value*
	-FlyIR::init(llvm::Value* sourceRaw, CodeScope* body, const std::string& hintAlias){
	+FlyIR::init(llvm::Value* sourceRaw, CodeScope* body, Allocator* allocator, const std::string& hintAlias){
	RecordIR recordIR(__context);
	- compilation::LambdaIR lambdaIR(__context.pass);
	- llvm::Function* fnTransform = lambdaIR.compile(body, hintAlias);
	+ compilation::LambdaIR lambdaIR(__context);
	+ llvm::Value* lambdaTransform = lambdaIR.compile(body, allocator, hintAlias);

	llvm::Value* resultRaw = recordIR.init({
	sourceRaw->getType(),
	- fnTransform->getFunctionType()->getPointerTo()
	+ lambdaTransform->getType()
	});

	resultRaw = __context.pass->man->llvm->irBuilder.CreateInsertValue(
	resultRaw, sourceRaw, 0);
	resultRaw = __context.pass->man->llvm->irBuilder.CreateInsertValue(
	- resultRaw, fnTransform, 1);
	+ resultRaw, lambdaTransform, 1);

	return resultRaw;
	}

	llvm::Type*
	FlyIR::getRawType(const ExpandedType& aggrT, const typehints::FlyHint& hint, LLVMLayer* llvm){
	assert(aggrT->__operator == TypeOperator::ARRAY);
	TypesHelper types(llvm);

	llvm::Type* sourceTRaw = IContainersIR::getRawTypeByHint(hint.hintSrc, aggrT, llvm);
	- llvm::Type* elTRaw = llvm->toLLVMType(ExpandedType(aggrT->__operands.at(0)));
	- llvm::Type* resultTRaw = types.getPreferredIntTy();
	+ llvm::Type* elRawT = llvm->toLLVMType(ExpandedType(aggrT->__operands.at(0)));

	- llvm::Type* fnTnsfTRaw = llvm::FunctionType::get(resultTRaw, llvm::ArrayRef<llvm::Type*>(elTRaw), false);
	+ //ERROR: !!LOST INFO ON ARG TYPE !
	+ llvm::Type* lmbdTnsfRawT = LambdaIR::getRawType(elRawT, {elRawT}, llvm);
	std::vector<llvm::Type*> fieldsVec = {
	sourceTRaw,
	- fnTnsfTRaw->getPointerTo()
	+ lmbdTnsfRawT
	};
	llvm::ArrayRef<llvm::Type *> fieldsArr(fieldsVec);
	llvm::StructType* resultTR = llvm::StructType::get(llvm->llvmContext, fieldsArr, false);

	return resultTR;
	}

	llvm::Value*
	-FlyIR::getTransformFn(llvm::Value* aggrRaw){
	+FlyIR::getTransformLambda(llvm::Value* aggrRaw){
	LLVMLayer* llvm = __context.pass->man->llvm;
	- llvm::Value* fnRaw = llvm->irBuilder.CreateExtractValue(aggrRaw, llvm::ArrayRef<unsigned>{1});
	+ llvm::Value* lambdaRaw = llvm->irBuilder.CreateExtractValue(aggrRaw, llvm::ArrayRef<unsigned>{1});

	- return fnRaw;
	+ return lambdaRaw;
	}

	llvm::Value*
	FlyIR::getSourceAggr(llvm::Value* aggrRaw){
	LLVMLayer* llvm = __context.pass->man->llvm;
	return llvm->irBuilder.CreateExtractValue(aggrRaw, llvm::ArrayRef<unsigned>{0});
	}

	llvm::Value*
	FlyIR::operatorMap(const Expression& expr, const std::string& hintAlias){
	const Expression& sourceE = expr.getOperands().at(0);
	llvm::Value* sourceRaw = __context.scope->process(sourceE);
	- CodeScope* loopS = expr.blocks.front();
	+ CodeScope* loopSc = expr.blocks.front();
	+ std::unique_ptr<Allocator> allocator(Allocator::create(expr, __context));

	- return init(sourceRaw, loopS, hintAlias);
	+ return init(sourceRaw, loopSc, allocator.get(), hintAlias);
	}

	FlyIR::FlyIR(typehints::FlyHint hint, compilation::Context context)
	: __hint(hint), __context(context){}

	IFwdIteratorIR*
	IFwdIteratorIR::createByHint(const Expression& hintE, const ExpandedType& aggrT, const compilation::Context& context){
	ImplementationType hintType = (ImplementationType) hintE.getValueDouble();

	switch(hintType){
	case SOLID:{
	ArrayIR compiler(aggrT, typehints::parse<typehints::ArrayHint>(hintE), context);
	return new FwdIteratorIR<SOLID>(compiler);
	}

	case ON_THE_FLY:{
	return new FwdIteratorIR<ON_THE_FLY>(typehints::parse<typehints::FlyHint>(hintE), aggrT, context);
	}

	case RANGE: {
	return new FwdIteratorIR<RANGE>(context);
	}

	default: break;
	}

	assert(false);
	return nullptr;
	}

	IFwdIteratorIR*
	IFwdIteratorIR::create(const Expression& aggrE, const ExpandedType& aggrT, const compilation::Context& context){
	auto manPredefined = analysis::PredefinedAnns::instance();
	const Expression& hintE = analysis::findAnnByType(
	aggrE,
	ExpandedType(manPredefined.hintsContT),
	context.pass->man->root
	);
	assert(hintE.isValid());

	return createByHint(hintE, aggrT, context);
	}

	llvm::Value*
	FwdIteratorIR<ON_THE_FLY>::begin(llvm::Value* aggrRaw) {
	std::unique_ptr<IFwdIteratorIR> itSrcIR(IFwdIteratorIR::createByHint(__hint.hintSrc, __aggrT, __context));
	FlyIR compilerFly(__hint, __context);
	llvm::Value* aggrSrcRaw = compilerFly.getSourceAggr(aggrRaw);

	return itSrcIR->begin(aggrSrcRaw);
	}

	llvm::Value*
	FwdIteratorIR<ON_THE_FLY>::end(llvm::Value* aggrRaw) {
	std::unique_ptr<IFwdIteratorIR> itSrcIR(IFwdIteratorIR::createByHint(__hint.hintSrc, __aggrT, __context));
	FlyIR compilerFly(__hint, __context);
	llvm::Value* aggrSrcRaw = compilerFly.getSourceAggr(aggrRaw);

	return itSrcIR->end(aggrSrcRaw);
	}

	llvm::Value*
	FwdIteratorIR<ON_THE_FLY>::advance(llvm::Value* idxRaw, const std::string& hintAlias){
	std::unique_ptr<IFwdIteratorIR> itSrcIR(IFwdIteratorIR::createByHint(__hint.hintSrc, __aggrT, __context));
	return itSrcIR->advance(idxRaw, hintAlias);
	}

	llvm::Value*
	FwdIteratorIR<ON_THE_FLY>::get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias){
	std::unique_ptr<IFwdIteratorIR> srcIterIR(IFwdIteratorIR::createByHint(__hint.hintSrc, __aggrT, __context));
	- FlyIR compilerFly(__hint, __context);
	- llvm::Value* aggrSrcRaw = compilerFly.getSourceAggr(aggrRaw);
	- llvm::Value* valueSrcRaw = srcIterIR->get(aggrSrcRaw, idxRaw);
	FlyIR flyIR(__hint, __context);
	- llvm::Value* fnTnsfRaw = flyIR.getTransformFn(aggrRaw);
	- llvm::Type* fnTnsfTRawRaw = llvm::cast<llvm::PointerType>(fnTnsfRaw->getType())->getElementType();
	- llvm::FunctionType* fnTnsfTRaw = llvm::cast<llvm::FunctionType>(fnTnsfTRawRaw);
	- compilation::BruteFnInvocation fnTnsfInvoc(fnTnsfRaw, fnTnsfTRaw, __context.pass->man->llvm);
	- return fnTnsfInvoc({valueSrcRaw}, hintAlias);
	+ compilation::LambdaIR lambdaIR(__context);
	+
	+ llvm::Value* aggrSrcRaw = flyIR.getSourceAggr(aggrRaw);
	+ llvm::Value* valueSrcRaw = srcIterIR->get(aggrSrcRaw, idxRaw);
	+ llvm::Value* lambdaTnsfRaw = flyIR.getTransformLambda(aggrRaw);
	+ std::unique_ptr<compilation::IFnInvocation> fnTnsfInvoc(lambdaIR.getFnInvocation(lambdaTnsfRaw));
	+
	+ return (*fnTnsfInvoc)({valueSrcRaw}, hintAlias);
	}

	llvm::Value*
	RangeIR::create(const ExpandedType& aggrT, llvm::Value* valueFromRaw, llvm::Value* valueToRaw){
	RecordIR recordIR(__context);
	LLVMLayer* llvm = __context.pass->man->llvm;

	llvm::Value* aggrRaw = recordIR.init(getRawType(aggrT, llvm));
	aggrRaw = llvm->irBuilder.CreateInsertValue(aggrRaw, valueFromRaw, 0);
	aggrRaw = llvm->irBuilder.CreateInsertValue(aggrRaw, valueToRaw, 1);

	return aggrRaw;
	}

	llvm::Value*
	RangeIR::init(const Expression& aggrE, const ExpandedType& aggrT, const std::string& hintAlias){
	assert(aggrE.op == Operator::LIST_RANGE);
	assert(aggrE.operands.size()==2);

	llvm::Value* valueFromRaw = __context.scope->process(aggrE.operands.at(0));
	llvm::Value* valueToRaw = __context.scope->process(aggrE.operands.at(1));

	return create(aggrT, valueFromRaw, valueToRaw);
	}

	llvm::Value*
	RangeIR::getValueFrom(llvm::Value* aggrRaw){
	LLVMLayer* llvm = __context.pass->man->llvm;
	return llvm->irBuilder.CreateExtractValue(aggrRaw, llvm::ArrayRef<unsigned>{0});
	}

	llvm::Value*
	RangeIR::getValueTo(llvm::Value* aggrRaw){
	LLVMLayer* llvm = __context.pass->man->llvm;
	return llvm->irBuilder.CreateExtractValue(aggrRaw, llvm::ArrayRef<unsigned>{1});
	}

	llvm::StructType*
	RangeIR::getRawType(const ExpandedType& aggrT, LLVMLayer* llvm){
	assert(aggrT->__operator == TypeOperator::ARRAY);

	ExpandedType elT(aggrT->__operands.at(0));
	llvm::Type* elRawT = llvm->toLLVMType(elT);

	std::vector<llvm::Type*> fieldsVec = {elRawT, elRawT};
	llvm::ArrayRef<llvm::Type *> fieldsArr(fieldsVec);
	llvm::StructType* rangeRawT = llvm::StructType::get(llvm->llvmContext, fieldsArr, false);

	return rangeRawT;
	}

	llvm::Value*
	FwdIteratorIR<RANGE>::begin(llvm::Value* aggrRaw){
	RangeIR compiler(__context);
	return compiler.getValueFrom(aggrRaw);
	}

	llvm::Value*
	FwdIteratorIR<RANGE>::end(llvm::Value* aggrRaw){
	RangeIR compiler(__context);
	return compiler.getValueTo(aggrRaw);
	}

	llvm::Value*
	FwdIteratorIR<RANGE>::get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias){
	return idxRaw;
	}

	llvm::Value*
	FwdIteratorIR<RANGE>::advance(llvm::Value* idxRaw, const std::string& hintAlias) {
	LLVMLayer* llvm = __context.pass->man->llvm;
	TypesHelper types(llvm);
	llvm::Type* intT = types.getPreferredIntTy();

	return llvm->irBuilder.CreateAdd(idxRaw, llvm::ConstantInt::get(intT, 1), hintAlias);
	}

	}} //end of xreate::containers
	diff --git a/cpp/src/compilation/containers.h b/cpp/src/compilation/containers.h
	index 1c919ed..d942330 100644
	--- a/cpp/src/compilation/containers.h
	+++ b/cpp/src/compilation/containers.h
	@@ -1,141 +1,148 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: containers.h
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	#ifndef CODEINSTRUCTIONS_H
	#define CODEINSTRUCTIONS_H

	#include "ast.h"

	#include "llvmlayer.h"
	#include "pass/compilepass.h"
	#include "compilation/control.h"
	#include "query/containers.h"
	#include "analysis/typehints.h"
	+#include "mm.h"
	+
	+namespace xreate {namespace compilation {
	+ class Allocator;
	+}};

	namespace xreate { namespace containers {

	class IFwdIteratorIR;

	class IContainersIR{
	public:
	static IContainersIR *create(
	const Expression &aggrE,
	const TypeAnnotation &expectedT,
	const compilation::Context &context);
	virtual ~IContainersIR(){}

	static ImplementationType getImplementation(const Expression& aggrE, AST* ast);
	static llvm::Type* getRawType(const Expression& aggrE, const ExpandedType& aggrT, LLVMLayer* llvm);
	static llvm::Type* getRawTypeByHint(const Expression& hintE, const ExpandedType& aggrT, LLVMLayer* llvm);
	- virtual IFwdIteratorIR* getFwdIterator() = 0;
	+ static uint64_t getAllocSize(const Expression& aggrE, LLVMLayer* llvm);

	- virtual llvm::Value *init(const std::string &hintAlias = "") = 0;
	+ virtual IFwdIteratorIR* getFwdIterator() = 0;
	+ virtual llvm::Value init(compilation::Allocator allocator, const std::string &hintAlias = "") = 0;
	virtual llvm::Value update(llvm::Value aggrRaw, const Expression &updE, const std::string &hintAlias) = 0;
	virtual llvm::Value* keys(llvm::Value* aggrRaw, const std::string &hintAlias = "") { return nullptr; }
	};

	class RecordIR{
	public:
	RecordIR(const compilation::Context& context): __context(context){}
	llvm::Value* init(llvm::StructType* tyAggr);
	llvm::Value* init(std::forward_list<llvm::Type*> fields);
	- llvm::Value* update(llvm::Value* aggrRaw, const ExpandedType& aggrT, const Expression& updE);
	+ llvm::Value* update(llvm::Value* aggrRaw, const ExpandedType& aggrT, const Expression& updE, const std::string& hintAlias);

	private:
	compilation::Context __context;
	};

	/**
	* \brief A factory to create a concrete iterator based on the solution provided by xreate::containers::Query
	* \sa xreate::containers::Query
	*/
	class IFwdIteratorIR{
	public :
	virtual ~IFwdIteratorIR(){};

	virtual llvm::Value* begin(llvm::Value* aggrRaw) = 0;
	virtual llvm::Value* end(llvm::Value* aggrRaw) = 0;
	virtual llvm::Value* get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias="") = 0;
	virtual llvm::Value* advance(llvm::Value* idxRaw, const std::string& hintAlias="") = 0;

	static IFwdIteratorIR* create(const Expression& aggrE, const ExpandedType& aggrT, const compilation::Context& context);
	static IFwdIteratorIR* createByHint(const Expression& hintE, const ExpandedType& aggrT, const compilation::Context& context);
	};

	template<ImplementationType I>
	class FwdIteratorIR;

	class FlyIR{
	public:
	FlyIR(typehints::FlyHint hint, compilation::Context context);

	- llvm::Value* init(llvm::Value* sourceRaw, CodeScope* body, const std::string& hintAlias);
	+ llvm::Value* init(llvm::Value* sourceRaw, CodeScope* body, compilation::Allocator* allocator, const std::string& hintAlias);
	llvm::Value* getSourceAggr(llvm::Value* aggrRaw);
	- llvm::Value* getTransformFn(llvm::Value* aggrRaw);
	+ llvm::Value* getTransformLambda(llvm::Value* aggrRaw);
	llvm::Value* operatorMap(const Expression& expr, const std::string& hintAlias);
	static llvm::Type getRawType(const ExpandedType& aggrT, const typehints::FlyHint& hint, LLVMLayer llvm);
	+ static uint64_t getAllocSize(const Expression& expr, LLVMLayer* llvm);

	private:
	typehints::FlyHint __hint;
	compilation::Context __context;
	};

	/** \brief The lazy container implementation.
	*
	* Represents computation on the fly.
	* \sa xreate::containers::IFwdIteratorIR, \sa xreate::containers::Query
	*/
	template<>
	class FwdIteratorIR<ON_THE_FLY> : public IFwdIteratorIR {
	public:
	FwdIteratorIR<ON_THE_FLY>(typehints::FlyHint hint, const ExpandedType &aggrT, compilation::Context context)
	: __aggrT(aggrT), __hint(hint), __context(context){}

	virtual llvm::Value* begin(llvm::Value* aggrRaw) override;
	virtual llvm::Value* end(llvm::Value* aggrRaw) override;
	virtual llvm::Value* get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias="") override;
	virtual llvm::Value* advance(llvm::Value* idxRaw, const std::string& hintAlias="") override;

	private:
	ExpandedType __aggrT;
	typehints::FlyHint __hint;
	compilation::Context __context;
	};

	class RangeIR{
	public:
	RangeIR(const compilation::Context& ctx): __context(ctx){}
	llvm::Value* getValueFrom(llvm::Value* aggrRaw);
	llvm::Value* getValueTo(llvm::Value* aggrRaw);
	static llvm::StructType* getRawType(const ExpandedType& aggrT, LLVMLayer* llvm);
	llvm::Value* init(const Expression& aggrE, const ExpandedType& aggrT, const std::string& hintAlias="");
	llvm::Value* create(const ExpandedType& aggrT, llvm::Value* valueFromRaw, llvm::Value* valueToRaw);

	private:
	compilation::Context __context;
	};

	template<>
	class FwdIteratorIR<RANGE>: public IFwdIteratorIR {
	public:
	FwdIteratorIR<RANGE>(compilation::Context ctx): __context(ctx){}

	virtual llvm::Value* begin(llvm::Value* aggrRaw) override;
	virtual llvm::Value* end(llvm::Value* aggrRaw) override;
	virtual llvm::Value* get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias="") override;
	virtual llvm::Value* advance(llvm::Value* idxRaw, const std::string& hintAlias="") override;

	private:
	compilation::Context __context;
	};

	}} //end of xreate::containers



	#endif //CODEINSTRUCTIONS_H
	diff --git a/cpp/src/compilation/containers/arrays.cpp b/cpp/src/compilation/containers/arrays.cpp
	index 5cd0ce7..3d94bf0 100644
	--- a/cpp/src/compilation/containers/arrays.cpp
	+++ b/cpp/src/compilation/containers/arrays.cpp
	@@ -1,179 +1,185 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: arrays.cpp
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created in March 2020.
	*/

	#include "compilation/containers/arrays.h"
	#include "aux/expressions.h"
	+#include "compilation/mm.h"

	using namespace std;
	using namespace llvm;

	namespace xreate { namespace containers{

	llvm::PointerType*
	ArrayIR::getRawType(const ExpandedType& aggrT, const typehints::ArrayHint& hint, LLVMLayer* llvm){
	assert(aggrT->__operator == TypeOperator::ARRAY);
	assert(aggrT->__operands.size() == 1);
	llvm::Type* elRawT = llvm->toLLVMType(ExpandedType(aggrT->__operands.at(0)));

	return llvm::ArrayType::get(elRawT, hint.size)->getPointerTo();
	}

	+uint64_t
	+ArrayIR::getAllocSize(const ExpandedType& aggrT, const typehints::ArrayHint& hint, LLVMLayer* llvm){
	+ llvm::PointerType* aggrRawT = getRawType(aggrT, hint, llvm);
	+
	+ return llvm->module->getDataLayout().getTypeStoreSize(aggrRawT->getElementType());
	+}
	+
	llvm::Value*
	-ArrayIR::init(const string& hintAlias){
	+ArrayIR::init(compilation::Allocator* allocator, const string& hintAlias){
	LLVMLayer* llvm = __context.pass->man->llvm;
	TypesHelper helper(llvm);
	llvm::PointerType* aggrRawT = getRawType(__aggrT, __hint, __context.pass->man->llvm);
	-
	- //llvm::Value* aggrLengthRaw = ConstantInt::get(helper.getPreferredIntTy(), aggrInfo.size);
	- llvm::Value* aggrRaw = llvm->irBuilder.CreateAlloca(aggrRawT->getElementType(), nullptr, hintAlias);
	+ llvm::Value* aggrRaw = allocator->allocate(aggrRawT->getElementType(), nullptr, hintAlias);

	return aggrRaw;
	}

	llvm::Value*
	ArrayIR::update(llvm::Value* aggrRaw, const Expression& updE, const std::string& hintAlias) {
	LLVMLayer* llvm = __context.pass->man->llvm;
	TypesHelper helper(llvm);
	llvm::IntegerType* intT = helper.getPreferredIntTy();
	llvm::Value* idxZeroRaw = ConstantInt::get(intT, 0);
	llvm::PointerType* aggrRawT = getRawType(__aggrT, __hint, __context.pass->man->llvm);
	const TypeAnnotation& elT = __aggrT->__operands.at(0);
	//llvm::Type* elTRaw = llvm->toLLVMType(ExpandedType(aggrT->__operands.at(0)));

	for (const auto& entry: reprListAsDict(updE)){
	llvm::Value* keyRaw = __context.scope->process(entry.first);
	llvm::Value* elRaw = __context.scope->process(entry.second, "", elT);

	llvm::Value* elLoc = llvm->irBuilder.CreateGEP(
	aggrRawT->getElementType(), aggrRaw, ArrayRef<llvm::Value>(std::vector<Value>{idxZeroRaw, keyRaw}));
	llvm->irBuilder.CreateStore(elRaw, elLoc) ;
	}

	return aggrRaw;
	}

	llvm::Value*
	ArrayIR::get(llvm::Value* aggrRaw, std::vector<llvm::Value *> idxL, const std::string& hintAlias) {
	LLVMLayer* llvm = __context.pass->man->llvm;
	TypesHelper helper(llvm);
	llvm::IntegerType* intT = helper.getPreferredIntTy();
	llvm::Value* zeroRaw = ConstantInt::get(intT, 0);

	idxL.insert(idxL.begin(), zeroRaw);
	llvm::Value pEl = llvm->irBuilder.CreateGEP(aggrRaw, llvm::ArrayRef<llvm::Value >(idxL));
	return llvm->irBuilder.CreateLoad(pEl, hintAlias);
	}

	llvm::Value*
	ArrayIR::operatorMap(const Expression& expr, const std::string& hintAlias) {
	assert(false); return nullptr;
	//EXPAND_CONTEXT UNUSED(scope);

	// //initializationcompileListAsSolidArray
	// Symbol symbolIn = Attachments::get<IdentifierSymbol>(expr.getOperands()[0]);
	//
	// ImplementationRec<SOLID> implIn = containers::Query::queryImplementation(symbolIn).extract<SOLID>(); // impl of input list
	// size_t size = implIn.size;
	// CodeScope* scopeLoop = expr.blocks.front();
	// std::string varEl = scopeLoop->__bindings[0];
	//
	// IFwdIteratorIR* it = IFwdIteratorIR::create(context, symbolIn);
	// llvm::Value *rangeFrom = it->begin();
	// llvm::Value *rangeTo = it->end();
	//
	// //definitions
	// ArrayType* tyNumArray = nullptr; //(ArrayType*) (llvm->toLLVMType(ExpandedType(TypeAnnotation(tag_array, TypePrimitive::Int, size))));
	// llvm::IRBuilder<> &builder = llvm->irBuilder;
	//
	// llvm::BasicBlock *blockLoop = llvm::BasicBlock::Create(llvm->llvmContext, "loop", function->raw);
	// llvm::BasicBlock *blockBeforeLoop = builder.GetInsertBlock();
	// llvm::BasicBlock *blockAfterLoop = llvm::BasicBlock::Create(llvm->llvmContext, "postloop", function->raw);
	// Value* dataOut = llvm->irBuilder.CreateAlloca(tyNumArray, ConstantInt::get(tyNum, size), NAME("map"));
	//
	// // * initial check
	// Value* condBefore = builder.CreateICmpSLE(rangeFrom, rangeTo);
	// builder.CreateCondBr(condBefore, blockLoop, blockAfterLoop);
	//
	// // create PHI:
	// builder.SetInsertPoint(blockLoop);
	// llvm::PHINode *stateLoop = builder.CreatePHI(tyNum, 2, "mapIt");
	// stateLoop->addIncoming(rangeFrom, blockBeforeLoop);
	//
	// // loop body:
	// Value* elIn = it->get(stateLoop, varEl);
	// compilation::IBruteScope* scopeLoopUnit = function->getBruteScope(scopeLoop);
	// scopeLoopUnit->bindArg(elIn, move(varEl));
	// Value* elOut = scopeLoopUnit->compile();
	// Value pElOut = builder.CreateGEP(dataOut, ArrayRef<Value >(std::vector<Value*>{ConstantInt::get(tyNum, 0), stateLoop}));
	// builder.CreateStore(elOut, pElOut);
	//
	// //next iteration preparing
	// Value *stateLoopNext = builder.CreateAdd(stateLoop, llvm::ConstantInt::get(tyNum, 1));
	// stateLoop->addIncoming(stateLoopNext, builder.GetInsertBlock());
	//
	// //next iteration checks:
	// Value* condAfter = builder.CreateICmpSLE(stateLoopNext, rangeTo);
	// builder.CreateCondBr(condAfter, blockLoop, blockAfterLoop);
	//
	// //finalization:
	// builder.SetInsertPoint(blockAfterLoop);
	//
	// return dataOut;
	}

	llvm::Value*
	ArrayIR::keys(llvm::Value* aggrRaw, const std::string &hintAlias){
	TypesHelper helper(__context.pass->man->llvm);
	RangeIR compiler(__context);

	llvm::Type* intRawT = helper.getPreferredIntTy();
	llvm::Value* keyBeginRaw = llvm::ConstantInt::get(intRawT, 0);
	llvm::Value* keyEndRaw = llvm::ConstantInt::get(intRawT, __hint.size);

	return compiler.create(__aggrT, keyBeginRaw, keyEndRaw);
	}

	IFwdIteratorIR* ArrayIR::getFwdIterator(){
	return new FwdIteratorIR<SOLID>(*this);
	}

	llvm::Value *
	FwdIteratorIR<SOLID>::begin(llvm::Value* aggrRaw){
	TypesHelper helper(__compiler.__context.pass->man->llvm);
	llvm::IntegerType* intT = helper.getPreferredIntTy();

	return llvm::ConstantInt::get(intT, 0);
	}

	llvm::Value *
	FwdIteratorIR<SOLID>::end(llvm::Value* aggrRaw){
	TypesHelper helper(__compiler.__context.pass->man->llvm);
	llvm::IntegerType* intT = helper.getPreferredIntTy();
	size_t size = __compiler.__hint.size;

	return llvm::ConstantInt::get(intT, size);
	}

	llvm::Value *
	FwdIteratorIR<SOLID>::get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias){
	return __compiler.get(aggrRaw, {idxRaw}, hintAlias);
	}

	llvm::Value *
	FwdIteratorIR<SOLID>::advance(llvm::Value *idxRaw, const std::string &hintAlias){
	LLVMLayer* llvm = __compiler.__context.pass->man->llvm;
	TypesHelper helper(llvm);
	llvm::IntegerType* intT = helper.getPreferredIntTy();
	llvm::Value* cnstOneRaw = llvm::ConstantInt::get(intT, 1);

	return llvm->irBuilder.CreateAdd(idxRaw, cnstOneRaw, hintAlias);
	}

	}} //xreate::containers
	\ No newline at end of file
	diff --git a/cpp/src/compilation/containers/arrays.h b/cpp/src/compilation/containers/arrays.h
	index 77c6586..d4919cb 100644
	--- a/cpp/src/compilation/containers/arrays.h
	+++ b/cpp/src/compilation/containers/arrays.h
	@@ -1,65 +1,66 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: arrays.h
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created in March 2020.
	*/

	#ifndef XREATE_ARRAYSIR_H
	#define XREATE_ARRAYSIR_H

	#include "compilation/containers.h"

	namespace xreate { namespace containers{

	class IFwdIteratorIR;

	/** \brief The contiguous container implementation.
	*
	* Represents contiguous in memory(array) implementation.
	* \sa xreate::containers::IFwdIteratorIR, \sa xreate::containers::Query
	*/
	class ArrayIR : public IContainersIR{
	friend class FwdIteratorIR<SOLID>;

	public:
	ArrayIR(const ExpandedType &aggrT, const typehints::ArrayHint &hints, const compilation::Context &context)
	: __context(context), __aggrT(aggrT), __hint(hints){}

	- virtual llvm::Value *init(const std::string &hintAlias = "") override;
	+ virtual llvm::Value init(compilation::Allocator allocator, const std::string &hintAlias = "") override;
	virtual llvm::Value update(llvm::Value aggrRaw, const Expression &updE, const std::string &hintAlias) override;
	virtual llvm::Value* keys(llvm::Value* aggrRaw, const std::string &hintAlias = "") override;

	llvm::Value get(llvm::Value aggrRaw, std::vector<llvm::Value *> idxL, const std::string &hintAlias);
	virtual IFwdIteratorIR* getFwdIterator() override;
	static llvm::PointerType getRawType(const ExpandedType& aggrT, const typehints::ArrayHint& hint, LLVMLayer llvm);
	+ static uint64_t getAllocSize(const ExpandedType& aggrT, const typehints::ArrayHint& hint, LLVMLayer* llvm);

	/** \brief `loop map` statement compilation*/
	llvm::Value* operatorMap(const Expression& expr, const std::string& hintAlias);

	private:
	compilation::Context __context;
	ExpandedType __aggrT;
	typehints::ArrayHint __hint;
	};

	template<>
	class FwdIteratorIR<SOLID>: public IFwdIteratorIR {
	public:
	FwdIteratorIR(const ArrayIR& arraysIR): __compiler(arraysIR) {};

	virtual llvm::Value* begin(llvm::Value* aggrRaw) override;
	virtual llvm::Value* end(llvm::Value* aggrRaw) override;
	virtual llvm::Value* get(llvm::Value* aggrRaw, llvm::Value *idxRaw, const std::string &hintAlias="") override;
	virtual llvm::Value* advance(llvm::Value* idxRaw, const std::string& hintAlias="") override;

	private:
	ArrayIR __compiler;
	};

	}} // xreate::containers

	#endif //XREATE_ARRAYSIR_H
	diff --git a/cpp/src/compilation/context.cpp b/cpp/src/compilation/context.cpp
	new file mode 100644
	index 0000000..db5aa1d
	--- /dev/null
	+++ b/cpp/src/compilation/context.cpp
	@@ -0,0 +1,64 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: context.cpp
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 25/05/2020
	+ */
	+
	+#include "query/contextalloc.h"
	+#include "compilation/context.h"
	+#include "llvmlayer.h"
	+#include "llvm/IR/GlobalVariable.h"
	+
	+namespace xreate { namespace compilation{
	+
	+AllocContext*
	+ContextManager::getContext(const std::string& id){
	+ if(__contexts.count(id)) return __contexts.at(id);
	+
	+ AllocContext* context = new AllocContext(id, this, nullptr);
	+ __contexts.emplace(id, context);
	+ return context;
	+}
	+
	+void
	+AllocContext::set(const ASTSite& varS, llvm::Value* varRaw){
	+ LLVMLayer* llvm = __man->__pass->man->llvm;
	+ GlobalContextTable* tableGlobal = __man->__pass->getGlobalContextTable();
	+
	+ llvm::Value* varStorage = tableGlobal->getVariable(varS);
	+ llvm->irBuilder.CreateStore(varRaw, varStorage);
	+}
	+
	+llvm::Value*
	+AllocContext::get(const ASTSite& varS){
	+ LLVMLayer* llvm = __man->__pass->man->llvm;
	+ GlobalContextTable* tableGlobal = __man->__pass->getGlobalContextTable();
	+
	+ llvm::Value* varStorage = tableGlobal->getVariable(varS);
	+ return llvm->irBuilder.CreateLoad(varStorage);
	+}
	+
	+void
	+GlobalContextTable::compile(){
	+ LLVMLayer* llvm = __pass->man->llvm;
	+ TranscendLayer* transcend = __pass->man->transcend;
	+ ContextAllocQuery* query = dynamic_cast<ContextAllocQuery*>(transcend->getQuery(QueryId::ContextAllocQuery));
	+ llvm::Type* int8PT = llvm::PointerType::getInt8PtrTy(llvm->llvmContext);
	+
	+ ContextAllocQuery::Model model = query->getModel();
	+ for(const auto& entry: model){
	+ llvm::GlobalVariable* varRaw = new llvm::GlobalVariable(
	+ *(llvm->module.get()), int8PT, false,
	+ llvm::GlobalValue::PrivateLinkage,
	+ llvm::UndefValue::get(int8PT)
	+ );
	+
	+ __table.emplace(entry.second, varRaw);
	+ }
	+}
	+
	+}} // xreate::compilation
	\ No newline at end of file
	diff --git a/cpp/src/compilation/context.h b/cpp/src/compilation/context.h
	new file mode 100644
	index 0000000..a7d1cf5
	--- /dev/null
	+++ b/cpp/src/compilation/context.h
	@@ -0,0 +1,61 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: context.h
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 25/05/2020
	+ */
	+#ifndef XREATE_CONTEXT_H
	+#define XREATE_CONTEXT_H
	+
	+#include "ast.h"
	+#include "pass/compilepass.h"
	+
	+namespace llvm {
	+ class Value;
	+ class GlobalVariable;
	+}
	+
	+namespace xreate { namespace compilation{
	+class AllocContext {
	+public:
	+ AllocContext(std::string id, ContextManager* man, AllocContext* parent)
	+ : __id(id), __man(man), __parent(parent){}
	+
	+ void set(const ASTSite& varS, llvm::Value* varRaw);
	+ llvm::Value* get(const ASTSite& varS);
	+
	+private:
	+ std::string __id;
	+ ContextManager* __man;
	+ AllocContext* __parent;
	+};
	+
	+class ContextManager{
	+ friend class AllocContext;
	+
	+public:
	+ ContextManager(CompilePass* pass): __pass(pass){};
	+ AllocContext* getContext(const std::string& id);
	+
	+private:
	+ std::map<std::string, AllocContext*> __contexts;
	+ CompilePass* __pass;
	+};
	+
	+class GlobalContextTable{
	+public:
	+ GlobalContextTable(CompilePass* pass): __pass(pass){}
	+
	+ void compile();
	+ llvm::GlobalVariable* getVariable(const ASTSite& site){return __table.at(site);}
	+
	+private:
	+ CompilePass* __pass;
	+ std::map<ASTSite, llvm::GlobalVariable*> __table;
	+};
	+
	+}} // xreate::compilation
	+#endif //XREATE_CONTEXT_H
	diff --git a/cpp/src/compilation/contextalloc.h b/cpp/src/compilation/contextalloc.h
	new file mode 100644
	index 0000000..c455ec3
	--- /dev/null
	+++ b/cpp/src/compilation/contextalloc.h
	@@ -0,0 +1,56 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: preallocation.h
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 08/05/2020
	+ */
	+#ifndef XREATE_PREALLOCATION_H
	+#define XREATE_PREALLOCATION_H
	+
	+#include "query/contextalloc.h"
	+#include "compilation/context.h"
	+#include "compilation/containers.h"
	+#include "compilation/resources.h"
	+
	+namespace xreate {
	+
	+template<class Parent>
	+class ContextAllocBruteFnDec: public Parent{
	+public:
	+ ContextAllocBruteFnDec(ManagedFnPtr f, CompilePass* p): Parent(f, p){}
	+
	+protected:
	+ virtual void compileProlog() override {
	+ LLVMLayer* llvm = Parent::pass->man->llvm;
	+ llvm::IRBuilder<>& builder = llvm->irBuilder;
	+ llvm::Type* int8T = llvm::Type::getInt8Ty(llvm->llvmContext);
	+ llvm::Type* int32T = llvm::Type::getInt32Ty(llvm->llvmContext);
	+ ContextAllocQuery* query = dynamic_cast<ContextAllocQuery*>(Parent::pass->man->transcend->getQuery(QueryId::ContextAllocQuery));
	+ Parent::compileProlog();
	+
	+ std::string pad = query->getContextPad(Parent::__function);
	+ const std::list<ASTSite>& symbols = query->getSymbols(pad);
	+ if (!symbols.size()) return;
	+
	+ LLVMBlockLocker locker(llvm, true);
	+ llvm::BasicBlock *blockProlog = llvm::BasicBlock::Create(
	+ llvm->llvmContext,
	+ compilation::FN_BLOCK_PREALLOC,
	+ Parent::raw,
	+ llvm->irBuilder.GetInsertBlock());
	+ builder.SetInsertPoint(blockProlog);
	+
	+ compilation::AllocContext* context = Parent::pass->getContextManager()->getContext(pad);
	+ for(ASTSite varS: symbols){
	+ const Expression& varE = varS.getDefinition();
	+ uint64_t varSize = containers::IContainersIR::getAllocSize(varE, llvm);
	+ llvm::Value* varRaw = llvm->irBuilder.CreateAlloca(int8T, llvm::ConstantInt::get(int32T, varSize));
	+ context->set(varS, varRaw);
	+ }
	+ };
	+};
	+} // xreate
	+#endif //XREATE_CONTEXTALLOC_H
	diff --git a/cpp/src/compilation/control.cpp b/cpp/src/compilation/control.cpp
	index 7780fa9..bb79410 100644
	--- a/cpp/src/compilation/control.cpp
	+++ b/cpp/src/compilation/control.cpp
	@@ -1,393 +1,394 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: control.cpp
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on June 26, 2016, 6:00 PM
	*/

	#include "analysis/typeinference.h"
	#include "compilation/control.h"
	#include "compilation/containers.h"
	#include "compilation/transformersaturation.h"

	#include "query/containers.h"
	#include "llvmlayer.h"
	#include "ast.h"

	using namespace std;
	using namespace llvm;
	using namespace xreate;
	using namespace xreate::containers;
	using namespace xreate::compilation;

	#define NAME(x) (hintRetVar.empty()? x : hintRetVar)
	#define UNUSED(x) (void)(x)
	#define EXPAND_CONTEXT \
	LLVMLayer* llvm = context.pass->man->llvm; \
	compilation::IBruteScope* scope = context.scope; \
	compilation::IBruteFunction* function = context.function;

	ControlIR::ControlIR(compilation::Context ctx)
	: context(ctx), tyNum(static_cast<llvm::IntegerType*> (ctx.pass->man->llvm->toLLVMType(ExpandedType(TypeAnnotation(TypePrimitive::Int))))) {
	}

	Value*
	-ControlIR::compileStructIndex(llvm::Value* aggregate, ExpandedType aggrT, const list<string>& indices) {
	+ControlIR::compileStructIndex(llvm::Value* aggregate, ExpandedType aggrT, const list<string>& indices, const std::string& hintAlias) {
	EXPAND_CONTEXT UNUSED(scope); UNUSED(function);
	TypesHelper types(llvm);
	llvm::Value* result = aggregate;
	assert(indices.size());

	for (const string& indexField: indices){
	const std::vector<std::string>& tyfields = types.getRecordFields(aggrT);
	unsigned idx = -1; bool flagFound = false;
	for (unsigned i = 0, size = tyfields.size(); i < size; ++i) {
	if (tyfields.at(i) == indexField) {
	idx = i; flagFound = true; break;
	}
	}

	if (flagFound){
	result = llvm->irBuilder.CreateExtractValue(result, llvm::ArrayRef<unsigned>{idx});
	aggrT = typeinference::getSubtype(aggrT, indexField);
	} else {
	assert(false && "not found required struct field");
	}
	}

	+ result->setName(hintAlias);
	return result;

	//dereference pointer
	//if (types.isPointerT(t)) {
	// llvm::Value* addr = llvm->irBuilder.CreateConstGEP2_32(nullptr, aggregate, 0, i);
	// return llvm->irBuilder.CreateLoad(addr);
	//}
	}

	llvm::Value*
	ControlIR::compileFold(const Expression& loopE, const std::string& hintAlias) {
	EXPAND_CONTEXT
	assert(loopE.op == Operator::FOLD);
	AST* ast = context.pass->man->root;


	//initialization:
	const Expression aggrE = loopE.getOperands().at(0);
	const ExpandedType& aggrT = ast->getType(aggrE);
	llvm::Value* aggrRaw = context.scope->process(aggrE);

	IFwdIteratorIR* aggrItIR = IFwdIteratorIR::create(aggrE, aggrT, context);
	llvm::Value* idxBeginRaw = aggrItIR->begin(aggrRaw);
	llvm::Value* idxEndRaw = aggrItIR->end(aggrRaw);
	ExpandedType loopT = ast->getType(loopE);
	std::string elAlias = loopE.bindings[0];
	std::string accumAlias = loopE.bindings[1];
	const Expression& accumE = loopE.getOperands().at(1);
	ExpandedType accumT = ast->getType(accumE, loopT.get());
	- llvm::Type* accumRawT = llvm->toLLVMType(accumT);
	+ llvm::Type* accumRawT = llvm->toLLVMType(accumT, accumE);
	llvm::Value* accumInitRaw = scope->process(accumE, accumAlias, accumT.get());

	llvm::BasicBlock *blockProlog = llvm::BasicBlock::Create(llvm->llvmContext, "fold_prlg", function->raw);
	llvm::BasicBlock *blockHeader = llvm::BasicBlock::Create(llvm->llvmContext, "fold_hdr", function->raw);
	llvm::BasicBlock *blockBody = llvm::BasicBlock::Create(llvm->llvmContext, "fold", function->raw);
	llvm::BasicBlock *blockFooter = llvm::BasicBlock::Create(llvm->llvmContext, "fold_ftr", function->raw);
	llvm::BasicBlock *blockEpilog = llvm::BasicBlock::Create(llvm->llvmContext, "fold_eplg", function->raw);

	std::unique_ptr<TransformerSaturation> transformerSaturation(new TransformerSaturation(blockProlog, context.pass->managerTransformations));

	//Header:
	// * create phi
	llvm->irBuilder.SetInsertPoint(blockHeader);
	llvm::PHINode *accum = llvm->irBuilder.CreatePHI(accumRawT, 2, accumAlias);
	accum->addIncoming(accumInitRaw, blockProlog);
	llvm::PHINode *idxCurrentRaw = llvm->irBuilder.CreatePHI(idxBeginRaw->getType(), 2, "foldIt");
	idxCurrentRaw->addIncoming(idxBeginRaw, blockProlog);

	// * loop checks
	Value* condRange = llvm->irBuilder.CreateICmpNE(idxCurrentRaw, idxEndRaw);
	llvm->irBuilder.CreateCondBr(condRange, blockBody, blockEpilog);

	//Body:
	llvm->irBuilder.SetInsertPoint(blockBody);
	CodeScope* scopeLoop = loopE.blocks.front();
	compilation::IBruteScope* loopUnit = function->getBruteScope(scopeLoop);
	Value* elIn = aggrItIR->get(aggrRaw, idxCurrentRaw);
	loopUnit->bindArg(accum, move(accumAlias));
	loopUnit->bindArg(elIn, move(elAlias));
	Value* accumNext = loopUnit->compile();

	// * Loop saturation checks
	bool flagSaturationTriggered = transformerSaturation->insertSaturationChecks(blockFooter, blockEpilog, context);
	llvm::BasicBlock* blockSaturation = llvm->irBuilder.GetInsertBlock();
	if (!flagSaturationTriggered){
	llvm->irBuilder.CreateBr(blockFooter);
	}

	//Footer:
	// * computing next iteration state
	llvm->irBuilder.SetInsertPoint(blockFooter);
	Value *itLoopNext = aggrItIR->advance(idxCurrentRaw);
	accum->addIncoming(accumNext, llvm->irBuilder.GetInsertBlock());
	idxCurrentRaw->addIncoming(itLoopNext, llvm->irBuilder.GetInsertBlock());
	llvm->irBuilder.CreateBr(blockHeader);

	//Prolog:
	llvm->irBuilder.SetInsertPoint(context.scope->lastBlockRaw);
	llvm->irBuilder.CreateBr(blockProlog);

	llvm->irBuilder.SetInsertPoint(blockProlog);
	llvm->irBuilder.CreateBr(blockHeader);

	// Epilog:
	llvm->irBuilder.SetInsertPoint(blockEpilog);
	if (!flagSaturationTriggered){
	return accum;
	}

	llvm::PHINode* result = llvm->irBuilder.CreatePHI(accumRawT, 2, hintAlias);
	result->addIncoming(accum, blockHeader);
	result->addIncoming(accumNext, blockSaturation);

	return result;
	}

	llvm::Value*
	ControlIR::compileFoldInf(const Expression& fold, const std::string& hintRetVar) {
	EXPAND_CONTEXT
	assert(fold.op == Operator::FOLD_INF);

	std::string accumName = fold.bindings[0];
	llvm::Value* accumInit = scope->process(fold.getOperands()[0]);

	llvm::BasicBlock *blockBeforeLoop = llvm->irBuilder.GetInsertBlock();
	llvm::BasicBlock *blockLoop = llvm::BasicBlock::Create(llvm->llvmContext, "foldinf", function->raw);
	llvm::BasicBlock *blockNext = llvm::BasicBlock::Create(llvm->llvmContext, "foldinf_next", function->raw);
	llvm::BasicBlock *blockAfterLoop = llvm::BasicBlock::Create(llvm->llvmContext, "foldinf_post", function->raw);
	std::unique_ptr<TransformerSaturation> transformerSaturation(new TransformerSaturation(blockBeforeLoop, context.pass->managerTransformations));

	llvm->irBuilder.CreateBr(blockLoop);

	// * create phi
	llvm->irBuilder.SetInsertPoint(blockLoop);
	llvm::PHINode *accum = llvm->irBuilder.CreatePHI(accumInit->getType(), 2, accumName);
	accum->addIncoming(accumInit, blockBeforeLoop);

	// * loop body
	CodeScope* scopeLoop = fold.blocks.front();
	compilation::IBruteScope* unitLoop = function->getBruteScope(scopeLoop);
	unitLoop->bindArg(accum, move(accumName));
	Value* accumNext = unitLoop->compile();

	// * Loop saturation checks
	bool flagSaturationTriggered = transformerSaturation->insertSaturationChecks(blockNext, blockAfterLoop, context);
	assert(flagSaturationTriggered);

	// * computing next iteration state
	llvm->irBuilder.SetInsertPoint(blockNext);
	accum->addIncoming(accumNext, llvm->irBuilder.GetInsertBlock());
	llvm->irBuilder.CreateBr(blockLoop);

	// finalization:
	llvm->irBuilder.SetInsertPoint(blockAfterLoop);
	return accumNext;
	}

	llvm::Value*
	ControlIR::compileIf(const Expression& exprIf, const std::string& hintRetVar) {
	EXPAND_CONTEXT

	const Expression& condExpr = exprIf.getOperands()[0];
	llvm::IRBuilder<>& builder = llvm->irBuilder;
	assert(builder.GetInsertBlock() == scope->lastBlockRaw);

	//initialization:
	llvm::BasicBlock *blockEpilog = llvm::BasicBlock::Create(llvm->llvmContext, "ifAfter", function->raw);
	llvm::BasicBlock *blockTrue = llvm::BasicBlock::Create(llvm->llvmContext, "ifTrue", function->raw);
	llvm::BasicBlock *blockFalse = llvm::BasicBlock::Create(llvm->llvmContext, "ifFalse", function->raw);

	llvm::Value* cond = scope->process(condExpr);

	builder.SetInsertPoint(blockTrue);
	CodeScope* scopeTrue = exprIf.blocks.front();
	llvm::Value* resultTrue = function->getBruteScope(scopeTrue)->compile();
	llvm::BasicBlock * blockTrueEnd = builder.GetInsertBlock();
	builder.CreateBr(blockEpilog);

	builder.SetInsertPoint(blockFalse);
	CodeScope* scopeFalse = exprIf.blocks.back();
	llvm::Value* resultFalse = function->getBruteScope(scopeFalse)->compile();
	llvm::BasicBlock * blockFalseEnd = builder.GetInsertBlock();
	builder.CreateBr(blockEpilog);

	builder.SetInsertPoint(scope->lastBlockRaw);
	llvm->irBuilder.CreateCondBr(cond, blockTrue, blockFalse);

	builder.SetInsertPoint(blockEpilog);
	llvm::PHINode *ret = builder.CreatePHI(resultTrue->getType(), 2, hintRetVar);

	ret->addIncoming(resultTrue, blockTrueEnd);
	ret->addIncoming(resultFalse, blockFalseEnd);

	return ret;
	}

	//TODO Switch: default variant no needed when all possible conditions are considered
	llvm::Value*
	ControlIR::compileSwitch(const Expression& exprSwitch, const std::string& hintRetVar) {
	EXPAND_CONTEXT UNUSED(function);
	AST* root = context.pass->man->root;
	llvm::IRBuilder<>& builder = llvm->irBuilder;
	assert(exprSwitch.operands.size() >= 2);
	assert(exprSwitch.operands[1].op == Operator::CASE_DEFAULT && "No default case in Switch Statement");

	int countCases = exprSwitch.operands.size() - 1;
	llvm::BasicBlock* blockProlog = builder.GetInsertBlock();
	llvm::BasicBlock *blockEpilog = llvm::BasicBlock::Create(llvm->llvmContext, "switchAfter", function->raw);
	builder.SetInsertPoint(blockEpilog);
	llvm::Type* exprSwitchType = llvm->toLLVMType(root->getType(exprSwitch));
	llvm::PHINode *ret = builder.CreatePHI(exprSwitchType, countCases, hintRetVar);
	llvm::Type* typI8 = llvm::Type::getInt8Ty(llvm->llvmContext);

	builder.SetInsertPoint(blockProlog);
	llvm::Value * conditionSwitch = scope->process(exprSwitch.operands[0]);
	llvm::BasicBlock *blockDefault = llvm::BasicBlock::Create(llvm->llvmContext, "caseDefault", function->raw);
	llvm::SwitchInst * instructionSwitch = builder.CreateSwitch(
	typeinference::doAutomaticTypeConversion(conditionSwitch, typI8, builder),
	blockDefault,
	countCases);

	for (int size = exprSwitch.operands.size(), i = 2; i < size; ++i) {
	llvm::BasicBlock *blockCase = llvm::BasicBlock::Create(llvm->llvmContext, "case" + std::to_string(i), function->raw);

	llvm::Value* condCase = function->getBruteScope(exprSwitch.operands[i].blocks.front())->compile();
	builder.SetInsertPoint(blockCase);
	llvm::Value* resultCase = function->getBruteScope(exprSwitch.operands[i].blocks.back())->compile();
	builder.CreateBr(blockEpilog);

	ret->addIncoming(resultCase, builder.GetInsertBlock());
	builder.SetInsertPoint(blockProlog);
	instructionSwitch->addCase(
	dyn_cast<llvm::ConstantInt>(
	typeinference::doAutomaticTypeConversion(condCase, typI8, builder)),
	blockCase);
	}

	//compile default block:
	builder.SetInsertPoint(blockDefault);
	CodeScope* scopeDefault = exprSwitch.operands[1].blocks.front();
	llvm::Value* resultDefault = function->getBruteScope(scopeDefault)->compile();
	builder.CreateBr(blockEpilog);
	ret->addIncoming(resultDefault, builder.GetInsertBlock());
	builder.SetInsertPoint(blockEpilog);

	return ret;
	}

	llvm::Value*
	ControlIR::compileSwitchVariant(const Expression& exprSwitch, const std::string& hintRetVar) {
	EXPAND_CONTEXT UNUSED(function);
	AST* root = context.pass->man->root;
	llvm::IRBuilder<>& builder = llvm->irBuilder;
	llvm::Type* typI8= llvm::Type::getInt8Ty(llvm->llvmContext);
	const ExpandedType& typVariant = root->getType(exprSwitch.operands.at(0));
	llvm::Type* typVariantRaw = llvm->toLLVMType(typVariant);

	assert(typVariant->__operands.size() == exprSwitch.operands.size() - 1 && "Ill-formed Switch Variant");

	int casesCount = exprSwitch.operands.size();
	llvm::BasicBlock* blockProlog = builder.GetInsertBlock();
	llvm::BasicBlock *blockEpilog = llvm::BasicBlock::Create(llvm->llvmContext, "switchAfter", function->raw);
	builder.SetInsertPoint(blockEpilog);
	llvm::Type* resultType = llvm->toLLVMType(root->getType(exprSwitch));
	llvm::PHINode *ret = builder.CreatePHI(resultType, casesCount, hintRetVar);

	builder.SetInsertPoint(blockProlog);
	llvm::Value * conditionSwitchRaw = scope->process(exprSwitch.operands.at(0));
	llvm::Value* idRaw = builder.CreateExtractValue(conditionSwitchRaw, llvm::ArrayRef<unsigned>({0}));

	//Dereference preparation
	const bool flagPrepareDerefence = std::any_of(typVariant->__operands.begin(), typVariant->__operands.end(), [](const TypeAnnotation& op){
	return op.isValid();
	});

	llvm::Value* addrAsStorage = nullptr;
	if (flagPrepareDerefence){
	assert(exprSwitch.bindings.size() && "Switch condition alias not found");
	llvm::Type* typStorageRaw = llvm::cast<llvm::StructType>(typVariantRaw)->getElementType(1);
	llvm::Value* storageRaw = builder.CreateExtractValue(conditionSwitchRaw, llvm::ArrayRef<unsigned>({1}));
	addrAsStorage = llvm->irBuilder.CreateAlloca(typStorageRaw);
	llvm->irBuilder.CreateStore(storageRaw, addrAsStorage);
	}

	llvm::SwitchInst * instructionSwitch = builder.CreateSwitch(idRaw, nullptr, casesCount);
	llvm::BasicBlock* blockDefaultUndefined;
	std::list<CodeScope*>::const_iterator scopeCaseIt = exprSwitch.blocks.begin();
	for (int instancesSize = exprSwitch.operands.size()-1, instId = 0; instId < instancesSize; ++instId) {
	llvm::BasicBlock *blockCase = llvm::BasicBlock::Create(llvm->llvmContext, "case" + std::to_string(instId), function->raw);
	builder.SetInsertPoint(blockCase);
	IBruteScope* unitCase = function->getBruteScope(*scopeCaseIt);
	const ExpandedType& instType = ExpandedType(typVariant->__operands.at(instId));

	//Actual variant derefence
	if (instType->isValid()) {
	string identCondition = exprSwitch.bindings.front();
	llvm::Type* instTypeRaw = llvm->toLLVMType(instType);
	llvm::Value* addrAsInst = llvm->irBuilder.CreateBitOrPointerCast(addrAsStorage, instTypeRaw->getPointerTo());
	llvm::Value* instRaw = llvm->irBuilder.CreateLoad(instTypeRaw, addrAsInst);
	const Symbol& identSymb = unitCase->bindArg(instRaw, move(identCondition));
	Attachments::put<TypeInferred>(identSymb, instType);
	}

	llvm::Value* resultCase = function->getBruteScope(*scopeCaseIt)->compile();
	builder.CreateBr(blockEpilog);

	ret->addIncoming(resultCase, blockDefaultUndefined = builder.GetInsertBlock());
	builder.SetInsertPoint(blockProlog);
	instructionSwitch->addCase(dyn_cast<llvm::ConstantInt>(llvm::ConstantInt::get(typI8, exprSwitch.operands.at(instId+1).getValueDouble())), blockCase);
	++scopeCaseIt;
	}

	instructionSwitch->setDefaultDest(blockDefaultUndefined);
	builder.SetInsertPoint(blockEpilog);
	return ret;
	}

	llvm::Value*
	ControlIR::compileConstantStringAsPChar(const string& data, const std::string& hintRetVar) {
	EXPAND_CONTEXT UNUSED(function); UNUSED(scope);

	Type* typPchar = PointerType::getUnqual(Type::getInt8Ty(llvm->llvmContext));
	//ArrayType* typStr = (ArrayType*) (llvm->toLLVMType(ExpandedType(TypeAnnotation(tag_array, TypePrimitive::I8, size+1))));

	/*
	std::vector<Constant *> chars;
	chars.reserve(size+1);

	for (size_t i=0; i< size; ++i){
	chars[i] = ConstantInt::get(typI8, (unsigned char) data[i]);
	}
	chars[size] = ConstantInt::get(typI8, 0);
	*/

	Value* rawData = ConstantDataArray::getString(llvm->llvmContext, data);
	Value* rawPtrData = llvm->irBuilder.CreateAlloca(rawData->getType(), ConstantInt::get(Type::getInt32Ty(llvm->llvmContext), 1, false));
	llvm->irBuilder.CreateStore(rawData, rawPtrData);
	return llvm->irBuilder.CreateCast(llvm::Instruction::BitCast, rawPtrData, typPchar, hintRetVar);
	}

	llvm::Value*
	ControlIR::compileSequence(const Expression &expr){
	EXPAND_CONTEXT UNUSED(scope); UNUSED(llvm);

	llvm::Value* result;
	for(CodeScope* scope: expr.blocks){
	result = function->getBruteScope(scope)->compile();
	}

	return result;
	}


	diff --git a/cpp/src/compilation/control.h b/cpp/src/compilation/control.h
	index d4b3e7d..4b29e37 100644
	--- a/cpp/src/compilation/control.h
	+++ b/cpp/src/compilation/control.h
	@@ -1,73 +1,73 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: Control.h
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on June 26, 2016, 6:00 PM
	*/

	/**
	* \file advancedinstructions.h
	* \brief Compound statements compilation
	*/

	#ifndef INSTRUCTIONSADVANCED_H
	#define INSTRUCTIONSADVANCED_H

	#include "ast.h"
	#include "llvmlayer.h"
	#include "pass/compilepass.h"

	#include <vector>

	namespace xreate {
	namespace compilation {

	/** \brief Advanced compilation primitives */
	class ControlIR {
	public:
	ControlIR(compilation::Context ctx);

	/** \brief Struct field access operator compilation*/
	- llvm::Value* compileStructIndex(llvm::Value* aggregate, ExpandedType aggrT, const std::list<std::string>& indices);
	+ llvm::Value* compileStructIndex(llvm::Value* aggregate, ExpandedType aggrT, const std::list<std::string>& indices, const std::string& hintAlias);
	/*
	* - map Computation -> Llvm_Array: Prohibited, we do not know a result size
	* - map Llvm_Array -> Computation: considered in `compileGetElement`
	* - map Llvm_Array -> Llvm_Array considered by this method
	*/

	/** \brief `loop map` statement compilation*/
	llvm::Value* compileMapSolidOutput(const Expression &expr, const std::string hintRetVar = "");

	/** \brief `loop fold` statement compilation*/
	llvm::Value* compileFold(const Expression& loopE, const std::string& hintAlias="");

	/** \brief `loop` statement compilation*/
	llvm::Value* compileFoldInf(const Expression& fold, const std::string& ident="");

	/** \brief `if` statement compilation*/
	llvm::Value* compileIf(const Expression& exprIf, const std::string& ident);

	/** \brief `switch` statement compilation*/
	llvm::Value* compileSwitch(const Expression& exprSwitch, const std::string& hintRetVar);

	/** \brief `switch` statement compilation*/
	llvm::Value* compileSwitchVariant(const Expression& exprSwitch, const std::string& hintRetVar);

	/** \brief `switch variant` statement compilation*/
	llvm::Value* compileConstantStringAsPChar(const std::string &data, const std::string& hintRetVar);

	/** \brief `seq` statement compilation */
	llvm::Value* compileSequence(const Expression &expr);

	private:
	compilation::Context context;
	llvm::IntegerType* const tyNum;
	};

	}}

	#endif /* INSTRUCTIONSADVANCED_H */

	diff --git a/cpp/src/compilation/decorators.h b/cpp/src/compilation/decorators.h
	index 61b4f65..ae6802e 100644
	--- a/cpp/src/compilation/decorators.h
	+++ b/cpp/src/compilation/decorators.h
	@@ -1,254 +1,257 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: scopedecorators.h
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created on February 24, 2017, 11:35 AM
	*/

	/**
	* \file scopedecorators.h
	* \brief Basic code block compilation xreate::compilation::IBruteScope decorators
	*/


	#ifndef SCOPEDECORATORS_H
	#define SCOPEDECORATORS_H

	#include "ast.h"
	#include "compilation/transformations.h"
	#include "analysis/typeinference.h"
	#include "compilation/demand.h"
	#include "compilation/polymorph.h"
	#include "compilation/targetinterpretation.h"
	+#include "compilation/contextalloc.h"

	#ifndef XREATE_CONFIG_MIN
	#include "compilation/versions.h"
	#include "compilation/polymorph.h"
	#endif

	#include <list>

	namespace xreate {

	class CompilePass;

	namespace compilation {

	class IBruteScope;
	class IBruteFunction;

	/**\brief Provides caching ability for code scope compilation
	* \extends xreate::compilation::IBruteScope
	*/
	template<class Parent>
	class CachedScopeDecorator: public Parent{
	typedef CachedScopeDecorator<Parent> SELF;

	public:
	CachedScopeDecorator(const CodeScope* const codeScope, IBruteFunction* f, CompilePass* compilePass): Parent(codeScope, f, compilePass){}

	Symbol
	bindArg(llvm::Value* value, std::string&& alias)
	{
	//ensure existence of an alias
	assert(Parent::scope->__identifiers.count(alias));

	//memorize new value for an alias
	ScopedSymbol id{Parent::scope->__identifiers.at(alias), versions::VERSION_NONE};
	__rawVars[id] = value;

	return Symbol{id, Parent::scope};
	}

	void
	bindArg(llvm::Value* value, const ScopedSymbol& s) override{
	__rawVars[s] = value;
	}

	void
	- bindExternalSymb(llvm::Value* value, const Symbol& s) override {
	- __rawExternals[s] = value;
	+ bindExternalArg(llvm::Value* argRaw, const Symbol& argS) override {
	+ __rawExternals[argS] = argRaw;
	}

	llvm::Value*
	- compile(const std::string& aliasBlock="") override{
	+ compile() override{
	if (__rawVars.count(ScopedSymbol::RetSymbol)){
	return __rawVars[ScopedSymbol::RetSymbol];
	}

	- return Parent::compile(aliasBlock);
	+ return Parent::compile();
	}

	llvm::Value*
	processSymbol(const Symbol& s, std::string hintRetVar) override{
	if (Parent::function->isLambda){
	SELF* self = dynamic_cast<SELF*>(Parent::function->getEntry());
	if (self->__rawExternals.count(s)){
	return self->__rawExternals.at(s);
	}
	}

	const CodeScope* scope = s.scope;
	SELF* self = dynamic_cast<SELF*>(Parent::function->getBruteScope(scope));

	if (self->__rawVars.count(s.identifier)){
	return self->__rawVars.at(s.identifier);
	}

	//Declaration could be overriden
	/*
	Expression declaration = CodeScope::getDefinition(s, true);
	if (!declaration.isDefined()){
	assert(__declarationsOverriden.count(s.identifier));
	declaration = __declarationsOverriden[s.identifier];

	} else {
	(false); //in case of binding there should be raws provided.
	}
	}
	*/

	llvm::Value* resultRaw = Parent::processSymbol(s, hintRetVar);
	self->__rawVars.emplace(s.identifier, resultRaw);
	return resultRaw;
	}

	void
	overrideDeclarations(std::list<std::pair<Symbol, Expression>> bindings){
	reset();

	for (auto entry: bindings){
	SELF* self = dynamic_cast<SELF*>(Parent::function->getBruteScope(entry.first.scope));
	assert(self == this);

	self->__declarationsOverriden.emplace(entry.first.identifier, entry.second);
	}
	}

	void registerChildScope(std::shared_ptr<IBruteScope> scope){
	__childScopes.push_back(scope);
	}

	void reset(){
	__rawVars.clear();
	__declarationsOverriden.clear();
	__childScopes.clear();
	__rawExternals.clear();
	}

	private:
	std::unordered_map<ScopedSymbol, Expression> __declarationsOverriden;
	std::unordered_map<ScopedSymbol,llvm::Value*> __rawVars;
	std::unordered_map<Symbol,llvm::Value*> __rawExternals;
	std::list<std::shared_ptr<IBruteScope>> __childScopes;
	};

	/** \brief Provides automatic type conversion
	* \extends xreate::compilation::IBruteScope
	*/
	template<class Parent>
	class TypeConversionScopeDecorator: public Parent {
	public:
	TypeConversionScopeDecorator(const CodeScope* const codeScope, IBruteFunction* f, CompilePass* compilePass): Parent(codeScope, f, compilePass){}

	llvm::Value* process(const Expression& expr, const std::string& hintVarDecl="", const TypeAnnotation& expectedT = TypeAnnotation()) override {
	llvm::Value* resultR = Parent::process(expr, hintVarDecl, expectedT);

	if(!expr.type.isValid()) {
	return resultR;
	}

	ExpandedType exprT = Parent::pass->man->root->getType(expr);
	llvm::Type* exprTR = Parent::pass->man->llvm->toLLVMType(exprT, expr);
	return typeinference::doAutomaticTypeConversion(resultR, exprTR, Parent::pass->man->llvm->irBuilder);
	}
	};

	#ifndef XREATE_CONFIG_MIN
	/**\brief The default code scope compilation implementation
	* \extends xreate::compilation::IBruteScope
	*/
	typedef
	CachedScopeDecorator<
	- TypeConversionScopeDecorator<
	- latex::LatexBruteScopeDecorator<
	- polymorph::PolymorphBruteScopeDecorator<
	- compilation::TransformationsScopeDecorator<
	- interpretation::InterpretationScopeDecorator<
	- versions::VersionsScopeDecorator<
	- compilation::BasicBruteScope
	- >>>>>>>
	- DefaultCodeScopeUnit;
	+ TypeConversionScopeDecorator<
	+ latex::LatexBruteScopeDecorator<
	+ polymorph::PolymorphBruteScopeDecorator<
	+ compilation::TransformationsScopeDecorator<
	+ interpretation::InterpretationScopeDecorator<
	+ versions::VersionsScopeDecorator<
	+ compilation::BasicBruteScope >>>>>>>
	+
	+ DefaultCodeScopeUnit;

	} //end of compilation namespace

	struct CachedScopeDecoratorTag;
	struct VersionsScopeDecoratorTag;

	template<>
	struct DecoratorsDict<CachedScopeDecoratorTag>{
	typedef compilation::CachedScopeDecorator<
	compilation::TypeConversionScopeDecorator<
	latex::LatexBruteScopeDecorator<
	polymorph::PolymorphBruteScopeDecorator<
	compilation::TransformationsScopeDecorator<
	interpretation::InterpretationScopeDecorator<
	versions::VersionsScopeDecorator<
	compilation::BasicBruteScope
	>>>>>>>

	result;
	};

	template<>
	struct DecoratorsDict<VersionsScopeDecoratorTag>{
	typedef
	versions::VersionsScopeDecorator<
	compilation::BasicBruteScope
	>
	result;
	};

	#else
	/**\brief The default code scope compilation implementation
	* \extends xreate::compilation::IBruteScope
	*/
	typedef
	CachedScopeDecorator<
	TypeConversionScopeDecorator<
	interpretation::InterpretationScopeDecorator<
	demand::DemandBruteScopeDecorator<
	polymorph::PolymorphBruteScopeDecorator<
	compilation::BasicBruteScope
	>>>>>
	DefaultCodeScopeUnit;

	} //end of compilation namespacef

	struct CachedScopeDecoratorTag;

	template<>
	struct DecoratorsDict<CachedScopeDecoratorTag>{
	typedef compilation::CachedScopeDecorator<
	compilation::TypeConversionScopeDecorator<
	interpretation::InterpretationScopeDecorator<
	demand::DemandBruteScopeDecorator<
	polymorph::PolymorphBruteScopeDecorator<
	compilation::BasicBruteScope
	>>>>>
	result;
	};

	typedef
	demand::DemandBruteFnDecorator<
	//polymorph::PolymorphBruteFnDecorator<
	+ ContextAllocBruteFnDec<
	compilation::BasicBruteFunction
	- > BruteFunctionDefault;
	+ >>
	+ BruteFunctionDefault;
	#endif
	} //end of xreate

	#endif /* SCOPEDECORATORS_H */

	diff --git a/cpp/src/compilation/intrinsics.cpp b/cpp/src/compilation/intrinsics.cpp
	index 1ca85b6..004229c 100644
	--- a/cpp/src/compilation/intrinsics.cpp
	+++ b/cpp/src/compilation/intrinsics.cpp
	@@ -1,75 +1,74 @@
	//March 2020

	#include "compilation/intrinsics.h"
	#include "compilation/containers.h"
	#include "analysis/utils.h"
	#include "llvmlayer.h"

	using namespace std;

	namespace xreate{ namespace compilation{

	llvm::Value*
	IntrinsicCompiler::compile(const Expression& e, const Context& context, const std::string& hintAlias){
	switch ((IntrinsicFn) e.getValueDouble()){
	case IntrinsicFn::ARR_INIT:{
	return nullptr;
	// const ExpandedType& typAggr = context.pass->man->root->getType(e);
	// llvm::Type* typAggrRaw = context.pass->man->llvm->toLLVMType(typAggr);
	// llvm::Value* lengthRaw = context.scope->process(e.operands.at(0));
	//
	// ContainerInst engine(context);
	// return engine.array_init(lengthRaw, typAggrRaw);
	}

	case IntrinsicFn::CON_KEYS:
	return con_keys(e, context, hintAlias);

	default: break;
	}

	assert(false);
	return nullptr;
	}

	Expression
	IntrinsicCompiler::interpret(const Expression& e){
	switch ((IntrinsicFn) e.getValueDouble()){
	case IntrinsicFn::REC_FIELDS: {
	return rec_fields(e);
	}
	default: break;
	}

	assert(false);
	return Expression();
	}

	Expression
	IntrinsicCompiler::rec_fields(const Expression& e){
	TypesHelper helper(__man->llvm);
	assert(e.operands.size() == 1);

	const Expression argTypeE = e.operands.at(0);
	assert(argTypeE.__state == Expression::STRING);
	const string& argTypeS = argTypeE.getValueString();
	const ExpandedType argTypeT = __man->root->findType(argTypeS);

	const auto& fields = helper.getRecordFields(argTypeT);
	return analysis::representVecStr(fields);
	}

	llvm::Value*
	IntrinsicCompiler::con_keys(const Expression& e, const Context& context, const std::string& hintAlias){
	const Expression& aggrE = e.operands.at(0);
	const ExpandedType& aggrT = context.pass->man->root->getType(aggrE);
	llvm::Value* aggrRaw = context.scope->process(aggrE);

	std::unique_ptr<containers::IContainersIR> compiler(containers::IContainersIR::create(
	aggrE, aggrT.get(), context
	));

	return compiler->keys(aggrRaw, hintAlias);
	}
	-
	}}
	\ No newline at end of file
	diff --git a/cpp/src/compilation/lambdas.cpp b/cpp/src/compilation/lambdas.cpp
	index 0bed041..0572549 100644
	--- a/cpp/src/compilation/lambdas.cpp
	+++ b/cpp/src/compilation/lambdas.cpp
	@@ -1,71 +1,223 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: lambdas.cpp
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created in April, 2020
	*/

	#include "compilation/lambdas.h"
	+#include "compilation/containers.h"
	#include "llvmlayer.h"
	#include "compilation/resources.h"
	+#include <llvm/Support/raw_ostream.h>

	using namespace xreate::compilation;
	using namespace std;

	-unsigned LambdaBruteFn::__counter = 0;
	+unsigned LambdaFn::__counter = 0;

	std::string
	-LambdaBruteFn::prepareName(){
	+LambdaFn::prepareName(){
	return string(LAMBDA_PREFIX) + "_" + __hintAlias + "_" + to_string(__counter++);
	}

	std::vector<llvm::Type*>
	-LambdaBruteFn::prepareSignature(){
	- return getScopeSignature(IBruteFunction::__entry);
	+LambdaFn::prepareSignature(){
	+ LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	+ llvm::Type* lmbBoundArgsRawT = llvm::Type::getInt8PtrTy(llvm->llvmContext);
	+ auto result = getScopeSignature(IBruteFunction::__entry);
	+ result.push_back(lmbBoundArgsRawT);
	+
	+ return result;
	}

	llvm::Type*
	-LambdaBruteFn::prepareResult(){
	+LambdaFn::prepareResult(){
	LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	AST* ast = IBruteFunction::pass->man->root;

	return llvm->toLLVMType(ast->getType(__entry->getBody()));
	}

	llvm::Function::arg_iterator
	-LambdaBruteFn::prepareBindings(){
	+LambdaFn::prepareBindings(){
	CodeScope* entrySc = IBruteFunction::__entry;
	IBruteScope* entryBruteSc = IBruteFunction::getBruteScope(entrySc);
	llvm::Function::arg_iterator fargsI = IBruteFunction::raw->arg_begin();

	for (std::string &arg : entrySc->__bindings) {
	ScopedSymbol argid{entrySc->__identifiers[arg], versions::VERSION_NONE};

	entryBruteSc->bindArg(&*fargsI, argid);
	fargsI->setName(arg);
	++fargsI;
	}

	- for (Symbol symbExtern: entrySc->boundExternalSymbs){
	- entryBruteSc->bindExternalSymb(&*fargsI, symbExtern);
	- //fargsI->setName(arg);
	- ++fargsI;
	+ __boundArgsRaw = &*fargsI;
	+
	+ return ++fargsI;
	+}
	+
	+void
	+LambdaFn::compileProlog(){
	+ LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	+ CodeScope* entrySc = IBruteFunction::__entry;
	+ IBruteScope* entryBruteSc = IBruteFunction::getBruteScope(entrySc);
	+ TypesHelper helper(llvm);
	+ llvm::IntegerType* intT = helper.getPreferredIntTy();
	+ llvm::Value* constZero = llvm::ConstantInt::get(intT, 0);
	+
	+ LLVMBlockLocker locker(llvm, true);
	+
	+ llvm::BasicBlock *blockProlog = llvm::BasicBlock::Create(
	+ llvm->llvmContext,
	+ compilation::FN_BLOCK_PROLOG,
	+ IBruteFunction::raw,
	+ llvm->irBuilder.GetInsertBlock());
	+ llvm->irBuilder.SetInsertPoint(blockProlog);
	+
	+ llvm::StructType* boundArgsRawT = getBoundArgsRawType(entrySc, llvm);
	+ llvm::Value* boundArgsRaw2;
	+ if (entrySc->boundArgs.size()){
	+ llvm::Value* boundArgsRaw = llvm->irBuilder.CreateCast(
	+ llvm::Instruction::BitCast,
	+ __boundArgsRaw, boundArgsRawT->getPointerTo());
	+ //llvm::Value* boundArgsP = llvm->irBuilder.CreateGEP(boundArgsRaw, {constZero} /, llvm::ConstantInt::get(intT, argId++)/);
	+ boundArgsRaw2 = llvm->irBuilder.CreateLoad(boundArgsRaw);
	+ boundArgsRaw2->getType()->print(llvm::outs());
	}

	- return fargsI;
	+ unsigned argId = 0;
	+ for (Symbol symbExtern: entrySc->boundArgs){
	+ llvm::Value* argRaw = llvm->irBuilder.CreateExtractValue(boundArgsRaw2, {argId++});
	+ entryBruteSc->bindExternalArg(
	+ argRaw,
	+ symbExtern);
	+ }
	}

	void
	-LambdaBruteFn::applyAttributes(){
	+LambdaFn::applyAttributes(){
	raw->addFnAttr(llvm::Attribute::AlwaysInline);
	}

	+llvm::StructType*
	+LambdaFn::getBoundArgsRawType(CodeScope* body, LLVMLayer* llvm){
	+ std::vector<llvm::Type*> argsBoundRawTVec;
	+ argsBoundRawTVec.reserve(body->boundArgs.size());
	+
	+ for (const Symbol& argS: body->boundArgs){
	+ const Expression& argE = CodeScope::getDefinition(argS);
	+ const ExpandedType& argT = llvm->ast->getType(argE);
	+ argsBoundRawTVec.push_back(llvm->toLLVMType(argT, argE));
	+ }
	+
	+ return llvm::StructType::get(
	+ llvm->llvmContext,
	+ argsBoundRawTVec
	+ );
	+}
	+
	+llvm::Value*
	+LambdaIR::compile(CodeScope* body, Allocator* allocator, const std::string& hintAlias){
	+ LLVMLayer* llvm = __context.pass->man->llvm;
	+ containers::RecordIR recordIR(__context);
	+ LambdaFn fnLmb(body, __context.pass, hintAlias);
	+
	+ llvm::Value* fnLmbRaw = fnLmb.compile();
	+ llvm::Type* lmbBoundArgsRawT = llvm::Type::getInt8PtrTy(llvm->llvmContext);
	+ llvm::Type* lmbRawT = llvm::StructType::get(
	+ fnLmbRaw->getType(),
	+ lmbBoundArgsRawT);
	+
	+ llvm::Value* argsCastedRaw;
	+ if (body->boundArgs.size()){
	+ llvm::StructType* argsRawT = LambdaFn::getBoundArgsRawType(body, llvm);
	+ vector<llvm::Value*> argsRawVec(body->boundArgs.size());
	+ size_t boundArgIdx = 0;
	+ for (const Symbol& argBoundS: body->boundArgs){
	+ argsRawVec[boundArgIdx++] = __context.scope->processSymbol(argBoundS);
	+ }
	+
	+ llvm::Value* argsRawP = allocator->allocate(argsRawT, nullptr, "");
	+ llvm::Value* argsRaw = llvm::UndefValue::get(argsRawT);
	+ unsigned fieldId = 0;
	+ for(llvm::Value* fieldRaw: argsRawVec){
	+ argsRaw = llvm->irBuilder.CreateInsertValue(
	+ argsRaw,
	+ fieldRaw,
	+ fieldId++);
	+ }
	+
	+ llvm->irBuilder.CreateStore(argsRaw, argsRawP);
	+
	+ argsCastedRaw = llvm->irBuilder.CreateCast(
	+ llvm::Instruction::BitCast,
	+ argsRawP, llvm::Type::getInt8PtrTy(llvm->llvmContext));
	+
	+ } else {
	+ argsCastedRaw = llvm::UndefValue::get(llvm::Type::getInt8PtrTy(llvm->llvmContext));
	+ }
	+
	+ llvm::Value* lmbRaw = llvm::UndefValue::get(lmbRawT);
	+ lmbRaw = llvm->irBuilder.CreateInsertValue(lmbRaw, fnLmbRaw, 0);
	+ lmbRaw = llvm->irBuilder.CreateInsertValue(lmbRaw, argsCastedRaw, 1);
	+ lmbRaw->setName(hintAlias);
	+
	+ lmbRaw->getType()->print(llvm::outs());
	+
	+ return lmbRaw;
	+}
	+
	+uint64_t
	+LambdaIR::getAllocSize(CodeScope* body, LLVMLayer* llvm){
	+ llvm::StructType* argsRawT = LambdaFn::getBoundArgsRawType(body, llvm);
	+
	+ return llvm->module->getDataLayout().getTypeStoreSize(argsRawT);
	+}
	+
	+IFnInvocation*
	+LambdaIR::getFnInvocation(llvm::Value* lambdaRaw){
	+ LLVMLayer* llvm = __context.pass->man->llvm;
	+
	+ lambdaRaw->getType()->print(llvm::outs());
	+ llvm::StructType* lambdaStructRawT = llvm::cast<llvm::StructType>(lambdaRaw->getType());
	+ llvm::Value* calleeRaw = llvm->irBuilder.CreateExtractValue(lambdaRaw, 0);
	+
	+ calleeRaw->getType()->print(llvm::outs());
	+ llvm::Type* calleeRawPtrT = llvm::cast<llvm::PointerType>(calleeRaw->getType())->getElementType();
	+ llvm::FunctionType* calleeRawT = llvm::cast<llvm::FunctionType>(calleeRawPtrT);
	+
	+ size_t argsCount = lambdaStructRawT->getNumElements() - 1;
	+ IFnInvocation* calleeInvocBase = new BruteFnInvocation(calleeRaw, calleeRawT, llvm);
	+ vector<llvm::Value*> argsExternal(argsCount);
	+ for(unsigned argId=0; argId < argsCount; ++argId){
	+ argsExternal[argId] = llvm->irBuilder.CreateExtractValue(lambdaRaw, argId+1);
	+ }
	+
	+ return new HiddenArgsFnInvocation(argsExternal, calleeInvocBase);
	+}
	+
	llvm::Function*
	-LambdaIR::compile(CodeScope* body, const std::string& hintAlias){
	- LambdaBruteFn fnLambda(body, __pass, hintAlias);
	+LambdaIR::getRawFn(llvm::Value* lambdaRaw){
	+ LLVMLayer* llvm = __context.pass->man->llvm;
	+
	+ llvm::Value* calleeRaw = llvm->irBuilder.CreateExtractValue(lambdaRaw, 0);
	+ return llvm::cast<llvm::Function>(calleeRaw);
	+}
	+
	+llvm::Type*
	+LambdaIR::getRawType(llvm::Type* resultRawT, std::vector<llvm::Type> argsRawT, LLVMLayer llvm){
	+ llvm::Type* lmbBoundArgsRawT = llvm::Type::getInt8PtrTy(llvm->llvmContext);
	+ argsRawT.push_back(lmbBoundArgsRawT);

	- return fnLambda.compile();
	+ llvm::FunctionType* fnRawT = llvm::FunctionType::get(resultRawT, llvm::ArrayRef<llvm::Type*>(argsRawT), false);
	+ llvm::Type* lmbdRawT = llvm::StructType::get(llvm->llvmContext, {fnRawT->getPointerTo(), lmbBoundArgsRawT}, false);
	+
	+ return lmbdRawT;
	}
	+
	+
	diff --git a/cpp/src/compilation/lambdas.h b/cpp/src/compilation/lambdas.h
	index 2f3f355..1f52bee 100644
	--- a/cpp/src/compilation/lambdas.h
	+++ b/cpp/src/compilation/lambdas.h
	@@ -1,55 +1,63 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* File: lambdas.h
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* Created in April, 2020
	*/

	#ifndef XREATE_LAMBDAS_H
	#define XREATE_LAMBDAS_H

	#include "pass/compilepass.h"

	namespace llvm {
	class Function;
	}

	namespace xreate { namespace compilation {

	-class LambdaBruteFn: public IBruteFunction {
	+class Allocator;
	+
	+class LambdaFn: public IBruteFunction {
	public:
	- LambdaBruteFn(CodeScope* entry, CompilePass* p, const std::string& hintAlias)
	+ LambdaFn(CodeScope* entry, CompilePass* p, const std::string& hintAlias)
	: IBruteFunction(entry, p), __hintAlias(hintAlias) {
	IBruteFunction::isLambda = true;
	}

	virtual std::string prepareName() override;
	+ static llvm::StructType* getBoundArgsRawType(CodeScope* body, LLVMLayer* llvm);

	protected:
	virtual std::vector<llvm::Type*> prepareSignature() override;
	virtual llvm::Function::arg_iterator prepareBindings() override;
	virtual llvm::Type* prepareResult() override;
	virtual void applyAttributes() override;
	+ virtual void compileProlog() override;

	private:
	std::string __hintAlias;
	+ llvm::Value* __boundArgsRaw;
	static unsigned __counter;
	};

	class LambdaIR{
	public:
	- LambdaIR(CompilePass* p): __pass(p){}
	- llvm::Function* compile(CodeScope* body, const std::string& hintAlias);
	+ LambdaIR(compilation::Context context): __context(context){}
	+
	+ llvm::Value* compile(CodeScope* body, Allocator* allocator, const std::string& hintAlias);
	+ IFnInvocation* getFnInvocation(llvm::Value* lambdaRaw);
	+ llvm::Function* getRawFn(llvm::Value* lambdaRaw);
	+ static llvm::Type* getRawType(llvm::Type* resultRawT, std::vector<llvm::Type> argsRawT, LLVMLayer llvm);
	+ static uint64_t getAllocSize(CodeScope* body, LLVMLayer* llvm);

	private:
	compilation::Context __context;
	- CompilePass* __pass;
	-
	};

	}}

	#endif //XREATE_LAMBDAS_H
	diff --git a/cpp/src/compilation/mm.cpp b/cpp/src/compilation/mm.cpp
	new file mode 100644
	index 0000000..6470d82
	--- /dev/null
	+++ b/cpp/src/compilation/mm.cpp
	@@ -0,0 +1,67 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: ...
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 27/05/2020
	+ */
	+
	+#include "analysis/typehints.h"
	+#include "analysis/predefinedanns.h"
	+#include "analysis/utils.h"
	+#include "query/contextalloc.h"
	+#include "compilation/mm.h"
	+#include "compilation/context.h"
	+#include "llvmlayer.h"
	+
	+namespace xreate {namespace compilation{
	+
	+AllocatorType
	+Allocator::getType(const Expression& expr, AST* ast){
	+ auto manPredefined = analysis::PredefinedAnns::instance();
	+
	+ const Expression& hintE = analysis::findAnnByType(expr, ExpandedType(manPredefined.allocaT), ast);
	+ if (!hintE.isValid()) return AllocatorType::DEFAULT;
	+
	+ return (AllocatorType ) hintE.getValueDouble();
	+}
	+
	+Allocator*
	+Allocator::create(const Expression& expr, const Context& ctx){
	+ switch(getType(expr, ctx.pass->man->root)){
	+ case AllocatorType::LOCAL: {
	+ return new LocalAllocator(ctx.pass->man->llvm);
	+ }
	+
	+ case AllocatorType::CONTEXTPAD: {
	+ return ContextAllocator::create(expr, ctx);
	+ }
	+ }
	+
	+ return nullptr;
	+}
	+
	+ContextAllocator*
	+ContextAllocator::create(const Expression& expr, const Context& ctx){
	+ typehints::ContextAllocHint hint = typehints::find(expr, typehints::ContextAllocHint{});
	+ assert(!hint.pad.empty());
	+ AllocContext* context = ctx.pass->getContextManager()->getContext(hint.pad);
	+ llvm::Value* memRaw = context->get(ASTSite{expr.id});
	+
	+ return new ContextAllocator(memRaw, ctx.pass->man->llvm);
	+}
	+
	+llvm::Value*
	+ContextAllocator::allocate(llvm::Type* elRawT, llvm::Value* sizeRaw, const std::string& hintAlias){
	+ return Allocator::llvm->irBuilder.CreateCast(llvm::Instruction::BitCast, __mem, elRawT->getPointerTo());
	+}
	+
	+llvm::Value*
	+LocalAllocator::allocate(llvm::Type* elRawT,
	+ llvm::Value* sizeRaw,
	+ const std::string& hintAlias){
	+ return Allocator::llvm->irBuilder.CreateAlloca(elRawT, sizeRaw, hintAlias);
	+}
	+}} //xreate::compilation
	\ No newline at end of file
	diff --git a/cpp/src/compilation/mm.h b/cpp/src/compilation/mm.h
	new file mode 100644
	index 0000000..dd2cece
	--- /dev/null
	+++ b/cpp/src/compilation/mm.h
	@@ -0,0 +1,52 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: memory.h
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 27/05/2020
	+ */
	+#ifndef XREATE_MEMORY_H
	+#define XREATE_MEMORY_H
	+
	+#include "pass/compilepass.h"
	+
	+namespace xreate {namespace compilation{
	+
	+enum class AllocatorType{
	+ CONTEXTPAD,
	+ LOCAL, // local allocation
	+ DEFAULT = LOCAL
	+};
	+
	+class Allocator{
	+public:
	+ static Allocator* create(const Expression& expr, const Context& ctx);
	+ static AllocatorType getType(const Expression& expr, AST* ast);
	+
	+ Allocator(LLVMLayer* l): llvm(l){}
	+ virtual llvm::Value* allocate(llvm::Type* elRawT, llvm::Value* sizeRaw, const std::string& hintAlias) = 0;
	+
	+protected:
	+ LLVMLayer* llvm;
	+};
	+
	+class ContextAllocator: public Allocator{
	+public:
	+ static ContextAllocator* create(const Expression& expr, const Context& ctx);
	+ ContextAllocator(llvm::Value* mem, LLVMLayer* l): Allocator(l), __mem(mem){}
	+ virtual llvm::Value* allocate(llvm::Type* elRawT, llvm::Value* sizeRaw, const std::string& hintAlias) override;
	+
	+private:
	+ llvm::Value* __mem;
	+};
	+
	+class LocalAllocator: public Allocator{
	+public:
	+ LocalAllocator(LLVMLayer* l): Allocator(l){}
	+ virtual llvm::Value* allocate(llvm::Type* elRawT, llvm::Value* sizeRaw, const std::string& hintAlias) override;
	+};
	+
	+}} //xreate::compilation
	+#endif //XREATE_MEMORY_H
	diff --git a/cpp/src/compilation/resources.cpp b/cpp/src/compilation/resources.cpp
	index f7c6b43..4cf462b 100644
	--- a/cpp/src/compilation/resources.cpp
	+++ b/cpp/src/compilation/resources.cpp
	@@ -1,15 +1,18 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* File: resources.h
	*
	* Created in April, 2020
	*/

	#include "compilation/resources.h"

	namespace xreate{namespace compilation {
	const char *LAMBDA_PREFIX = ".lmd";
	+const char *FN_BLOCK_ENTRY = "entry";
	+const char *FN_BLOCK_PREALLOC = "prealloc";
	+const char *FN_BLOCK_PROLOG = "prolog";
	}} // end of xreate::compilation
	\ No newline at end of file
	diff --git a/cpp/src/compilation/resources.h b/cpp/src/compilation/resources.h
	index 319714a..dd9f262 100644
	--- a/cpp/src/compilation/resources.h
	+++ b/cpp/src/compilation/resources.h
	@@ -1,20 +1,23 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* File: resources.h
	*
	* Created in April, 2020
	*/

	#ifndef XREATE_RESOURCES_H
	#define XREATE_RESOURCES_H

	#include <string>

	namespace xreate{namespace compilation{
	extern const char *LAMBDA_PREFIX;
	+extern const char *FN_BLOCK_ENTRY;
	+extern const char *FN_BLOCK_PREALLOC;
	+extern const char *FN_BLOCK_PROLOG;
	}} // end of xreate::compilation

	#endif //XREATE_RESOURCES_H
	diff --git a/cpp/src/llvmlayer.cpp b/cpp/src/llvmlayer.cpp
	index 1474b50..b0ff434 100644
	--- a/cpp/src/llvmlayer.cpp
	+++ b/cpp/src/llvmlayer.cpp
	@@ -1,295 +1,309 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* llvmlayer.cpp
	*
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	/**
	* \file llvmlayer.h
	* \brief Bytecode generation
	*/

	#include "ast.h"
	#include "llvmlayer.h"
	#include "analysis/typehints.h"

	#ifdef XREATE_ENABLE_EXTERN
	#include "ExternLayer.h"
	#endif

	#include <compilation/containers.h>
	#include "llvm/IR/Module.h"
	#include "llvm/IR/Function.h"
	#include "llvm/IR/PassManager.h"
	#include "llvm/IR/CallingConv.h"
	#include "llvm/IR/Verifier.h"
	#include "llvm/IR/IRPrintingPasses.h"
	#include "llvm/Support/raw_ostream.h"
	#include "llvm/ExecutionEngine/ExecutionEngine.h"
	#include "llvm/ExecutionEngine/MCJIT.h"
	#include "llvm/Support/TargetSelect.h"

	#include <iostream>
	#include <cmath>


	using namespace llvm;
	using namespace xreate;
	using namespace xreate::typehints;
	using namespace std;

	LLVMLayer::LLVMLayer(AST *root)
	: llvmContext(),
	irBuilder(llvmContext),
	ast(root),
	module(new llvm::Module(root->getModuleName(), llvmContext)){
	llvm::InitializeNativeTarget();
	llvm::InitializeNativeTargetAsmPrinter();
	llvm::EngineBuilder builder;
	TargetMachine *target = builder.selectTarget();
	module->setDataLayout(target->createDataLayout());

	#ifdef XREATE_ENABLE_EXTERN
	layerExtern = new ExternLayer(this);
	layerExtern->init(root);
	#endif
	}

	void *
	LLVMLayer::getFunctionPointer(llvm::Function *function){
	uint64_t entryAddr = jit->getFunctionAddress(function->getName().str());
	return (void *) entryAddr;
	}

	void
	LLVMLayer::initJit(){
	std::string ErrStr;
	llvm::EngineBuilder builder(std::unique_ptr<llvm::Module>(module.release()));
	jit.reset(builder
	.setEngineKind(llvm::EngineKind::JIT)
	.setTargetOptions(optsTarget)
	.setOptLevel(optsLevel)
	.setErrorStr(&ErrStr)
	.setVerifyModules(true)
	.create()
	);
	}

	void
	LLVMLayer::print(){
	llvm::PassManager<llvm::Module> PM;
	PM.addPass(llvm::PrintModulePass(llvm::outs(), "banner"));
	llvm::AnalysisManager<llvm::Module> aman;
	PM.run(*module.get(), aman);
	}

	void
	LLVMLayer::moveToGarbage(void *o){
	__garbage.push_back(o);
	}

	llvm::Type*
	LLVMLayer::toLLVMType(const ExpandedType &ty, const Expression& expr){
	TypeAnnotation t = ty.get();
	switch(t.__operator){
	case TypeOperator::ARRAY:{
	if (expr.tags.size() == 0) return nullptr; //TODO shouldn't be invalid

	return containers::IContainersIR::getRawType(expr, ty, this);
	}

	case TypeOperator::RECORD:{
	std::vector<llvm::Type *> packVec;
	packVec.reserve(t.__operands.size());

	std::transform(t.__operands.begin(), t.__operands.end(), std::inserter(packVec, packVec.end()),
	[this](const TypeAnnotation &t){
	return toLLVMType(ExpandedType(TypeAnnotation(t)));
	});

	llvm::ArrayRef<llvm::Type *> packArr(packVec);
	return llvm::StructType::get(llvmContext, packArr, false);
	};

	case TypeOperator::REF:{
	TypeAnnotation tyRef = t.__operands.at(0);
	assert(tyRef.__operator == TypeOperator::ALIAS);
	llvm::StructType *tyOpaqRaw = llvm::StructType::create(llvmContext, tyRef.__valueCustom);
	llvm::PointerType *tyRefRaw = llvm::PointerType::get(tyOpaqRaw, 0);

	return tyRefRaw;
	};

	case TypeOperator::ALIAS:{
	#ifdef XREATE_ENABLE_EXTERN
	//Look in extern types
	clang::QualType qt = layerExtern->lookupType(t.__valueCustom);
	return layerExtern->toLLVMType(qt);
	#else
	assert(false);
	#endif
	};

	//DEBT omit ID field in case of single variant.
	case TypeOperator::VARIANT:{
	/* Variant Type Layout:
	* {
	* id :: i8, Holds stored variant id
	* storage:: type of biggest variant
	* }
	*/
	uint64_t sizeStorage = 0;
	llvm::Type *typStorageRaw = llvm::Type::getVoidTy(llvmContext);
	for(const TypeAnnotation &subtype : t.__operands){
	llvm::Type *subtypeRaw = toLLVMType(ExpandedType(subtype));
	if(subtypeRaw->isVoidTy()) continue;

	uint64_t sizeSubtype = module->getDataLayout().getTypeStoreSize(subtypeRaw);
	if(sizeSubtype > sizeStorage){
	sizeStorage = sizeSubtype;
	typStorageRaw = subtypeRaw;
	}
	}

	std::vector<llvm::Type *> layout;
	layout.push_back(llvm::Type::getInt8Ty(llvmContext)); //id

	const bool flagHoldsData = sizeStorage > 0;
	if(flagHoldsData){
	layout.push_back(typStorageRaw); //storage
	}

	return llvm::StructType::get(llvmContext, llvm::ArrayRef<llvm::Type *>(layout));
	}

	case TypeOperator::NONE:{
	switch(t.__value){
	case TypePrimitive::Bool:
	return llvm::Type::getInt1Ty(llvmContext);

	case TypePrimitive::I8:
	return llvm::Type::getInt8Ty(llvmContext);

	case TypePrimitive::I32:
	return llvm::Type::getInt32Ty(llvmContext);

	case TypePrimitive::I64:
	return llvm::Type::getInt64Ty(llvmContext);

	case TypePrimitive::Int: {
	// IntBits hintSize;
	// if (existsSize(hintSize)){
	// return llvm::IntegerType::getIntNTy(llvmContext, hintSize.n);
	// }

	TypesHelper helper(this);
	return helper.getPreferredIntTy();
	}

	case TypePrimitive::Float:
	return llvm::Type::getDoubleTy(llvmContext);

	case TypePrimitive::String:
	return llvm::Type::getInt8PtrTy(llvmContext);

	case TypePrimitive::Invalid:
	return llvm::Type::getVoidTy(llvmContext);

	default:
	assert(false);
	}
	}

	default:
	assert(false);
	}

	assert(false);
	return nullptr;
	}

	bool
	TypesHelper::isRecordT(const ExpandedType &ty){
	const TypeAnnotation &t = ty.get();

	if(t.__operator == TypeOperator::RECORD){
	return true;
	}

	if(t.__operator != TypeOperator::ALIAS){
	return false;
	}

	#ifdef XREATE_ENABLE_EXTERN
	clang::QualType tqual = llvm->layerExtern->lookupType(t.__valueCustom);
	const clang::Type * raw = tqual.getTypePtr();

	// TODO skip ALL the pointers until non-pointer type found
	if (raw->isStructureType()) return true;
	if (!raw->isAnyPointerType()) return false;

	clang::QualType pointee = raw->getPointeeType();
	return pointee->isStructureType();
	#else
	assert(false);
	return false;
	#endif
	}

	bool
	TypesHelper::isArrayT(const Expanded<TypeAnnotation>& ty){
	const TypeAnnotation &t = ty.get();

	if(t.__operator == TypeOperator::ARRAY){
	return true;
	}

	return false;
	}

	bool
	TypesHelper::isPointerT(const ExpandedType &ty){
	if(ty.get().__operator != TypeOperator::ALIAS) return false;

	#ifdef XREATE_ENABLE_EXTERN
	clang::QualType qt = llvm->layerExtern->lookupType(ty.get().__valueCustom);
	return llvm->layerExtern->isPointer(qt);
	#else
	assert(false);
	return false;
	#endif
	}

	bool
	TypesHelper::isIntegerT(const Expanded<TypeAnnotation>& ty){
	return
	(ty->__operator == TypeOperator::NONE) &&
	((ty->__value == TypePrimitive::Bool) \|\|
	(ty->__value == TypePrimitive::I8) \|\|
	(ty->__value == TypePrimitive::I32) \|\|
	(ty->__value == TypePrimitive::I64) \|\|
	(ty->__value == TypePrimitive::Int));
	}


	std::vector<std::string>
	TypesHelper::getRecordFields(const ExpandedType &t){
	#ifdef XREATE_ENABLE_EXTERN
	return (t.get().__operator == TypeOperator::RECORD)
	? t.get().fields
	: llvm->layerExtern->getStructFields(
	llvm->layerExtern->lookupType(t.get().__valueCustom));
	#else
	assert(t.get().__operator == TypeOperator::RECORD);
	return t.get().fields;
	#endif
	}

	llvm::IntegerType *
	TypesHelper::getPreferredIntTy() const{
	unsigned sizePreferred = llvm->module->getDataLayout().getLargestLegalIntTypeSizeInBits();
	return llvm::IntegerType::getIntNTy(llvm->llvmContext, sizePreferred);
	+}
	+
	+LLVMBlockLocker::LLVMBlockLocker(LLVMLayer *llvm, bool jumpBack):
	+__llvm(llvm), __jumpBack(jumpBack){
	+ __blockLocked = __llvm->irBuilder.GetInsertBlock();
	+}
	+
	+LLVMBlockLocker::~LLVMBlockLocker(){
	+ if (__jumpBack){
	+ assert(__blockLocked);
	+ __llvm->irBuilder.CreateBr(__blockLocked);
	+ }
	+
	+ __llvm->irBuilder.SetInsertPoint(__blockLocked);
	}
	\ No newline at end of file
	diff --git a/cpp/src/llvmlayer.h b/cpp/src/llvmlayer.h
	index 61738ec..0cdf615 100644
	--- a/cpp/src/llvmlayer.h
	+++ b/cpp/src/llvmlayer.h
	@@ -1,69 +1,79 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* llvmlayer.h
	*
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	#ifndef LLVMLAYER_H
	#define LLVMLAYER_H

	#include "ast.h"
	#include "utils.h"

	#include "llvm/IR/LLVMContext.h"
	#include "llvm/IR/IRBuilder.h"
	#include "llvm/Target/TargetOptions.h"

	namespace llvm {
	class ExecutionEngine;
	}

	namespace xreate {

	class ExternLayer;

	/** \brief A wrapper over LLVM toolchain to generate and execute bytecode */
	class LLVMLayer {
	public:
	LLVMLayer(AST* rootAST);

	mutable llvm::LLVMContext llvmContext;
	llvm::IRBuilder<> irBuilder;
	AST *ast = 0;
	ExternLayer *layerExtern =0;
	std::unique_ptr<llvm::Module> module;
	std::unique_ptr<llvm::ExecutionEngine> jit;
	llvm::TargetOptions optsTarget;
	llvm::CodeGenOpt::Level optsLevel = llvm::CodeGenOpt::None;

	void moveToGarbage(void *o);
	llvm::Type* toLLVMType(const Expanded<TypeAnnotation>& ty, const Expression& expr = Expression());
	void print();
	void* getFunctionPointer(llvm::Function* function);
	void initJit();

	private:
	llvm::Type* toLLVMType(const Expanded<TypeAnnotation>& ty, std::map<int, llvm::StructType*>& conjunctions) const;
	std::vector<void *> __garbage;
	};

	class TypesHelper {
	public:
	bool isArrayT(const Expanded<TypeAnnotation>& ty);
	bool isRecordT(const Expanded<TypeAnnotation>& ty);
	bool isPointerT(const Expanded<TypeAnnotation>& ty);
	bool isIntegerT(const Expanded<TypeAnnotation>& ty);
	llvm::IntegerType* getPreferredIntTy() const;
	std::vector<std::string> getRecordFields(const Expanded<TypeAnnotation>& t);

	TypesHelper(const LLVMLayer* llvmlayer): llvm(llvmlayer){}

	private:
	const LLVMLayer* llvm;
	};
	+
	+struct LLVMBlockLocker{
	+ LLVMBlockLocker(LLVMLayer* llvm, bool jumpBack);
	+ ~LLVMBlockLocker();
	+
	+private:
	+ LLVMLayer* __llvm;
	+ bool __jumpBack;
	+ llvm::BasicBlock* __blockLocked;
	+};

	}
	#endif // LLVMLAYER_H
	diff --git a/cpp/src/pass/compilepass.cpp b/cpp/src/pass/compilepass.cpp
	index 60d53ec..f7f205f 100644
	--- a/cpp/src/pass/compilepass.cpp
	+++ b/cpp/src/pass/compilepass.cpp
	@@ -1,911 +1,916 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	/**
	* \file compilepass.h
	* \brief Main compilation routine. See \ref xreate::CompilePass
	*/

	#include "compilepass.h"
	#include "transcendlayer.h"
	#include "ast.h"
	#include "llvmlayer.h"

	#include "compilation/decorators.h"
	#include "compilation/pointers.h"
	#include "analysis/typeinference.h"
	#include "compilation/control.h"
	#include "compilation/demand.h"
	#include "compilation/intrinsics.h"
	#include "analysis/resources.h"

	#ifdef XREATE_ENABLE_EXTERN
	#include "ExternLayer.h"
	#endif

	#include "compilation/containers.h"
	#include "compilation/containers/arrays.h"
	+#include "compilation/context.h"
	+#include <analysis/resources.h>

	#ifndef XREATE_CONFIG_MIN
	#include "query/containers.h"

	#include "pass/versionspass.h"
	#include "compilation/targetinterpretation.h"
	#endif

	#include <boost/optional.hpp>
	#include <memory>

	using namespace std;
	using namespace llvm;
	using namespace xreate::typehints;
	using namespace xreate::containers;

	namespace xreate{
	namespace compilation{
	#define DEFAULT(x) (hintAlias.empty()? x: hintAlias)

	std::string
	BasicBruteFunction::prepareName() {
	AST* ast = IBruteFunction::pass->man->root;

	string name = ast->getFnSpecializations(__function->__name).size() > 1 ?
	__function->__name + std::to_string(__function.id()) :
	__function->__name;

	return name;
	}

	std::vector<llvm::Type*>
	BasicBruteFunction::prepareSignature() {
	CodeScope* entry = __function->__entry;

	return getScopeSignature(entry);
	}

	llvm::Type*
	BasicBruteFunction::prepareResult() {
	LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	AST* ast = IBruteFunction::pass->man->root;
	CodeScope* entry = __function->__entry;
	- const Expression retE = entry->__declarations.at(ScopedSymbol::RetSymbol);
	+ Expression retE = entry->__declarations.at(ScopedSymbol::RetSymbol);
	const ExpandedType& retT = ast->getType(retE);
	+
	+ //Use fn tags as return type hints for now:
	+ for (const auto tag: __function->getTags()){
	+ retE.tags.emplace(tag.first, tag.second);
	+ }
	+
	return llvm->toLLVMType(retT, retE);
	}

	llvm::Function::arg_iterator
	BasicBruteFunction::prepareBindings() {
	CodeScope* entry = __function->__entry;
	IBruteScope* entryCompilation = IBruteFunction::getBruteScope(entry);
	llvm::Function::arg_iterator fargsI = IBruteFunction::raw->arg_begin();

	for (std::string &arg : entry->__bindings) {
	ScopedSymbol argid{entry->__identifiers[arg], versions::VERSION_NONE};

	entryCompilation->bindArg(&*fargsI, argid);
	fargsI->setName(arg);
	++fargsI;
	}

	return fargsI;
	}

	void
	BasicBruteFunction::applyAttributes(){}

	IBruteScope::IBruteScope(const CodeScope * const codeScope, IBruteFunction* f, CompilePass* compilePass)
	: pass(compilePass), function(f), scope(codeScope), lastBlockRaw(nullptr) { }

	llvm::Value*
	BruteFnInvocation::operator()(std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	if (__calleeTy) {
	auto argsFormalT = __calleeTy->params();
	size_t sizeArgsF = __calleeTy->getNumParams();
	assert(args.size() >= sizeArgsF);
	assert(__calleeTy->isVarArg() \|\| args.size() == sizeArgsF);

	auto argFormalT = argsFormalT.begin();
	for(size_t argId = 0; argId < args.size(); ++argId){
	if(argFormalT != argsFormalT.end()){
	args[argId] = typeinference::doAutomaticTypeConversion(
	args.at(argId), *argFormalT, llvm->irBuilder);
	++argFormalT;
	}
	}
	}

	//Do not name function call that returns Void.
	std::string hintName = (!__calleeTy->getReturnType()->isVoidTy()) ? hintDecl : "";
	return llvm->irBuilder.CreateCall(__calleeTy, __callee, args, hintName);
	}

	llvm::Value*
	HiddenArgsFnInvocation::operator() (std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	args.insert(args.end(), __args.begin(), __args.end());
	return __parent->operator ()(std::move(args), hintDecl);
	}

	class CallStatementInline : public IFnInvocation{
	public:

	CallStatementInline(IBruteFunction* caller, IBruteFunction* callee, LLVMLayer* l)
	: __caller(caller), __callee(callee), llvm(l) { }

	llvm::Value* operator()(std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	return nullptr;
	}

	private:
	IBruteFunction* __caller;
	IBruteFunction* __callee;
	LLVMLayer* llvm;

	bool
	isInline() {
	// Symbol ret = Symbol{0, function->__entry};
	// bool flagOnTheFly = SymbolAttachments::get<IsImplementationOnTheFly>(ret, false);
	//TODO consider inlining
	return false;
	}
	} ;

	BasicBruteScope::BasicBruteScope(const CodeScope * const codeScope, IBruteFunction* f, CompilePass* compilePass)
	: IBruteScope(codeScope, f, compilePass) { }

	llvm::Value*
	BasicBruteScope::processSymbol(const Symbol& s, std::string hintRetVar) {
	Expression declaration = CodeScope::getDefinition(s);
	const CodeScope* scopeExternal = s.scope;
	IBruteScope* scopeBruteExternal = IBruteScope::function->getBruteScope(scopeExternal);
	assert(scopeBruteExternal->lastBlockRaw);

	llvm::Value* resultRaw;
	llvm::BasicBlock* blockOwn = pass->man->llvm->irBuilder.GetInsertBlock();

	if (scopeBruteExternal->lastBlockRaw == blockOwn) {
	resultRaw = scopeBruteExternal->process(declaration, hintRetVar);
	scopeBruteExternal->lastBlockRaw = lastBlockRaw =
	pass->man->llvm->irBuilder.GetInsertBlock();

	} else {
	pass->man->llvm->irBuilder.SetInsertPoint(scopeBruteExternal->lastBlockRaw);
	resultRaw = scopeBruteExternal->processSymbol(s, hintRetVar);
	pass->man->llvm->irBuilder.SetInsertPoint(blockOwn);
	}

	return resultRaw;
	}

	IFnInvocation*
	BasicBruteScope::findFunction(const Expression& opCall) {
	const std::string& calleeName = opCall.getValueString();
	LLVMLayer* llvm = pass->man->llvm;
	const std::list<ManagedFnPtr>& specializations = pass->man->root->getFnSpecializations(calleeName);

	#ifdef XREATE_ENABLE_EXTERN
	//if no specializations registered - check external function
	if (specializations.size() == 0) {
	llvm::Function* external = llvm->layerExtern->lookupFunction(calleeName);

	llvm::outs() << "Debug/External function: " << calleeName;
	external->getType()->print(llvm::outs(), true);
	llvm::outs() << "\n";

	return new BruteFnInvocation(external, llvm);
	}
	#endif

	//There should be only one specialization without any valid guards at this point
	return new BruteFnInvocation(pass->getBruteFn(
	- pass->man->root->findFunction(calleeName))->compile(),
	- llvm);
	+ pass->man->root->findFunction(calleeName))->compile(),
	+ llvm
	+ );
	}

	//DISABLEDFEATURE transformations
	// if (pass->transformations->isAcceptable(expr)){
	// return pass->transformations->transform(expr, result, ctx);
	// }

	llvm::Value*
	BasicBruteScope::process(const Expression& expr, const std::string& hintAlias, const TypeAnnotation& expectedT) {
	llvm::Value *leftRaw;
	llvm::Value *rightRaw;
	LLVMLayer& l = *pass->man->llvm;
	Context ctx{this, function, pass};
	xreate::compilation::ControlIR controlIR = xreate::compilation::ControlIR({this, function, pass});

	switch (expr.op) {
	case Operator::ADD:
	case Operator::SUB: case Operator::MUL: case Operator::MOD:
	case Operator::DIV: case Operator::EQU: case Operator::LSS:
	case Operator::GTR: case Operator::NE: case Operator::LSE:
	case Operator::GTE:
	assert(expr.__state == Expression::COMPOUND);
	assert(expr.operands.size() == 2);

	leftRaw = process(expr.operands.at(0));
	rightRaw = process(expr.operands.at(1));

	break;

	default:;
	}

	switch (expr.op) {
	case Operator::AND:
	{
	assert(expr.operands.size());
	llvm::Value* resultRaw = process(expr.operands.at(0));
	if (expr.operands.size() == 1) return resultRaw;

	for(size_t i=1; i< expr.operands.size()-1; ++i){
	resultRaw = l.irBuilder.CreateAnd(resultRaw, process(expr.operands.at(i)));
	}
	return l.irBuilder.CreateAnd(resultRaw, process(expr.operands.at(expr.operands.size()-1)), hintAlias);
	}

	case Operator::OR:
	{
	assert(expr.operands.size());
	llvm::Value* resultRaw = process(expr.operands.at(0));
	if (expr.operands.size() == 1) return resultRaw;

	for(size_t i=1; i< expr.operands.size()-1; ++i){
	resultRaw = l.irBuilder.CreateOr(resultRaw, process(expr.operands.at(i)));
	}
	return l.irBuilder.CreateOr(resultRaw, process(expr.operands.at(expr.operands.size()-1)), hintAlias);
	}

	case Operator::ADD:
	{
	return l.irBuilder.CreateAdd(leftRaw, rightRaw, hintAlias);
	}

	case Operator::SUB:
	return l.irBuilder.CreateSub(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::MUL:
	return l.irBuilder.CreateMul(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::DIV:
	if (leftRaw->getType()->isIntegerTy()) return l.irBuilder.CreateSDiv(leftRaw, rightRaw, hintAlias);
	if (leftRaw->getType()->isFloatingPointTy()) return l.irBuilder.CreateFDiv(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::MOD:{
	return l.irBuilder.CreateSRem(leftRaw, rightRaw, hintAlias);
	}

	case Operator::EQU: {
	if (leftRaw->getType()->isIntegerTy()) return l.irBuilder.CreateICmpEQ(leftRaw, rightRaw, hintAlias);
	if (leftRaw->getType()->isFloatingPointTy()) return l.irBuilder.CreateFCmpOEQ(leftRaw, rightRaw, hintAlias);

	const ExpandedType& leftT = pass->man->root->getType(expr.operands[0]);
	const ExpandedType& rightT = pass->man->root->getType(expr.operands[1]);

	if(leftT->__operator == TypeOperator::VARIANT && rightT->__operator == TypeOperator::VARIANT){
	llvm::Type* selectorT = llvm::cast<llvm::StructType>(leftRaw->getType())->getElementType(0);
	llvm::Value* leftUnwapped = typeinference::doAutomaticTypeConversion(leftRaw, selectorT, l.irBuilder);
	llvm::Value* rightUnwapped = typeinference::doAutomaticTypeConversion(rightRaw, selectorT, l.irBuilder);
	return l.irBuilder.CreateICmpEQ(leftUnwapped, rightUnwapped, hintAlias);
	}
	break;
	}

	case Operator::NE:
	return l.irBuilder.CreateICmpNE(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::LSS:
	return l.irBuilder.CreateICmpSLT(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::LSE:
	return l.irBuilder.CreateICmpSLE(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::GTR:
	return l.irBuilder.CreateICmpSGT(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::GTE:
	return l.irBuilder.CreateICmpSGE(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::NEG:
	{
	leftRaw = process(expr.operands[0]);
	ExpandedType leftTy = pass->man->root->getType(expr.operands[0]);

	if (leftTy->__value == TypePrimitive::Bool){
	return l.irBuilder.CreateNot(leftRaw, hintAlias);
	} else {
	return l.irBuilder.CreateNeg(leftRaw, hintAlias);
	}
	break;
	}

	case Operator::CALL:
	{
	assert(expr.__state == Expression::COMPOUND);
	shared_ptr<IFnInvocation> callee(findFunction(expr));
	- const std::string& nameCallee = expr.getValueString();

	//prepare arguments
	std::vector<llvm::Value *> args;
	args.reserve(expr.operands.size());

	std::transform(expr.operands.begin(), expr.operands.end(), std::inserter(args, args.end()),
	[this](const Expression & operand) {
	return process(operand);
	}
	);

	return (*callee)(move(args), hintAlias);
	}

	case Operator::IF:
	{
	return controlIR.compileIf(expr, hintAlias);
	}

	case Operator::SWITCH:
	{
	return controlIR.compileSwitch(expr, hintAlias);
	}

	case Operator::LOGIC_AND:
	{
	assert(expr.operands.size() == 1);
	return process(expr.operands[0]);
	}

	case Operator::LIST: //init record or array
	{
	ExpandedType exprT = l.ast->getType(expr, expectedT);
	TypesHelper helper(pass->man->llvm);

	enum {RECORD, ARRAY} kind;
	if (helper.isArrayT(exprT)){
	kind = ARRAY;

	} else if (helper.isRecordT(exprT)){
	kind = RECORD;
	} else {
	assert(false && "Inapproriate type");
	}

	#ifdef XREATE_ENABLE_EXTERN
	if (exprT->__operator == TypeOperator::ALIAS){
	if (l.layerExtern->isArrayType(exprT->__valueCustom)){
	flagIsArray = true;
	break;
	}

	if (l.layerExtern->isRecordType(exprT->__valueCustom)){
	flagIsArray = false;
	break;
	}

	assert(false && "Inapproriate external type");
	}
	#endif

	switch(kind){
	case RECORD:{
	const std::vector<string> fieldsFormal = helper.getRecordFields(exprT);
	containers::RecordIR irRecords(ctx);
	llvm::StructType *recordTRaw = llvm::cast<llvm::StructType>(l.toLLVMType(exprT));
	llvm::Value *resultRaw = irRecords.init(recordTRaw);
	- return irRecords.update(resultRaw, exprT, expr);
	+ return irRecords.update(resultRaw, exprT, expr, hintAlias);
	}

	case ARRAY: {
	+ std::unique_ptr<Allocator> allocator(Allocator::create(expr, ctx));
	std::unique_ptr<containers::IContainersIR> containerIR(
	containers::IContainersIR::create(expr, expectedT, ctx));
	- llvm::Value* aggrRaw = containerIR->init(hintAlias);
	+ llvm::Value* aggrRaw = containerIR->init(allocator.get(), hintAlias);
	+
	return containerIR->update(aggrRaw, expr, hintAlias);
	}
	}
	break;
	};

	case Operator::LIST_RANGE:
	{
	containers::RangeIR compiler(ctx);
	const ExpandedType& aggrT = pass->man->root->getType(expr);

	return compiler.init(expr, aggrT, hintAlias);
	};

	case Operator::MAP:
	{
	assert(expr.blocks.size());

	containers::ImplementationType implType = containers::IContainersIR::getImplementation(expr, pass->man->root);

	switch(implType){
	case containers::ImplementationType::SOLID: {
	ExpandedType exprT = pass->man->root->getType(expr, expectedT);
	ArrayHint hint = find(expr, ArrayHint{});

	containers::ArrayIR compiler(exprT, hint, ctx);
	return compiler.operatorMap(expr, hintAlias);
	}

	case containers::ImplementationType::ON_THE_FLY:{
	FlyHint hint = find<FlyHint>(expr, {});
	containers::FlyIR compiler(hint, ctx);

	return compiler.operatorMap(expr, hintAlias);
	}

	default:
	break;
	}
	assert(false && "Operator MAP does not support this container impl");
	return nullptr;
	};

	case Operator::FOLD:
	{
	return controlIR.compileFold(expr, hintAlias);
	};

	case Operator::FOLD_INF:
	{
	return controlIR.compileFoldInf(expr, hintAlias);
	};

	case Operator::INDEX:
	{
	assert(expr.operands.size() > 1);

	const Expression& aggrE = expr.operands[0];
	const ExpandedType& aggrT = pass->man->root->getType(aggrE);
	llvm::Value* aggrRaw = process(aggrE);
	switch (aggrT->__operator) {
	case TypeOperator::RECORD:
	{
	list<string> fieldsList;
	for(auto opIt = ++expr.operands.begin(); opIt!=expr.operands.end(); ++opIt){
	fieldsList.push_back(getIndexStr(*opIt));
	}

	- return controlIR.compileStructIndex(aggrRaw, aggrT, fieldsList);
	+ return controlIR.compileStructIndex(aggrRaw, aggrT, fieldsList, hintAlias);
	};

	case TypeOperator::ARRAY:
	{
	std::vector<llvm::Value*> indexes;
	std::transform(++expr.operands.begin(), expr.operands.end(), std::inserter(indexes, indexes.end()),
	[this] (const Expression & op) {
	return process(op);
	}
	);

	std::unique_ptr<containers::IContainersIR> containersIR(
	containers::IContainersIR::create(aggrE, expectedT, ctx)
	);

	containers::ArrayIR* arraysIR = static_cast<containers::ArrayIR*>(containersIR.get());
	return arraysIR->get(aggrRaw, indexes, hintAlias);
	};

	default:
	assert(false);
	}
	};

	case Operator::CALL_INTRINSIC:{
	IntrinsicCompiler compiler(this->pass->man);
	return compiler.compile(expr, ctx, hintAlias);
	}

	// const std::string op = expr.getValueString();
	//
	// if (op == "copy") {
	// llvm::Value* result = process(expr.getOperands().at(0));
	//
	// auto decoratorVersions = Decorators<VersionsScopeDecoratorTag>::getInterface(this);
	// llvm::Value* storage = decoratorVersions->processIntrinsicInit(result->getType());
	// decoratorVersions->processIntrinsicCopy(result, storage);
	//
	// return l.irBuilder.CreateLoad(storage, hintAlias);
	// }

	case Operator::QUERY:
	case Operator::QUERY_LATE:
	{
	assert(false && "Should be processed by interpretation");
	}

	case Operator::VARIANT:
	{
	const ExpandedType& typResult = pass->man->root->getType(expr);
	llvm::Type* typResultRaw = l.toLLVMType(typResult);
	llvm::Type* typIdRaw = llvm::cast<llvm::StructType>(typResultRaw)->getElementType(0);

	uint64_t id = expr.getValueDouble();
	llvm::Value* resultRaw = llvm::UndefValue::get(typResultRaw);
	resultRaw = l.irBuilder.CreateInsertValue(resultRaw, llvm::ConstantInt::get(typIdRaw, id), llvm::ArrayRef<unsigned>({0}));

	const ExpandedType& typVariant = ExpandedType(typResult->__operands.at(id));
	llvm::Type* typVariantRaw = l.toLLVMType(typVariant);
	llvm::Value* variantRaw = llvm::UndefValue::get(typVariantRaw);
	assert(expr.operands.size() == typVariant->__operands.size() && "Wrong variant arguments count");
	if (!typVariant->__operands.size()) return resultRaw;

	for (unsigned int fieldId = 0; fieldId < expr.operands.size(); ++fieldId) {
	const ExpandedType& typField = ExpandedType(typVariant->__operands.at(fieldId));
	Attachments::put<TypeInferred>(expr.operands.at(fieldId), typField);
	llvm::Value* fieldRaw = process(expr.operands.at(fieldId));
	assert(fieldRaw);

	variantRaw = l.irBuilder.CreateInsertValue(variantRaw, fieldRaw, llvm::ArrayRef<unsigned>({fieldId}));
	}

	llvm::Type* typStorageRaw = llvm::cast<llvm::StructType>(typResultRaw)->getElementType(1);
	llvm::Value* addrAsStorage = l.irBuilder.CreateAlloca(typStorageRaw);
	llvm::Value* addrAsVariant = l.irBuilder.CreateBitOrPointerCast(addrAsStorage, typVariantRaw->getPointerTo());

	l.irBuilder.CreateStore(variantRaw, addrAsVariant);
	llvm::Value* storageRaw = l.irBuilder.CreateLoad(typStorageRaw, addrAsStorage);
	resultRaw = l.irBuilder.CreateInsertValue(resultRaw, storageRaw, llvm::ArrayRef<unsigned>({1}));

	return resultRaw;
	}

	case Operator::SWITCH_VARIANT:
	{
	return controlIR.compileSwitchVariant(expr, hintAlias);
	}

	case Operator::SWITCH_LATE:
	{
	assert(false && "Instruction's compilation should've been redirected to interpretation");
	return nullptr;
	}

	case Operator::SEQUENCE:
	{
	return controlIR.compileSequence(expr);
	}

	case Operator::UNDEF:
	{
	- llvm::Type* typExprUndef = l.toLLVMType(pass->man->root->getType(expr, expectedT));
	- return llvm::UndefValue::get(typExprUndef);
	+ const ExpandedType& exprUndefT = pass->man->root->getType(expr, expectedT);
	+ if (exprUndefT->__operator == TypeOperator ::ARRAY){
	+ std::unique_ptr<IContainersIR> compiler(IContainersIR::create(expr, exprUndefT.get(), ctx));
	+ std::unique_ptr<Allocator> allocator(Allocator::create(expr, ctx));
	+ return compiler->init(allocator.get(), hintAlias);
	+ }
	+
	+ llvm::Type* exprUndefRawT = l.toLLVMType(exprUndefT);
	+ return llvm::UndefValue::get(exprUndefRawT);
	}

	case Operator::UPDATE:
	{
	TypesHelper helper(pass->man->llvm);
	containers::RecordIR irRecords(ctx);

	const Expression& aggrE = expr.operands.at(0);
	const Expression& updE = expr.operands.at(1);
	const ExpandedType& aggrT = pass->man->root->getType(aggrE);
	llvm::Value* aggrRaw = process(aggrE);

	if (helper.isRecordT(aggrT)){
	- return irRecords.update(aggrRaw, aggrT, updE);
	+ return irRecords.update(aggrRaw, aggrT, updE, hintAlias);
	}

	if (helper.isArrayT(aggrT)){
	if (updE.op == Operator::LIST_INDEX){

	std::unique_ptr<containers::IContainersIR> containersIR(
	containers::IContainersIR::create(aggrE, TypeAnnotation(), ctx
	));

	return containersIR->update(aggrRaw, updE, hintAlias);
	}
	}

	assert(false);
	return nullptr;
	}

	case Operator::INVALID:
	assert(expr.__state != Expression::COMPOUND);

	switch (expr.__state) {
	case Expression::IDENT:
	{
	Symbol s = Attachments::get<IdentifierSymbol>(expr);
	return processSymbol(s, expr.getValueString());
	}

	case Expression::NUMBER:
	{
	llvm::Type* typConst = l.toLLVMType(pass->man->root->getType(expr, expectedT));
	int literal = expr.getValueDouble();

	if (typConst->isFloatingPointTy()) return llvm::ConstantFP::get(typConst, literal);
	if (typConst->isIntegerTy()) return llvm::ConstantInt::get(typConst, literal);

	assert(false && "Can't compile literal");
	}

	case Expression::STRING:
	{
	return controlIR.compileConstantStringAsPChar(expr.getValueString(), hintAlias);
	};

	default:
	{
	break;
	}
	};

	break;

	default: break;

	}

	assert(false && "Can't compile expression");
	return 0;
	}

	llvm::Value*
	-BasicBruteScope::compile(const std::string& hintBlockDecl) {
	- LLVMLayer* llvm = pass->man->llvm;
	-
	- if (!hintBlockDecl.empty()) {
	- llvm::BasicBlock *block = llvm::BasicBlock::Create(llvm->llvmContext, hintBlockDecl, function->raw);
	- pass->man->llvm->irBuilder.SetInsertPoint(block);
	- }
	-
	+BasicBruteScope::compile() {
	lastBlockRaw = pass->man->llvm->irBuilder.GetInsertBlock();
	Symbol symbScope = Symbol{ScopedSymbol::RetSymbol, scope};

	//set hint for an entry scope
	string retAlias = (scope->__parent)? "" : function->prepareName();
	return processSymbol(symbScope, retAlias);
	}

	IBruteScope::~IBruteScope() { }

	IBruteFunction::~IBruteFunction() { }

	llvm::Function*
	IBruteFunction::compile() {
	- if (raw != nullptr) return raw;
	+ if (raw != nullptr) return raw;

	- LLVMLayer* llvm = pass->man->llvm;
	- llvm::IRBuilder<>& builder = llvm->irBuilder;
	-
	- string&& functionName = prepareName();
	- std::vector<llvm::Type*>&& types = prepareSignature();
	- llvm::Type* expectedResultType = prepareResult();
	-
	- llvm::FunctionType *ft = llvm::FunctionType::get(expectedResultType, types, false);
	- raw = llvm::cast<llvm::Function>(llvm->module->getOrInsertFunction(functionName, ft));
	- prepareBindings();
	- applyAttributes();
	+ LLVMLayer* llvm = pass->man->llvm;
	+ llvm::IRBuilder<>& builder = llvm->irBuilder;

	- const std::string& blockName = "entry";
	- llvm::BasicBlock* blockCurrent = builder.GetInsertBlock();
	+ string&& functionName = prepareName();
	+ std::vector<llvm::Type*>&& types = prepareSignature();
	+ llvm::Type* expectedResultType = prepareResult();

	- llvm::Value* result = getBruteScope(__entry)->compile(blockName);
	- assert(result);
	+ llvm::FunctionType *ft = llvm::FunctionType::get(expectedResultType, types, false);
	+ raw = llvm::cast<llvm::Function>(llvm->module->getOrInsertFunction(functionName, ft));
	+ prepareBindings();
	+ applyAttributes();

	- //SECTIONTAG types/convert function ret value
	- builder.CreateRet(typeinference::doAutomaticTypeConversion(result, expectedResultType, llvm->irBuilder));
	+ LLVMBlockLocker locker(llvm, false);
	+ llvm::BasicBlock *blockEntry = llvm::BasicBlock::Create(llvm->llvmContext, FN_BLOCK_ENTRY, raw);
	+ builder.SetInsertPoint(blockEntry);
	+ compileProlog();
	+ llvm::Value* result = getBruteScope(__entry)->compile();
	+ assert(result);

	- if (blockCurrent) {
	- builder.SetInsertPoint(blockCurrent);
	- }
	+ builder.CreateRet(typeinference::doAutomaticTypeConversion(result, expectedResultType, llvm->irBuilder));

	- llvm->moveToGarbage(ft);
	- return raw;
	+ llvm->moveToGarbage(ft);
	+ return raw;
	}

	IBruteScope*
	IBruteFunction::getBruteScope(const CodeScope * const scope) {
	if (__scopes.count(scope)) {
	auto result = __scopes.at(scope).lock();

	if (result) {
	return result.get();
	}
	}

	std::shared_ptr<IBruteScope> unit(pass->buildCodeScopeUnit(scope, this));

	if (scope->__parent != nullptr) {
	auto parentUnit = Decorators<CachedScopeDecoratorTag>::getInterface(getBruteScope(scope->__parent));
	parentUnit->registerChildScope(unit);

	} else {
	__orphanedScopes.push_back(unit);
	}

	if (!__scopes.emplace(scope, unit).second) {
	__scopes[scope] = unit;
	}

	return unit.get();
	}

	IBruteScope*
	IBruteFunction::getScopeUnit(ManagedScpPtr scope) {
	return getBruteScope(&*scope);
	}

	IBruteScope*
	IBruteFunction::getEntry() {
	return getBruteScope(__entry);
	}

	std::vector<llvm::Type*>
	IBruteFunction::getScopeSignature(CodeScope* scope){
	LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	AST* ast = IBruteFunction::pass->man->root;
	std::vector<llvm::Type*> result;

	std::transform(scope->__bindings.begin(), scope->__bindings.end(), std::inserter(result, result.end()),
	[llvm, ast, scope](const std::string & argAlias)->llvm::Type* {
	assert(scope->__identifiers.count(argAlias));

	ScopedSymbol argS{scope->__identifiers.at(argAlias), versions::VERSION_NONE};
	const Expression& argE = scope->__declarations.at(argS);
	const ExpandedType& argT = ast->expandType(argE.type);

	return llvm->toLLVMType(argT, argE);
	});

	- if(scope->trackExternalSymbs){
	- std::transform(scope->boundExternalSymbs.begin(), scope->boundExternalSymbs.end(), std::inserter(result, result.end()),
	- [llvm, ast](const Symbol& argS){
	- const Expression& argE = CodeScope::getDefinition(argS);
	- const ExpandedType& argT = ast->expandType(argE.type);
	-
	- return llvm->toLLVMType(argT, argE);
	- });
	- }
	-
	return result;
	}

	template<>
	compilation::IBruteFunction*
	CompilePassCustomDecorators<void, void>
	::buildFunctionUnit(const ManagedFnPtr& function) {
	return new BruteFunctionDefault(function, this);

	}

	template<>
	compilation::IBruteScope*
	CompilePassCustomDecorators<void, void>
	::buildCodeScopeUnit(const CodeScope * const scope, IBruteFunction* function) {
	return new DefaultCodeScopeUnit(scope, function, this);
	}

	std::string
	BasicBruteScope::getIndexStr(const Expression& index){
	switch(index.__state){

	//named struct field
	case Expression::STRING:
	return index.getValueString();
	break;

	//anonymous struct field
	case Expression::NUMBER:
	return to_string((int) index.getValueDouble());
	break;

	default:
	assert(false && "Wrong index for a struct");
	}
	return "";
	}

	} // end of compilation

	compilation::IBruteFunction*
	CompilePass::getBruteFn(const ManagedFnPtr& function) {
	unsigned int id = function.id();

	if (!functions.count(id)) {
	compilation::IBruteFunction* unit = buildFunctionUnit(function);
	functions.emplace(id, unit);
	return unit;
	}

	return functions.at(id);
	}

	void
	CompilePass::prepare(){
	//Initialization:
	#ifndef XREATE_CONFIG_MIN
	#endif
	managerTransformations = new xreate::compilation::TransformationsManager();
	targetInterpretation = new interpretation::TargetInterpretation(man, this);
	+
	+ __tableContext->compile();
	}

	void
	CompilePass::run() {
	prepare();

	//Determine entry function:
	StaticModel modelEntry = man->transcend->query(analysis::FN_ENTRY_PREDICATE);

	if (man->options.requireEntryFn){
	assert(modelEntry.size() && "Error: No entry function found");
	assert(modelEntry.size() == 1 && "Error: Ambiguous entry function");
	}

	if(modelEntry.size()){
	string fnEntryName = std::get<0>(TranscendLayer::parse<std::string>(modelEntry.begin()->second));
	compilation::IBruteFunction* fnEntry = getBruteFn(man->root->findFunction(fnEntryName));
	__fnEntryRaw = fnEntry->compile();
	}

	//Compile exterior functions:
	StaticModel modelExterior = man->transcend->query(analysis::FN_EXTERIOR_PREDICATE);
	for(const auto entry: modelExterior){
	string fnName = std::get<0>(TranscendLayer::parse<std::string>(entry.second));
	getBruteFn(man->root->findFunction(fnName))->compile();
	}
	}

	llvm::Function*
	CompilePass::getEntryFunction() {
	return __fnEntryRaw;
	}

	void
	CompilePass::prepareQueries(TranscendLayer* transcend) {
	#ifndef XREATE_CONFIG_MIN
	transcend->registerQuery(new latex::LatexQuery(), QueryId::LatexQuery);
	#endif

	transcend->registerQuery(new containers::Query(), QueryId::ContainersQuery);
	transcend->registerQuery(new demand::DemandQuery(), QueryId::DemandQuery);
	transcend->registerQuery(new polymorph::PolymorphQuery(), QueryId::PolymorphQuery);
	+ transcend->registerQuery(new ContextAllocQuery(), QueryId::ContextAllocQuery);
	}

	+CompilePass::CompilePass(PassManager* manager)
	+ : AbstractPass<void>(manager),
	+ __contextMan(new compilation::ContextManager(this)),
	+ __tableContext(new compilation::GlobalContextTable(this))
	+{}
	+
	} //end of namespace xreate

	/**
	* \class xreate::CompilePass
	* \brief The owner of the compilation process. Performs fundamental compilation activities along with the xreate::compilation's routines
	*
	* xreate::CompilePass traverses over xreate::AST tree and produces executable code.
	* The pass performs compilation using the following data sources:
	* - %Attachments: the data gathered by the previous passes. See \ref xreate::Attachments.
	* - Transcend solutions accessible via queries. See \ref xreate::IQuery, \ref xreate::TranscendLayer.
	*
	* The pass generates a bytecode by employing \ref xreate::LLVMLayer(wrapper over LLVM toolchain).
	* Many compilation activities are delegated to more specific routines. Most notable delegated compilation aspects are:
	* - Containers support. See \ref xreate::containers.
	* - Latex compilation. See \ref xreate::latex.
	* - Interpretation support. See \ref xreate::interpretation.
	* - Loop saturation support. See \ref xreate::compilation::TransformationsScopeDecorator.
	* - External code interaction support. See \ref xreate::ExternLayer (wrapper over Clang library).
	*
	* \section adaptability_sect Adaptability
	* xreate::CompilePass's behaviour can be adapted in several ways:
	* - %Function Decorators to alter function-level compilation. See \ref xreate::compilation::IBruteFunction
	* - Code Block Decorators to alter code block level compilation. See \ref xreate::compilation::ICodeScopeUnit.
	* Default functionality defined by \ref xreate::compilation::DefaultCodeScopeUnit
	* - Targets to allow more versitile extensions.
	* Currently only xreate::interpretation::TargetInterpretation use Targets infrastructure. See \ref xreate::compilation::Target.
	* - Altering %function invocation. See \ref xreate::compilation::IFnInvocation.
	*
	* Clients are free to construct a compiler instantiation with the desired decorators by using \ref xreate::compilation::CompilePassCustomDecorators.
	* As a handy alias, `CompilePassCustomDecorators<void, void>` constructs the default compiler.
	*
	*/
	diff --git a/cpp/src/pass/compilepass.h b/cpp/src/pass/compilepass.h
	index d050a82..94e3dd7 100644
	--- a/cpp/src/pass/compilepass.h
	+++ b/cpp/src/pass/compilepass.h
	@@ -1,236 +1,247 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	*
	* compilepass.h
	*/

	#ifndef COMPILEPASS_H
	#define COMPILEPASS_H

	#include "abstractpass.h"
	#include "llvm/IR/Function.h"

	namespace xreate {
	class TranscendLayer;
	class CompilePass;
	class LLVMLayer;

	namespace interpretation{
	class TargetInterpretation;
	}
	+
	+ namespace compilation{
	+ class GlobalContextTable;
	+ }
	}

	namespace xreate { namespace compilation {

	class IBruteScope;
	class IBruteFunction;
	class TransformationsManager;
	+class ContextManager;

	/** \brief Holds current position in %AST while traversing*/
	struct Context{
	IBruteScope* scope;
	IBruteFunction* function;
	CompilePass* pass;
	};

	/** \brief Interface for custom function invocation operation compilation
	* \details Default implementation is xreate::compilation::BruteFnInvocation
	*/
	class IFnInvocation {
	public:
	/** \brief Returns result of custom function invocation for the given arguments*/
	virtual llvm::Value* operator() (std::vector<llvm::Value *>&& args, const std::string& hintDecl="") = 0;
	};

	/** \brief Default IFnInvocation implementation */
	class BruteFnInvocation: public IFnInvocation{
	public:
	BruteFnInvocation(llvm::Function* callee, LLVMLayer* l)
	: __callee(callee), __calleeTy(callee->getFunctionType()), llvm(l) {}
	BruteFnInvocation(llvm::Value* callee, llvm::FunctionType* ty, LLVMLayer* l)
	: __callee(callee), __calleeTy(ty), llvm(l) {}

	/** \brief Makes type conversions and returns LLVM call statement with given arguments*/
	llvm::Value* operator() (std::vector<llvm::Value *>&& args, const std::string& hintDecl="");

	protected:
	llvm::Value* __callee;
	llvm::FunctionType* __calleeTy;
	LLVMLayer* llvm;
	};

	/** \brief %Function invocation operator decorator to handle latex enabled functions with hidden extra arguments */
	class HiddenArgsFnInvocation : public compilation::IFnInvocation{
	public:
	HiddenArgsFnInvocation(std::vector<llvm::Value > args, compilation::IFnInvocation parent)
	: __args(args), __parent(parent){}

	llvm::Value operator()(std::vector<llvm::Value > &&args, const std::string &hintDecl = "");

	private:
	std::vector<llvm::Value *> __args;
	compilation::IFnInvocation *__parent;
	};

	/** \brief Interface to allow modification of CodeScope compilation
	* \details Default implementation defined in xreate::compilation::DefaultCodeScopeUnit
	*/
	class IBruteScope{
	public:
	CompilePass* const pass;
	IBruteFunction* const function;
	const CodeScope* const scope;
	llvm::BasicBlock* lastBlockRaw;

	IBruteScope(const CodeScope* const codeScope, IBruteFunction* f, CompilePass* compilePass);
	virtual ~IBruteScope();

	- virtual llvm::Value* compile(const std::string& hintBlockDecl="")=0;
	+ virtual llvm::Value* compile()=0;
	virtual llvm::Value* processSymbol(const Symbol& s, std::string hintRetVar="")=0;
	virtual llvm::Value* process(const Expression& expr, const std::string& hintVarDecl="", const TypeAnnotation& expectedT = TypeAnnotation())=0;

	virtual Symbol bindArg(llvm::Value* value, std::string&& alias)=0;
	virtual void bindArg(llvm::Value* value, const ScopedSymbol& s)=0;
	- virtual void bindExternalSymb(llvm::Value*, const Symbol& s) = 0;
	+ virtual void bindExternalArg(llvm::Value*, const Symbol& s) = 0;
	virtual void reset() = 0;

	protected:
	/** \brief For subclasses to implement this method to define a function name resolution*/
	virtual IFnInvocation* findFunction(const Expression& opCall)=0;
	};

	/** \brief Minimal useful IBruteScope implementation suited for inheritance */
	class BasicBruteScope: public IBruteScope{
	public:
	BasicBruteScope(const CodeScope* const codeScope, IBruteFunction* f, CompilePass* compilePass);

	llvm::Value* processSymbol(const Symbol& s, std::string hintRetVar="") override;
	llvm::Value* process(const Expression& expr, const std::string& hintAlias="", const TypeAnnotation& expectedT = TypeAnnotation()) override;
	- llvm::Value* compile(const std::string& hintBlockDecl="") override;
	+ llvm::Value* compile() override;

	protected:
	IFnInvocation* findFunction(const Expression& opCall) override;

	private:
	std::string getIndexStr(const Expression& index);
	};

	/** \brief Interface to specify compilation of %Function */
	class IBruteFunction{
	public:
	IBruteFunction(CodeScope* entry, CompilePass* p):
	isLambda(false), pass(p), __entry(entry){}
	virtual ~IBruteFunction();

	llvm::Function* compile();
	IBruteScope* getEntry();
	virtual ManagedFnPtr getASTFn() const {return ManagedFnPtr();};
	IBruteScope* getBruteScope(const CodeScope * const scope);
	IBruteScope* getScopeUnit(ManagedScpPtr scope);
	virtual std::string prepareName() = 0;

	llvm::Function* raw = nullptr;
	bool isLambda;

	protected:
	CompilePass* pass=nullptr;
	CodeScope* __entry;

	virtual std::vector<llvm::Type*> prepareSignature() = 0;
	virtual llvm::Function::arg_iterator prepareBindings() = 0;
	virtual llvm::Type* prepareResult() = 0;
	virtual void applyAttributes() = 0;
	+ virtual void compileProlog() = 0;

	private:
	std::map<const CodeScope * const, std::weak_ptr<IBruteScope>> __scopes;
	std::list<std::shared_ptr<IBruteScope>> __orphanedScopes;

	protected:
	std::vector<llvm::Type> getScopeSignature(CodeScope scope);
	};

	/** \brief Minimal useful IBruteFunction implementation suited for inheritance */
	class BasicBruteFunction: public IBruteFunction{
	public:
	BasicBruteFunction(ManagedFnPtr f, CompilePass* p)
	: IBruteFunction(f->getEntryScope(), p), __function(f) {}

	std::string prepareName() override;

	protected:
	- virtual std::vector<llvm::Type*> prepareSignature() override;
	- virtual llvm::Type* prepareResult() override;
	- virtual llvm::Function::arg_iterator prepareBindings() override;
	- virtual void applyAttributes() override;
	- virtual ManagedFnPtr getASTFn() const {return __function;};
	+ virtual std::vector<llvm::Type*> prepareSignature() override;
	+ virtual llvm::Type* prepareResult() override;
	+ virtual llvm::Function::arg_iterator prepareBindings() override;
	+ virtual void applyAttributes() override;
	+ virtual ManagedFnPtr getASTFn() const {return __function;};
	+ virtual void compileProlog() override {};

	protected:
	ManagedFnPtr __function;
	};
	} // end of namespace compilation

	class CompilePass : public AbstractPass<void> {
	- friend class compilation::BasicBruteScope;
	- friend class compilation::IBruteFunction;
	+ friend class compilation::BasicBruteScope;
	+ friend class compilation::IBruteFunction;

	public:
	- compilation::TransformationsManager* managerTransformations;
	- interpretation::TargetInterpretation* targetInterpretation;
	-
	- CompilePass(PassManager* manager): AbstractPass<void>(manager) {}
	- /** \brief Executes compilation process */
	- void run() override;
	-
	- /**\brief Returns compiled specified %Function
	- * \details Executes function compilation or read cache if it's already done
	- */
	- compilation::IBruteFunction* getBruteFn(const ManagedFnPtr& function);
	-
	- /*\brief Returns compiled main(entry) %Function in program /
	- llvm::Function* getEntryFunction();
	-
	- /** \brief Initializes queries required by compiler. See xreate::IQuery, xreate::TranscendLayer */
	- static void prepareQueries(TranscendLayer* transcend);
	- void prepare();
	+ compilation::TransformationsManager* managerTransformations;
	+ interpretation::TargetInterpretation* targetInterpretation;
	+
	+ CompilePass(PassManager* manager);
	+ /** \brief Executes compilation process */
	+ void run() override;
	+
	+ /**\brief Returns compiled specified %Function
	+ * \details Executes function compilation or read cache if it's already done
	+ */
	+ compilation::IBruteFunction* getBruteFn(const ManagedFnPtr& function);
	+
	+ /*\brief Returns compiled main(entry) %Function in program /
	+ llvm::Function* getEntryFunction();
	+
	+ /** \brief Initializes queries required by compiler. See xreate::IQuery, xreate::TranscendLayer */
	+ static void prepareQueries(TranscendLayer* transcend);
	+ void prepare();
	+ compilation::ContextManager* getContextManager(){return __contextMan; }
	+ compilation::GlobalContextTable* getGlobalContextTable(){return __tableContext;}

	protected:
	- virtual compilation::IBruteFunction* buildFunctionUnit(const ManagedFnPtr& function)=0;
	- virtual compilation::IBruteScope* buildCodeScopeUnit(const CodeScope* const scope, compilation::IBruteFunction* function)=0;
	+ virtual compilation::IBruteFunction* buildFunctionUnit(const ManagedFnPtr& function)=0;
	+ virtual compilation::IBruteScope* buildCodeScopeUnit(const CodeScope* const scope, compilation::IBruteFunction* function)=0;

	private:
	- //TODO free `functions` in destructor
	- std::map<unsigned int, compilation::IBruteFunction*> functions;
	- llvm::Function* __fnEntryRaw = 0;
	+ //TODO free `functions` in destructor
	+ std::map<unsigned int, compilation::IBruteFunction*> functions;
	+ llvm::Function* __fnEntryRaw = 0;
	+ compilation::ContextManager* __contextMan;
	+ compilation::GlobalContextTable* __tableContext;
	};

	namespace compilation{

	/** \brief Constructs compiler with desired %Function and %Code Scope decorators. See adaptability in xreate::CompilePass*/
	template<class FUNCTION_DECORATOR=void, class SCOPE_DECORATOR=void>
	class CompilePassCustomDecorators: public ::xreate::CompilePass{
	public:
	CompilePassCustomDecorators(PassManager* manager): ::xreate::CompilePass(manager) {}

	virtual compilation::IBruteFunction* buildFunctionUnit(const ManagedFnPtr& function) override{
	return new FUNCTION_DECORATOR(function, this);
	}

	virtual compilation::IBruteScope* buildCodeScopeUnit(const CodeScope* const scope, IBruteFunction* function) override{
	return new SCOPE_DECORATOR(scope, function, this);
	}
	};

	template<>
	compilation::IBruteFunction*
	CompilePassCustomDecorators<void, void>::buildFunctionUnit(const ManagedFnPtr& function);

	template<>
	compilation::IBruteScope*
	CompilePassCustomDecorators<void, void>::buildCodeScopeUnit(const CodeScope* const scope, IBruteFunction* function);

	}} //end of namespace xreate::compilation

	#endif // COMPILEPASS_H
	diff --git a/cpp/src/query/contextalloc.cpp b/cpp/src/query/contextalloc.cpp
	new file mode 100644
	index 0000000..c7b11d5
	--- /dev/null
	+++ b/cpp/src/query/contextalloc.cpp
	@@ -0,0 +1,58 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: alloca.cpp
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 26/05/2020
	+ */
	+#include "contextalloc.h"
	+#include "analysis/resources.h"
	+
	+namespace xreate{
	+
	+void
	+ContextAllocQuery::init(TranscendLayer* transcend){
	+ const StaticModel model1 = transcend->query(analysis::VAR_ALLOCA_P);
	+ for (const auto& entry: model1){
	+ ASTSitePacked symb;
	+ Gringo::Symbol ann;
	+
	+ std::tie(symb, ann) = TranscendLayer::parse<ASTSitePacked, Gringo::Symbol>(entry.second);
	+ std::string padS = std::get<0>(TranscendLayer::parse(schemeT<analysis::VAR_ALLOCA_SCHEME>(), ann));
	+ __model.emplace(padS, transcend->unpack(symb));
	+ }
	+
	+ const StaticModel& model2 = transcend->query(analysis::FN_ALLOCAPAD_P);
	+ for (const auto& entry: model2){
	+ std::string fnS;
	+ Gringo::Symbol ann;
	+
	+ std::tie(fnS, ann) = TranscendLayer::parse<std::string, Gringo::Symbol>(entry.second);
	+ std::string padS = std::get<0>(TranscendLayer::parse(schemeT<analysis::FN_ALLOCAPAD_SCHEME>(), ann));
	+ ManagedFnPtr fn = transcend->ast->findFunction(fnS);
	+ __modelPads.emplace(fn, padS);
	+ }
	+}
	+
	+std::list<ASTSite>
	+ContextAllocQuery::getSymbols(const std::string& pad){
	+ std::list<ASTSite> result;
	+ auto range = __model.equal_range(pad);
	+ for(auto entryIt = range.first; entryIt != range.second; ++entryIt){
	+ result.push_back(entryIt->second);
	+ }
	+
	+ return result;
	+}
	+
	+std::string
	+ContextAllocQuery::getContextPad(const ManagedFnPtr& fn){
	+ if(!__modelPads.count(fn)){
	+ return "";
	+ }
	+
	+ return __modelPads.at(fn);;
	+}
	+}//xreate
	\ No newline at end of file
	diff --git a/cpp/src/query/contextalloc.h b/cpp/src/query/contextalloc.h
	new file mode 100644
	index 0000000..c998ff3
	--- /dev/null
	+++ b/cpp/src/query/contextalloc.h
	@@ -0,0 +1,37 @@
	+/* This Source Code Form is subject to the terms of the Mozilla Public
	+ * License, v. 2.0. If a copy of the MPL was not distributed with this
	+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
	+ *
	+ * File: alloca.h
	+ * Author: pgess <v.melnychenko@xreate.org>
	+ *
	+ * Created on 26/05/2020
	+ */
	+#ifndef XREATE_CONTEXTALLOC_H
	+#define XREATE_CONTEXTALLOC_H
	+
	+#include "transcendlayer.h"
	+
	+namespace xreate{
	+
	+namespace compilation {
	+ class AllocContext;
	+};
	+
	+class ContextAllocQuery : public IQuery{
	+public:
	+ typedef std::multimap<std::string, ASTSite> Model;
	+
	+ std::list<ASTSite> getSymbols(const std::string& pad);
	+ std::string getContextPad(const ManagedFnPtr& fn);
	+ const Model& getModel() const {return __model; }
	+
	+ virtual void init(TranscendLayer* transcend) override;
	+
	+private:
	+ Model __model;
	+ std::map<ManagedFnPtr, std::string> __modelPads;
	+};
	+
	+} //xreate
	+#endif //XREATE_CONTEXTALLOC_H
	diff --git a/cpp/src/transcendlayer.h b/cpp/src/transcendlayer.h
	index 59634cc..6367409 100644
	--- a/cpp/src/transcendlayer.h
	+++ b/cpp/src/transcendlayer.h
	@@ -1,311 +1,328 @@
	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	* File: transcendlayer.h
	*/

	#ifndef transcendLAYER_H
	#define transcendLAYER_H

	#include "ast.h"
	#include "contextrule.h"

	#include <clingo/clingocontrol.hh>
	#include <string>
	#include <climits>
	#include <unordered_map>
	#include <boost/bimap.hpp>
	#include <boost/bimap/multiset_of.hpp>
	#include <boost/optional.hpp>
	#include <boost/scoped_ptr.hpp>
	#include <list>
	#include <limits>

	namespace xreate {

	typedef unsigned int ScopePacked;
	const ScopePacked SCOPE_ABSTRACT_GLOBAL = std::numeric_limits<ScopePacked>::max();

	struct SymbolPacked {
	SymbolPacked(){}
	SymbolPacked(ScopedSymbol i, ScopePacked s): identifier(i.id), version(i.version), scope(s){}
	SymbolPacked(VNameId symbolId, versions::VariableVersion symbolVersion, ScopePacked symbolScope)
	: identifier(symbolId), version(symbolVersion), scope(symbolScope){}

	VNameId identifier;
	versions::VariableVersion version;
	ScopePacked scope;
	};


	bool operator==(const SymbolPacked& s1, const SymbolPacked& s2);
	bool operator<(const SymbolPacked& s1, const SymbolPacked& s2);

	struct ASTSitePacked {
	union {
	ASTSite site;
	SymbolPacked symbol;
	};
	enum { SYMBOL, ANON } tag;

	ASTSitePacked(){}
	explicit ASTSitePacked(const ASTSite& data): site(data), tag(ASTSitePacked::ANON) {}
	explicit ASTSitePacked(const SymbolPacked& data): symbol(data), tag(ASTSitePacked::SYMBOL){}
	std::string str() const;
	};

	//bool operator==(const Site& s1, const Site& s2);

	//template<>
	//struct AttachmentsId<Site>{
	// static unsigned int getId(const Site& symbol);
	//};

	} namespace std {

	// template<>
	// struct hash<xreate::SymbolNode> {
	// std::size_t operator()(xreate::SymbolNode const& s) const noexcept;
	// };
	//
	// template<>
	// struct hash<xreate::Site> {
	// std::size_t operator()(xreate::Site const& s) const noexcept;
	// };
	}

	namespace xreate {

	enum class DFGConnection {
	STRONG, WEAK, PROTOTYPE
	};

	/** \brief Supplies \ref TranscendLayer with results of an analysis*/
	class IAnalysisReport {
	public:
	/** \brief Composes a logic program to represent the analysis data in ASP format, and appends to a stream*/
	virtual void print(std::ostringstream& output) const = 0;
	virtual ~IAnalysisReport(){};
	};

	/** \brief Transcend solutions querying interface */
	class IQuery {
	public:
	virtual void init(TranscendLayer* transcend) = 0;
	virtual ~IQuery() {}
	};

	enum class QueryId {
	ContainersQuery,
	PolymorphQuery,
	LatexQuery,
	- DemandQuery
	+ DemandQuery,
	+ ContextAllocQuery
	};

	namespace dfa{
	class DFAGraph;
	}

	namespace cfa {
	class CFAGraph;
	}

	template<typename Tuple> struct schemeT{};
	typedef std::multimap<std::string, Gringo::Symbol> StaticModel;
	typedef StaticModel::const_iterator StaticModelIterator;

	class TranscendLayer {
	friend class ContextRule;

	/*\name Data Providers Management /
	///@{
	public:
	void registerReport(IAnalysisReport* report);
	void printReports();
	void deleteReports();

	/** \brief Appends arbitrary string to a logic program
	*/
	void addRawScript(std::string&& script);

	private:
	std::list<IAnalysisReport*> __reports;

	/** Includes external text files to a logic program */
	void appendImport();
	///@}

	/*\name Queries Management /
	///@{
	public:
	/** \brief Registers a query. See xreate::IQuery */
	IQuery* registerQuery(IQuery* query, const QueryId& id);

	/** \brief Returns a particular query. See xreate::IQuery */
	IQuery* getQuery(const QueryId& id);

	template<class ...Types>
	static std::tuple<Types...> parse(const Gringo::Symbol& atom);

	template<class ...Types>
	static std::tuple<Types...> parse(schemeT<std::tuple<Types...>>, const Gringo::Symbol& atom);
	+
	+ template<class Scheme>
	+ std::set<Scheme> queryByScheme(const std::string& predicate);
	+
	template<class Ret>
	static Ret parseAtom(const Gringo::Symbol& atom);

	StaticModel query(const std::string& atom) const;
	size_t getScopesCount() const;
	SymbolPacked pack(const Symbol& symbol, std::string hintSymbolName = "");
	ScopePacked pack(const CodeScope * const scope);
	Symbol unpack(const SymbolPacked& symbol) const;
	// SymbolNode pack(const Site& symbol, const std::string& hintSymbolName);
	// Site unpack(const SymbolNode& symbol) const;
	std::string getHintForPackedSymbol(const SymbolPacked& symbol);
	ASTSitePacked pack(const ASTSite& s);
	ASTSite unpack(const ASTSitePacked& s);
	///@}

	private:
	std::map<QueryId, IQuery*> __queries;
	std::map<SymbolPacked, std::string> __indexSymbolNameHints;
	std::unordered_map<const CodeScope*, unsigned int> __indexScopes;
	std::vector<const CodeScope*> __registryScopes;

	/*\name Diagnostic /
	///@{
	//TODO diagnostic move over to separate provider/query
	public:
	/** \brief Registers diagnostic rules */
	void addRuleWarning(const RuleWarning &rule);

	/** \brief Registers diagnostic messages */
	unsigned int registerWarning(std::string &&message);

	private:
	std::map<unsigned int, std::string> __warnings;
	void printWarnings(std::ostream& out);
	///@}

	///@{
	public:
	TranscendLayer();

	/** \brief Executes reasoning */
	void run();
	///@}
	AST *ast;

	protected:
	virtual bool processSolution(Gringo::Model const &model);

	private:
	StaticModel __model;
	std::ostringstream __partTags;
	std::ostringstream __partGeneral;
	};

	template<class typ>
	struct ParseImplAtom {
	static typ get(const Gringo::Symbol& atom) {
	return atom.num();
	}
	};

	template<>
	struct ParseImplAtom<int> {
	static int get(const Gringo::Symbol& atom);
	};

	template<>
	struct ParseImplAtom<std::string> {
	static std::string get(const Gringo::Symbol& atom);
	};

	template<>
	struct ParseImplAtom<SymbolPacked> {
	static SymbolPacked get(const Gringo::Symbol& atom);
	};

	template<>
	struct ParseImplAtom<Gringo::Symbol> {
	static Gringo::Symbol get(const Gringo::Symbol& atom);
	};

	template<>
	struct ParseImplAtom<ASTSitePacked> {
	static ASTSitePacked get(const Gringo::Symbol& atom);
	};

	template<class ItemType>
	struct ParseImplAtom<std::list<ItemType>>{
	static std::list<ItemType>
	get(const Gringo::Symbol& atom){
	bool flagIsList = (atom.type() == Gringo::SymbolType::Fun) && atom.name().empty();
	std::list<ItemType> result;

	if(!flagIsList) {
	//treat as degenerate case: list with a single element
	result.push_back(ParseImplAtom<ItemType>::get(atom));
	return result;
	}

	for (const Gringo::Symbol& arg: atom.args()) {
	result.push_back(ParseImplAtom<ItemType>::get(arg));
	}

	return result;
	}
	};

	template<>
	struct ParseImplAtom<Expression> {
	static Expression get(const Gringo::Symbol& atom);
	};

	template<class Tuple, size_t index>
	struct Parse_Impl {
	static void parse(Tuple& tup, Gringo::SymSpan::iterator arg) {
	const size_t tupleSize = std::tuple_size<Tuple>::value;
	typedef typename std::tuple_element < tupleSize - index, Tuple>::type ElType;

	ElType& el = std::get < tupleSize - index > (tup);

	Gringo::Symbol atom = *arg;
	el = ParseImplAtom<ElType>::get(atom);

	Parse_Impl<Tuple, index - 1 > ::parse(tup, ++arg);
	}
	};

	template<class Tuple>
	struct Parse_Impl<Tuple, 0> {
	static void parse(Tuple& tup, Gringo::SymSpan::iterator arg) {
	}
	};

	template<class ...Types>
	std::tuple<Types...>
	TranscendLayer::parse(const Gringo::Symbol& atom) {
	typedef std::tuple < Types...> Tuple;
	Tuple tup;
	Parse_Impl<Tuple, std::tuple_size<Tuple>::value>::parse(tup, atom.args().first);

	return tup;
	}

	template<class ...Types>
	std::tuple<Types...>
	TranscendLayer::parse(schemeT<std::tuple<Types...>>, const Gringo::Symbol& atom){
	return parse<Types...>(atom);
	}

	template<class Ret>
	Ret
	TranscendLayer::parseAtom(const Gringo::Symbol& atom){
	return ParseImplAtom<Ret>::get(atom);
	}

	+template<class Scheme>
	+std::set<Scheme> TranscendLayer::queryByScheme(const std::string& predicate){
	+ StaticModel model = query(predicate);
	+
	+ std::set<Scheme> result;
	+ std::transform(model.begin(), model.end(), std::inserter(result, result.begin()), [](const auto& entry){
	+ const Gringo::Symbol& entryS = entry.second;
	+ return parse(schemeT<Scheme>(), entryS);
	+ });
	+
	+ return result;
	+}

	} //end of xreate namespace
	#endif
	diff --git a/cpp/tests/ast.cpp b/cpp/tests/ast.cpp
	index 4e97c6a..e129f25 100644
	--- a/cpp/tests/ast.cpp
	+++ b/cpp/tests/ast.cpp
	@@ -1,307 +1,324 @@
	/* Any copyright is dedicated to the Public Domain.
	* http://creativecommons.org/publicdomain/zero/1.0/
	*
	* ast.cpp
	*
	* Created on: Jun 11, 2015
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	#include "supplemental/docutils.h"
	#include "xreatemanager.h"
	#include "main/Parser.h"
	#include "supplemental/basics.h"
	#include "gtest/gtest.h"

	using namespace std;
	using namespace xreate;
	using namespace xreate::grammar::main;

	TEST(AST, Containers1) {
	FILE* input = fopen("scripts/containers/Containers_Implementation_LinkedList1.xreate", "r");
	Scanner scanner(input);
	Parser parser(&scanner);
	parser.Parse();
	assert(!parser.errors->count && "Parser errors");

	fclose(input);
	}

	TEST(AST, InterfacesDataCFA) {
	XreateManager* man = XreateManager::prepare
	("interface(cfa){\n"
	" operator map :: annotation1.\n"
	"}");

	auto answer = man->root->__interfacesData.equal_range(CFA);
	EXPECT_EQ(1, std::distance(answer.first, answer.second));

	Expression&& scheme = move(answer.first->second);

	EXPECT_EQ(Operator::MAP, scheme.op);
	EXPECT_EQ("annotation1", scheme.getOperands().at(0).getValueString());
	}

	TEST(AST, syntax_recognizeIdentifiers) {
	XreateManager* man = XreateManager::prepare(R"Code(
	test= function(a:: num):: num; entry {
	a = b:: int.
	b = 8:: int.

	a
	}
	)Code");
	}

	TEST(AST, syntax_operatorIndex) {
	XreateManager* man = XreateManager::prepare(R"Code(
	test= function(a:: num):: num; entry {
	b = a[1].
	b
	}
	)Code");
	}

	TEST(AST, IdentHyphen1){
	XreateManager* man = XreateManager::prepare(R"Code(
	my-fn = function(m-n:: num):: num; entry
	{
	b = m-n-1:: int.
	b
	}
	)Code");
	}

	TEST(AST, Variants_switch) {
	XreateManager* man = XreateManager::prepare(R"Code(
	Color = type variant{Blue, White, Green}.

	main = function:: int {
	x = White()::Color.

	switch variant(x)::int
	case (Green) {0}
	case (White) {1}
	case (Blue){2}
	}
	)Code");

	Expression e = man->root->findFunction("main")->getEntryScope()->getBody();
	ASSERT_EQ(4, e.getOperands().size());
	ASSERT_EQ(3, e.blocks.size());
	}

	TEST(AST, TypeVariantEmpty){
	std::string code = R"(
	my-rec-t = type variant{}
	)";

	ASSERT_DEATH(XreateManager::prepare(move(code)), "-- line 2 col 29: Variant type can't be empty.");
	}

	TEST(AST, Lambda_BoundVars_1){
	string code = R"(
	myfn = function:: int {
	a = [1..5]:: [int].
	offset = 10:: int.
	loop map(a->x:: int):: [int] { x + offset:: int}
	}
	)";

	auto man = details::tier1::XreateManager::prepare(move(code));
	CodeScope* scopeEntry = man->root->findFunction("myfn")->getEntryScope();
	const string& offsetAlias = "offset";
	ScopedSymbol offsetS = scopeEntry->findSymbolByAlias(offsetAlias);

	CodeScope* scopeMap = scopeEntry->getBody().blocks.front();
	- ASSERT_EQ(1, scopeMap->boundExternalSymbs.size());
	- ASSERT_TRUE(scopeMap->boundExternalSymbs.count(Symbol{offsetS, scopeEntry}));
	+ ASSERT_EQ(1, scopeMap->boundArgs.size());
	+ ASSERT_TRUE(scopeMap->boundArgs.count(Symbol{offsetS, scopeEntry}));
	+}
	+
	+TEST(AST, Annotations1){
	+ string code = R"(
	+ my-ann = type variant{
	+ ann1,
	+ ann2(x:: int),
	+ ann3(x:: string)
	+ }.
	+
	+ test = function:: int; entry() {
	+ 0 :: int; ann1(); ann2(1); ann3("2")
	+ }
	+ )";
	+
	+ XreateManager* man = XreateManager::prepare(move(code));
	+ man->run();
	}

	TEST(AST, DISABLED_InterfacesDataDFA) { }

	TEST(AST, DISABLED_InterfacesDataExtern) { }

	TEST(AST, Doc_LiteralsAndExpressions) {
	XreateManager* man = XreateManager::prepare(
	R"Code(

	Record1 = type {year:: int, month:: string}.
	isOdd = function(x :: int) :: bool {true}

	test = function:: bool; entry {
	x1 = 5 :: int.
	x2 = "Nimefurahi kukujua":: string.
	x3 = {year = 1934, month = "april"}:: Record1.
	x4 = {16, 8, 3} :: [int].
	x41 = [1..18]:: [int].
	x5 = 8>=3:: bool.
	x6 = "Blue" <> "Green" :: bool.
	x7 = -true:: bool.
	colors = {"Green", "Blue"} :: [string].
	color = colors[0] :: string.
	date = {year = 1934, month = "april"}:: Record1. year = date["year"] :: int.
	a = 0::int. b = 0 :: int.
	x7 = a - b:: int.
	result = isOdd(6) :: bool.

	true
	}

	)Code");

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_CodeBlocks1) {
	XreateManager* man = XreateManager::prepare(
	getDocumentationExampleById("documentation/Syntax/syntax.xml", "CodeBlocks1"));

	FnNoArgs resultFn = (FnNoArgs) man->run();
	int resultExpected = resultFn();
	ASSERT_EQ(12, resultExpected);
	}

	TEST(AST, Doc_Functions1) {
	XreateManager* man = XreateManager::prepare(
	getDocumentationExampleById("documentation/Syntax/syntax.xml", "Functions1"));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_FunctionSpecializations1) {
	XreateManager* man = XreateManager::prepare(
	getDocumentationExampleById("documentation/Syntax/syntax.xml", "FunctionSpecialization1"));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_BranchStatements) {
	string code_IfStatement1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "IfStatement1");
	string code_SwitchStatement1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "SwitchStatement1");

	string code =
	R"Code(
	test = function:: int; entry
	{
	question = "Favorite color?":: string.
	monthNum = 2:: int.

	%IfStatement1
	%SwitchStatement1

	monthName
	}
	)Code";
	replace(code, "%IfStatement1", code_IfStatement1);
	replace(code, "%SwitchStatement1", code_SwitchStatement1);

	XreateManager* man = XreateManager::prepare(move(code));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_LoopStatements) {
	string code_LoopStatement1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "LoopStatement1");
	string code_LoopStatement2 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "LoopStatement2");
	string code_FoldStatement1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "FoldStatement1");
	string code_MapStatement1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "MapStatement1");

	string code =
	R"Code(
	test = function:: int; entry
	{
	%LoopStatement1
	%LoopStatement2
	%FoldStatement1
	%MapStatement1

	min
	}
	)Code";

	replace(code, "%LoopStatement1", code_LoopStatement1);
	replace(code, "%LoopStatement2", code_LoopStatement2);
	replace(code, "%FoldStatement1", code_FoldStatement1);
	replace(code, "%MapStatement1", code_MapStatement1);
	XreateManager::prepare(move(code));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_Types){
	string code = getDocumentationExampleById("documentation/Syntax/syntax.xml", "Types1");
	XreateManager::prepare(move(code));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_Variants1){
	string code_Variants1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "Variants1");
	XreateManager::prepare(move(code_Variants1));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_VariantsSwitch1){
	string code_Variants1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "VariantsSwitch1");
	XreateManager::prepare(move(code_Variants1));

	ASSERT_TRUE(true);
	}

	TEST(AST, Doc_Versions1){
	string code_Variants1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "Versions1_1");
	string code_Variants2 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "Versions1_2");

	string code = R"Code(
	test = function:: int; entry
	{
	<BODY>
	y
	})Code";

	{
	std::cout << code_Variants1 << std::endl;
	XreateManager* man = XreateManager::prepare(move(code_Variants1));
	man->run();
	delete man;
	ASSERT_TRUE(true);
	}

	// {
	// replace(code, "<BODY>", code_Variants2);
	// auto man = details::tier1::XreateManager::prepare(move(code));
	// ASSERT_DEATH(man->analyse(), ".versions graph.");
	// }
	}

	TEST(AST, Intrinsics1){
	string code = R"Code(
	test = function:: [int]
	{
	intrinsic array_init(8):: [int]
	})Code";

	XreateManager* man = XreateManager::prepare(move(code));
	const Expression bodyE = man->root->findFunction("test")->getEntryScope()->getBody();

	ASSERT_EQ(Operator::CALL_INTRINSIC, bodyE.op);
	ASSERT_EQ(IntrinsicFn ::ARR_INIT, (IntrinsicFn) bodyE.getValueDouble());
	}

	TEST(AST, TypeRecordEmpty){
	std::string code = R"(
	my-rec-t = type {}
	)";

	ASSERT_DEATH(XreateManager::prepare(move(code)), "-- line 2 col 22: Record type can't be empty.");
	}

	TEST(AST, PredPredicates1){
	string code = R"(
	my-fn = function:: int; entry() {0}
	)";

	auto man = XreateManager::prepare(move(code));
	}
	\ No newline at end of file
	diff --git a/cpp/tests/compilation.cpp b/cpp/tests/compilation.cpp
	index 46688e9..82dad70 100644
	--- a/cpp/tests/compilation.cpp
	+++ b/cpp/tests/compilation.cpp
	@@ -1,378 +1,422 @@
	/* Any copyright is dedicated to the Public Domain.
	* http://creativecommons.org/publicdomain/zero/1.0/
	*
	* compilation.cpp
	*
	* Created on: -
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	#include "xreatemanager.h"
	#include "supplemental/basics.h"
	#include "llvmlayer.h"
	#include "pass/compilepass.h"
	#include "compilation/lambdas.h"

	#include "gtest/gtest.h"

	using namespace xreate;
	using namespace xreate::compilation;
	using namespace std;
	//DEBT implement no pkgconfig ways to link libs
	//TOTEST FunctionUnit::compileInline

	TEST(Compilation, functionEntry1){
	std::unique_ptr<XreateManager> program(XreateManager::prepare(
	"func1 = function(a:: int):: int {a+8} \
	func2 = function::int; entry {12 + func1(4)} \
	"));

	void* entryPtr = program->run();
	int (entry)() = (int ()())(intptr_t)entryPtr;

	int answer = entry();
	ASSERT_EQ(24, answer);
	}

	TEST(Compilation, full_IFStatementWithVariantType){
	XreateManager* man = XreateManager::prepare(
	"Color = type variant {RED, BLUE, GREEN}.\n"
	"\n"
	" main = function(x::int):: bool; entry {\n"
	" color = if (x == 0 )::Color {RED()} else {BLUE()}.\n"
	" if (color == BLUE())::bool {true} else {false}\n"
	" }"
	);

	bool (main)(int) = (bool ()(int)) man->run();
	ASSERT_FALSE(main(0));
	ASSERT_TRUE(main(1));
	}

	TEST(Compilation, full_Variant1){
	XreateManager* man = XreateManager::prepare(R"Code(
	global = type predicate {
	entry
	}

	Command= type variant{
	Add(x::int, y::int),
	Dec(x::int)
	}.

	main = function::Command; entry() {
	Dec(2) ::Command
	}
	)Code");

	void (main)() = (void ()()) man->run();
	}

	TEST(Compilation, full_SwitchVariant1){
	XreateManager* man = XreateManager::prepare(R"Code(
	Command= type variant{
	Add(x::int, y::int),
	Dec(x::int)
	}.

	main = function::int; entry {
	command = Add(3, 5):: Command.

	switch variant(command)::int
	case(Add){command["x"] + command["y"]}
	case(Dec){command["x"]}
	}
	)Code");

	int (mainFn)() = (int ()()) man->run();
	int result = mainFn();
	ASSERT_EQ(8, result);
	}

	TEST(Compilation, full_SwitchVariantNoArguments2){
	XreateManager* man = XreateManager::prepare(R"Code(
	Command= type variant{Add, Dec}.

	main = function::int; entry {
	command = Dec():: Command.

	switch variant(command)::int
	case(Add){0}
	case(Dec){1}
	}
	)Code");

	int (mainFn)() = (int ()()) man->run();
	int result = mainFn();
	ASSERT_EQ(1, result);
	}

	TEST(Compilation, full_SwitchVariantMixedArguments3){
	XreateManager* man = XreateManager::prepare(R"Code(
	Command= type variant{
	Add(x::int, y::int),
	Dec
	}.

	main = function(arg::int):: int; entry {
	command = if (arg > 0)::Command {Dec()} else {Add(1, 2)}.

	switch variant(command)::int
	case(Add){0}
	case(Dec){1}
	}
	)Code");

	int (mainFn)(int) = (int ()(int)) man->run();
	int result = mainFn(5);
	ASSERT_EQ(1, result);
	}

	TEST(Compilation, full_StructUpdate){
	XreateManager* man = XreateManager::prepare(
	R"Code(

	Rec = type {
	a :: int,
	b:: int
	}.

	test= function:: int; entry {
	a = {a = 18, b = 20}:: Rec.

	b = a + {a = 11}:: Rec.
	b["a"]
	}
	)Code");

	int (main)() = (int ()()) man->run();
	int result = main();

	ASSERT_EQ(11, result);
	}

	TEST(Compilation, AnonymousStruct_init_index){
	std::string code =
	R"Code(

	main = function:: int; entry {
	x = {10, 15} :: {int, int}.
	x[1]
	}

	)Code";

	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	int (main)() = (int ()()) man->run();

	EXPECT_EQ(15, main());
	}

	TEST(Compilation, AnonymousStruct_init_update){
	std::string code =
	R"Code(

	main = function:: int; entry {
	x = {10, 15} :: {int, int}.
	y = x + {6}:: {int, int}.
	y[0]
	}

	)Code";

	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	int (main)() = (int ()()) man->run();

	EXPECT_EQ(6, main());
	}

	TEST(Compilation, BugIncorrectScopes1){
	std::string code =
	R"Code(

	init = function:: int {10}
	main = function(cmd:: int):: int; entry {
	x = init():: int.
	if(cmd > 0):: int { x + 1 } else { x }
	}
	)Code";

	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	int (mainFn)(int) = (int ()(int)) man->run();

	EXPECT_EQ(11, mainFn(1));
	}

	TEST(Compilation, Sequence1){
	std::string code =
	R"Code(
	interface(extern-c){
	libbsd = library:: pkgconfig("libbsd").

	include {
	libbsd = {"bsd/stdlib.h", "string.h"}
	}.
	}

	start = function:: i32; entry {
	seq {
	nameNew = "TestingSequence":: string.
	setprogname(nameNew)

	} {strlen(getprogname())}::i32
	}
	)Code";

	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	int (startFn)() = (int ()()) man->run();

	int nameNewLen = startFn();
	ASSERT_EQ(15, nameNewLen);
	}

	TEST(Compilation, BoolInstructions1){
	std::string code =
	R"Code(
	test = function (a:: bool, b:: bool):: bool; entry
	{
	-a
	}
	)Code";

	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	Fn2Args startFn = (Fn2Args) man->run();
	}

	TEST(Compilation, StructIndex1){
	std::string code =
	R"Code(
	Anns = type predicate {
	entry()
	}
	test = function:: int; entry()
	{
	x = {a = ({b = 3}::{b:: int})}:: {a:: {b:: int}}.
	2 + x["a", "b"] + x["a"]["b"]
	}
	)Code";

	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	FnNoArgs startFn = (FnNoArgs) man->run();
	int result = startFn();
	ASSERT_EQ(2, result);
	}

	TEST(Compilation, PreferredInt1){
	std::unique_ptr<XreateManager> man(XreateManager::prepare(""));
	TypesHelper utils(man->llvm);
	int bitwidth = utils.getPreferredIntTy()->getBitWidth();
	ASSERT_EQ(64, bitwidth);
	}

	TEST(Compilation, PredPredicates1){
	string code = R"(
	my-fn = function:: int; entry() {0}
	)";

	auto man = XreateManager::prepare(move(code));
	FnNoArgs startFn = (FnNoArgs) man->run();
	int result = startFn();
	ASSERT_EQ(0, result);
	}

	typedef intmax_t (*FnI_I)(intmax_t);
	TEST(Compilation, Lambda1){
	string code = R"(
	myfn = function:: int {
	a = [1..5]:: [int].
	loop map(a->x:: int):: [int] { x + 10:: int}
	}
	)";
	auto man = details::tier1::XreateManager::prepare(move(code));
	LLVMLayer* llvm = man->llvm;
	man->analyse();

	std::unique_ptr<CompilePass> compiler(new compilation::CompilePassCustomDecorators<>(man));
	compiler->prepare();
	- LambdaIR compilerLambda(compiler.get());
	+
	CodeScope* scopeLoop = man->root->findFunction("myfn")->getEntryScope()->getBody().blocks.front();
	- auto fnRaw = compilerLambda.compile(scopeLoop, "loop");
	+ LambdaFn lambdaFn(scopeLoop, compiler.get(), "lmb1");
	+ auto fnRaw = lambdaFn.compile();
	llvm->initJit();

	FnI_I fn = (FnI_I)llvm->getFunctionPointer(fnRaw);
	ASSERT_EQ(20, fn(10));
	}

	TEST(Compilation, Lambda_BoundVars1){
	string code = R"(
	myfn = function:: int {
	a = [1..5]:: [int].
	offset = 10:: int.
	loop map(a->x:: int):: [int] { x + offset:: int}
	}
	)";

	auto man = details::tier1::XreateManager::prepare(move(code));
	LLVMLayer* llvm = man->llvm;
	man->analyse();

	std::unique_ptr<CompilePass> compiler(new compilation::CompilePassCustomDecorators<>(man));
	compiler->prepare();
	- LambdaIR compilerLambda(compiler.get());
	CodeScope* scopeLoop = man->root->findFunction("myfn")->getEntryScope()->getBody().blocks.front();
	- auto fnRaw = compilerLambda.compile(scopeLoop, "loop");
	+ LambdaFn fnLambda(scopeLoop, compiler.get(), "lmb1");
	+ auto fnRaw = fnLambda.compile();
	llvm->print();
	llvm->initJit();

	Fn2Args fn = (Fn2Args)llvm->getFunctionPointer(fnRaw);
	- ASSERT_EQ(30, fn(10, 20));
	+ intmax_t offset = 20;
	+ ASSERT_EQ(30, fn(10, (intmax_t) &offset));
	}

	struct Tuple3 {intmax_t a; intmax_t b; intmax_t c; };
	typedef Tuple3 (*FnTuple3)();

	intmax_t fn_BUG_Triple(FnTuple3 callee){
	Tuple3 result = callee();
	return result.a+ result.b + result.c;
	}

	TEST(Compilation, BUG_Triple){
	std::unique_ptr<XreateManager> man(XreateManager::prepare(R"(
	Tuple2 = type {int, int}.
	Tuple3 = type {int, int, int}.
	Tuple4 = type {int, int, int, int}.

	main = function:: Tuple3; entry()
	{
	{1, 2, 3}
	}
	)"));
	FnTuple3 mainFn = (FnTuple3) man->run();
	intmax_t result = fn_BUG_Triple(mainFn);

	ASSERT_EQ(6, result);
	// ASSERT_EQ(2, result.b);
	// ASSERT_EQ(3, result.c);
	}

	TEST(Compilation, ExteriorFns1){
	std::unique_ptr<XreateManager> man(XreateManager::prepare(R"(
	fn-a = function:: int; exterior() {1}
	fn-b = function:: int; exterior() {2}
	)"));

	man->options.requireEntryFn = false;
	man->run();
	FnNoArgs fnA = (FnNoArgs) man->getExteriorFn("fn-a");
	ASSERT_EQ(1, fnA());

	FnNoArgs fnB = (FnNoArgs) man->getExteriorFn("fn-b");
	ASSERT_EQ(2, fnB());
	}

	TEST(Compilation, LLVMAliases){
	FILE* code = fopen("scripts/compilation/llvmaliases.xreate", "r");
	assert(code != nullptr);
	std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	man->run();
	+}
	+
	+TEST(Compilation, MMPrealloca1){
	+ string code = R"(
	+ make_arr = function(offset:: int):: [int]; csize(5) {
	+ resultInit = undef:: [int]; csize(5); alloca("main").
	+ idxs = [0..5]:: [int]; range().
	+ loop fold(idxs->i:: int, (resultInit::[int]; csize(5))->result)::[int]; csize(5)
	+ {
	+ (result::[int]; csize(5)): {[i]= i + offset}
	+ }
	+ }
	+
	+ main = function:: int; entry(); allocapad("main") {
	+ arr = make_arr(5):: [int]; csize(5).
	+ arr[2] - 7
	+ }
	+ )";
	+
	+ std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	+ FnNoArgs fnMain = (FnNoArgs) man->run();
	+ int resActual = fnMain();
	+ ASSERT_EQ(0, resActual);
	+}
	+
	+TEST(Compilation, BUG_Minus1){
	+ string code = R"(
	+ main = function:: int; entry()
	+ {
	+ a = 10:: int.
	+ b = 3:: int.
	+ c = 2:: int.
	+
	+ a - b - c
	+ }
	+)";
	+
	+ std::unique_ptr<XreateManager> man(XreateManager::prepare(move(code)));
	+ FnNoArgs fnMain = (FnNoArgs) man->run();
	+ int resActual = fnMain();
	+ ASSERT_EQ(0, resActual);
	+
	}
	\ No newline at end of file
	diff --git a/cpp/tests/containers.cpp b/cpp/tests/containers.cpp
	index a960a2d..54202e2 100644
	--- a/cpp/tests/containers.cpp
	+++ b/cpp/tests/containers.cpp
	@@ -1,365 +1,410 @@
	/* Any copyright is dedicated to the Public Domain.
	* http://creativecommons.org/publicdomain/zero/1.0/
	*
	* containers.cpp
	*
	* Created on: Jun 9, 2015
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	#include "xreatemanager.h"
	#include "query/containers.h"
	#include "main/Parser.h"
	#include "pass/compilepass.h"
	#include "llvmlayer.h"

	#include "supplemental/docutils.h"
	#include "supplemental/basics.h"
	#include "gtest/gtest.h"

	using namespace std;
	using namespace xreate::grammar::main;
	using namespace xreate::containers;
	using namespace xreate;

	struct Tuple2 {intmax_t a; intmax_t b;};
	typedef Tuple2 (*FnTuple2)();

	struct Tuple4 {intmax_t a; intmax_t b; intmax_t c; intmax_t d;};
	typedef Tuple4 (*FnTuple4)();

	TEST(Containers, RecInitByList1){
	string code = R"(
	Rec = type {x:: int, y:: int}.
	test = function(a:: int, b::int):: Rec; entry() {
	{x = a + b, y = 2}
	}
	)";

	auto man = XreateManager::prepare(move(code));
	man->run();
	}

	TEST(Containers, RecInitByList2){
	string code = R"(
	Rec = type {x:: int, y:: int}.
	test = function(a:: int, b::int):: Rec; entry() {
	{a + b, y = 2}
	}
	)";

	auto man = XreateManager::prepare(move(code));
	man->run();
	}

	TEST(Containers, RecUpdateByList1){
	string code = R"(
	Rec = type {x:: int, y:: int}.
	test = function(a:: int, b::int):: Rec; entry() {
	r = {0, y = 2}:: Rec.

	r : {a + b}
	}
	)";

	auto man = XreateManager::prepare(move(code));
	man->run();
	}

	TEST(Containers, RecUpdateByListIndex1){
	string code = R"(
	Rec = type {x:: int, y:: int}.
	test = function(a:: int, b::int):: int; entry() {
	r1 = undef:: Rec.
	r2 = r1 : {[1] = b, [0] = a}:: Rec.

	r2["x"]
	}
	)";

	auto man = XreateManager::prepare(move(code));
	Fn2Args program = (Fn2Args) man->run();
	ASSERT_EQ(10, program(10, 11));
	}

	TEST(Containers, RecUpdateInLoop1){
	FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	assert(code != nullptr);

	std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	man->transcend->addRawScript("select(function(\"fn-RecUpdateInLoop1\")).");
	man->options.requireEntryFn = false;
	man->run();

	{
	Fn1Args fn = (Fn1Args) man->getExteriorFn("fn-RecUpdateInLoop1");
	ASSERT_EQ(11, fn(10));
	}
	}

	TEST(Containers, ArrayInit1){
	XreateManager* man = XreateManager::prepare(
	R"Code(
	main = function(x:: int):: int; entry() {
	a = {1, 2, 3}:: [int].
	a[x]
	}
	)Code");

	void* mainPtr = man->run();
	Fn1Args main = (Fn1Args) mainPtr;
	ASSERT_EQ(2, main(1));

	delete man;
	}

	TEST(Containers, ArrayUpdate1){
	XreateManager* man = XreateManager::prepare(R"(
	main = function(x::int):: int; entry()
	{
	a = {1, 2, 3}:: [int]; csize(5).
	b = a : {[1] = x}:: [int]; csize(5).
	b[1]
	}
	)");

	void* mainPtr = man->run();
	Fn1Args main = (Fn1Args) mainPtr;
	ASSERT_EQ(2, main(2));

	delete man;
	}

	TEST(Containers, FlyMap1){
	std::unique_ptr<XreateManager> man(XreateManager::prepare(R"(
	main = function:: int; entry()
	{
	x = {1, 2, 3, 4}:: [int].
	y = loop map(x->el::int)::[int]; fly(csize(4))
	{2 * el:: int }.
	loop fold((y::[int]; fly(csize(4)))->el:: int, 0->sum):: int {sum + el}-20
	}
	)"));

	FnNoArgs mainFn = (FnNoArgs) man->run();
	intmax_t valueMain = mainFn();
	ASSERT_EQ(0, valueMain);
	}

	TEST(Containers, ArrayArg1){
	FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	assert(code != nullptr);

	std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	man->transcend->addRawScript("select(function(\"fn-ArrayArg1\")).");
	man->options.requireEntryFn = false;
	man->run();
	FnNoArgs fnTested = (FnNoArgs) man->getExteriorFn("fn-ArrayArg1");
	ASSERT_EQ(1, fnTested());
	}

	TEST(Containers, FlyArg1){
	FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	assert(code != nullptr);

	std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	man->transcend->addRawScript("select(function(\"fn-FlyArg1\")).");
	man->options.requireEntryFn = false;
	man->run();
	FnNoArgs fnTested = (FnNoArgs) man->getExteriorFn("fn-FlyArg1");
	ASSERT_EQ(8, fnTested());
	}

	TEST(Containers, Range1){
	FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	assert(code != nullptr);

	std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	man->transcend->addRawScript("select(function(\"fn-Range1\"; \"fn-Range2\")).");
	man->options.requireEntryFn = false;
	man->run();
	{
	FnNoArgs fnRange1 = (FnNoArgs) man->getExteriorFn("fn-Range1");
	ASSERT_EQ(10, fnRange1());
	}

	{
	FnNoArgs fnRange2 = (FnNoArgs) man->getExteriorFn("fn-Range2");
	ASSERT_EQ(20, fnRange2());
	}
	}

	TEST(Containers, RetRange1){
	FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	assert(code != nullptr);

	std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	man->transcend->addRawScript("select(function(\"fn-RetRange1\")).");
	man->options.requireEntryFn = false;
	man->run();
	{
	FnNoArgs fnRange1 = (FnNoArgs) man->getExteriorFn("fn-RetRange1");
	ASSERT_EQ(10, fnRange1());
	}
	}

	TEST(Containers, IntrinsicKeys1){
	FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	assert(code != nullptr);

	std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	man->transcend->addRawScript("select(function(\"fn-Keys1\")).");
	man->options.requireEntryFn = false;
	man->run();

	{
	FnNoArgs fn = (FnNoArgs) man->getExteriorFn("fn-Keys1");
	ASSERT_EQ(6, fn());
	}
	}

	+TEST(Containers, FoldLambdaBoundVars1){
	+ FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	+ assert(code != nullptr);
	+
	+ std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	+ man->transcend->addRawScript("select(function(\"fn-FoldLambdaBoundVars1\")).");
	+ man->options.requireEntryFn = false;
	+ man->run();
	+
	+ {
	+ Fn2Args fn = (Fn2Args) man->getExteriorFn("fn-FoldLambdaBoundVars1");
	+ ASSERT_EQ(91, fn(2, 5));
	+ }
	+}
	+
	+TEST(Containers, Reorder1){
	+ FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	+ assert(code != nullptr);
	+
	+ std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	+ man->transcend->addRawScript("select(function(\"fn-reorder1\")).");
	+ man->options.requireEntryFn = false;
	+ man->run();
	+
	+ {
	+ Fn1Args fn = (Fn1Args) man->getExteriorFn("fn-reorder1");
	+ ASSERT_EQ(1, fn(32));
	+ }
	+}
	+
	+TEST(Containers, LastLess1){
	+ FILE* code = fopen("scripts/containers/containers-tests.xreate", "r");
	+ assert(code != nullptr);
	+
	+ std::unique_ptr<XreateManager> man(XreateManager::prepare(code));
	+ man->transcend->addRawScript("select(function(\"fn-LastLess1\")).");
	+ man->options.requireEntryFn = false;
	+ man->run();
	+
	+ {
	+ Fn1Args fn = (Fn1Args) man->getExteriorFn("fn-LastLess1");
	+ ASSERT_EQ(3, fn(12));
	+ }
	+}
	+
	//TEST(Containers, ListAsArray2){
	// XreateManager* man = XreateManager::prepare(
	//
	//R"Code(
	// // CONTAINERS
	// import raw("scripts/dfa/ast-attachments.lp").
	// import raw("scripts/containers/containers.lp").
	//
	// main = function:: int;entry {
	// a= {1, 2, 3}:: [int].
	// b= loop map(a->el:: int):: [int]{
	// 2 * el
	// }.
	//
	// sum = loop fold(b->el:: int, 0->acc):: int {
	// acc + el
	// }.
	//
	// sum
	// }
	//)Code");
	//
	// void* mainPtr = man->run();
	// FnNoArgs main = (FnNoArgs) mainPtr;
	// ASSERT_EQ(12, main());
	//
	// delete man;
	//}
	//
	//TEST(Containers, Doc_RecField1){
	// string code_Variants1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "RecField1");
	// XreateManager::prepare(move(code_Variants1));
	//
	// ASSERT_TRUE(true);
	//}
	//
	//TEST(Containers, Doc_RecUpdate1){
	// string code_Variants1 = getDocumentationExampleById("documentation/Syntax/syntax.xml", "RecUpdate1");
	// XreateManager::prepare(move(code_Variants1));
	//
	// ASSERT_TRUE(true);
	//}
	//
	//TEST(Containers, ContanierLinkedList1){
	// FILE* input = fopen("scripts/containers/Containers_Implementation_LinkedList1.xreate","r");
	// assert(input != nullptr);
	//
	// Scanner scanner(input);
	// Parser parser(&scanner);
	// parser.Parse();
	//
	// AST* ast = parser.root->finalize();
	// CodeScope* body = ast->findFunction("test")->getEntryScope();
	// const Symbol symb_chilrenRaw{body->findSymbolByAlias("childrenRaw"), body};
	//
	// containers::ImplementationLinkedList iLL(symb_chilrenRaw);
	//
	// ASSERT_EQ(true, static_cast<bool>(iLL));
	// ASSERT_EQ("next", iLL.fieldPointer);
	//
	// Implementation impl = Implementation::create(symb_chilrenRaw);
	// ASSERT_NO_FATAL_FAILURE(impl.extract<ON_THE_FLY>());
	//
	// ImplementationRec<ON_THE_FLY> recOnthefly = impl.extract<ON_THE_FLY>();
	// ASSERT_EQ(symb_chilrenRaw, recOnthefly.source);
	//}
	//
	//TEST(Containers, Implementation_LinkedListFull){
	// FILE* input = fopen("scripts/containers/Containers_Implementation_LinkedList1.xreate","r");
	// assert(input != nullptr);
	//
	// std::unique_ptr<XreateManager> program(XreateManager::prepare(input));
	// void* mainPtr = program->run();
	// int (main)() = (int ()())(intptr_t)mainPtr;
	//
	// intmax_t answer = main();
	// ASSERT_EQ(17, answer);
	//
	// fclose(input);
	//}
	//
	//TEST(Containers, Doc_Intr_1){
	// string example = R"Code(
	// import raw("scripts/containers/containers.lp").
	//
	// test = function:: int; entry
	// {
	// <BODY>
	// x
	// }
	// )Code";
	// string body = getDocumentationExampleById("documentation/Concepts/containers.xml", "Intr_1");
	// replace(example, "<BODY>", body);
	//
	// XreateManager* xreate = XreateManager::prepare(move(example));
	// FnNoArgs program = (FnNoArgs) xreate->run();
	//
	// intmax_t result = program();
	// ASSERT_EQ(1, result);
	//}
	//
	//TEST(Containers, Doc_OpAccessSeq_1){
	// string example = getDocumentationExampleById("documentation/Concepts/containers.xml", "OpAccessSeq_1");
	// XreateManager* xreate = XreateManager::prepare(move(example));
	// FnNoArgs program = (FnNoArgs) xreate->run();
	//
	// intmax_t result = program();
	// ASSERT_EQ(15, result);
	//}
	//
	//TEST(Containers, Doc_OpAccessRand_1){
	// string example = getDocumentationExampleById("documentation/Concepts/containers.xml", "OpAccessRand_1");
	// XreateManager* xreate = XreateManager::prepare(move(example));
	// FnNoArgs program = (FnNoArgs) xreate->run();
	//
	// intmax_t result = program();
	// ASSERT_EQ(2, result);
	//}
	//
	//TEST(Containers, Doc_ASTAttach_1){
	// string example = getDocumentationExampleById("documentation/Concepts/containers.xml", "ASTAttach_1");
	// string outputExpected = "containers_impl(s(1,-2,0),onthefly)";
	// XreateManager* xreate = XreateManager::prepare(move(example));
	//
	// testing::internal::CaptureStdout();
	// xreate->run();
	// std::string outputActual = testing::internal::GetCapturedStdout();
	//
	// ASSERT_NE(std::string::npos, outputActual.find(outputExpected));
	//}
	//
	//TEST(Containers, IntrinsicArrInit1){
	// XreateManager* man = XreateManager::prepare(
	//
	//R"Code(
	//FnAnns = type predicate {
	// entry
	//}
	//
	//main = function(x:: int):: int; entry() {
	// a{0} = intrinsic array_init(16):: [int].
	// a{1} = a{0} + {15: 12}
	//}
	//)Code");
	-//}
	+//}
	\ No newline at end of file
	diff --git a/grammar/xreate.ATG b/grammar/xreate.ATG
	index 80c548f..4f7a123 100644
	--- a/grammar/xreate.ATG
	+++ b/grammar/xreate.ATG
	@@ -1,837 +1,838 @@
	//TODO add ListLiteral
	//TODO ExprTyped: assign default(none) type

	#include "ast.h"
	#include "ExternLayer.h"
	#include <string>
	#include <stack>
	#include <sstream>

	#define wprintf(format, ...) \
	char __buffer[100]; \
	wcstombs(__buffer, format, 100); \
	fprintf(stderr, __buffer, __VA_ARGS__)

	using namespace std;

	COMPILER Xreate

	details::inconsistent::AST* root = nullptr; // current program unit

	void SemErr(std::initializer_list<std::wstring> msgs){
	std::wstringstream output;
	for(const auto& msg: msgs){output << msg;}
	SemErr(output.str().c_str());
	}

	void ensureInitalizedAST(){
	if (root == nullptr) root = new details::inconsistent::AST();
	}

	struct {
	std::stack<CodeScope*> scopesOld;
	CodeScope* scope = nullptr;
	} context;

	void pushContextScope(CodeScope* scope){
	context.scopesOld.push(context.scope);
	context.scope = scope;
	}

	void popContextScope(){
	context.scope = context.scopesOld.top();
	context.scopesOld.pop();
	}

	int nextToken()
	{
	scanner->ResetPeek();
	return scanner->Peek()->kind;
	}

	bool checkTokenAfterIdent(int key){
	if (la->kind != _ident) return false;
	return nextToken() == key;
	}

	bool checkParametersList()
	{
	return la->kind == _ident && nextToken() == _lparen;
	}

	bool checkInfix()
	{
	return la->kind == _ident && nextToken() == _ident;
	}

	bool checkIndex()
	{
	return la->kind == _ident && nextToken() == _lbrack;
	}

	bool checkListIndex()
	{
	return la->kind == _lcurbrack && nextToken() == _lbrack;
	}

	bool checkFuncDecl()
	{
	if (la->kind != _ident) return false;

	int token2 = nextToken();
	int token3 = scanner->Peek()->kind;

	return token2 == _assign && token3 == _function;
	}

	bool checkAssignment()
	{
	if (la->kind != _ident) return false;

	scanner->ResetPeek();
	int token2 = scanner->Peek()->kind;
	if (token2 == _lcurbrack) {
	scanner->Peek();
	int token3 = scanner->Peek()->kind;
	if (token3 != _rcurbrack) return false;

	int token4 = scanner->Peek()->kind;
	return token4 == _assign;
	}

	return token2 == _assign;
	}

	void recognizeIdentifier(Expression& id, const std::wstring& hint){
	if (!context.scope)
	SemErr({L"Identifier found in undefined scope: ", hint});

	if (!context.scope->recognizeIdentifier(id)){
	root->postponeIdentifier(context.scope, id);
	}
	}

	enum SwitchKind{SWITCH_NORMAL, SWITCH_META};

	CHARACTERS
	letter = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".
	any = ANY - '"'.
	digit = "0123456789".
	cr = '\r'.
	lf = '\n'.
	tab = '\t'.

	TOKENS
	ident = (letter ['-' letter] \| '_') {letter ['-' letter] \| digit \| '_' }.
	number = digit{digit}.
	string = '"' { any } '"'.
	function = "function".
	comma = ','.
	period = '.'.
	lparen = '('.
	rparen = ')'.
	lbrack = '['.
	rbrack = ']'.
	lcurbrack = '{'.
	rcurbrack = '}'.
	equal = "==".
	assign = '='.
	implic = '-' '>'.
	colon = ':'.
	tagcolon = "::".
	lse = "<=".
	lss = "<".
	gte = ">=".
	gtr = ">".

	ne1 = "!=".
	ne2= "<>".


	COMMENTS FROM "/" TO "/" NESTED
	COMMENTS FROM "//" TO lf

	IGNORE cr + lf + tab

	PRODUCTIONS

	Xreate = (. Function* function; ensureInitalizedAST(); .)
	{( //RuleDecl
	InterfaceData \| Imprt \| GuardSection
	\| IF(checkFuncDecl()) FDecl<function> (. root->add(function); .)
	\| TDecl
	\| SkipModulesSection
	)} (. .)
	.

	Ident<std::wstring& name>=
	ident (. name = t->val; .).

	// recognition
	IdentR<Expression &e> = (. std::wstring name; .)
	Ident<name> (. e = Expression(Atom<Identifier_t>(name)); .)
	(. recognizeIdentifier(e, name); .).

	//versioning
	IdentV<Expression& e>= (. std::wstring name; .)
	Ident<name> (. e = Expression(Atom<Identifier_t>(name)); .)
	[ Version<e> ].

	//recognition + versioning
	IdentVR<Expression& e>= (. std::wstring name; .)
	Ident<name> (. e = Expression(Atom<Identifier_t>(name)); .)
	[ Version<e> ] (. recognizeIdentifier(e, name); .)
	.

	Version<Expression &e>=
	lcurbrack (
	ident (. SemErr({L"var version as ident is not implemented yet"}); .)
	\| number (. Attachments::put<versions::VariableVersion>(e, Atom<Number_t>(t->val).get()); .)
	) rcurbrack .


	FDecl<Function*& f> = (. std::wstring fname; std::wstring argName; TypeAnnotation typIn; TypeAnnotation typOut; Expression binding; .)
	Ident<fname> assign
	function (. f = new Function(fname); CodeScope* entry = f->getEntryScope(); .)

	[lparen Ident<argName> tagcolon ExprAnnotations<binding> (. f->addBinding(Atom<Identifier_t>(argName), move(binding)); .)
	{comma Ident<argName> tagcolon ExprAnnotations<binding> (. f->addBinding(Atom <Identifier_t>(argName), move(binding));.)
	} rparen]

	tagcolon Type<typOut> {';' FnTag<f> }
	BDecl<entry> (. const_cast<Expression&>(entry->getBody()).bindType(move(typOut));.)
	.

	GuardSection<>= (. std::wstring arg, guardI; Expression guardE, guardBinding; Function* f; TypeAnnotation guardT; .)
	"guard" lparen
	[Ident<arg>] tagcolon Ident<guardI> (. guardE = Expression(Operator::CALL, {Atom<Identifier_t>(guardI)}); bool res = root->recognizeVariantConstructor(guardE); .)
	(. if(!res) SemErr(coco_string_create("Can't recognize a guard"));.)
	(. if (!arg.empty()) guardE.addBindings({Atom<Identifier_t>(arg)}); .)
	(. guardBinding.type = TypeAnnotation(TypeOperator::GUARD, {guardE.type}); guardBinding.type.__valueCustom = Atom<Identifier_t>(guardI).get(); .)
	rparen lcurbrack {
	FDecl<f> (. f->guard = guardE; if (!arg.empty()){f->addBinding(Atom<Identifier_t>(arg), Expression(guardBinding));} .)
	(. root->add(f); .)
	} rcurbrack
	.


	/**
	* TYPES
	*
	*/
	TypeTerm<TypePrimitive& typ> = (. std::wstring tid; .)
	( "string" (. typ = TypePrimitive::String;.)
	\| "int" (. typ = TypePrimitive::Int;.)
	\| "float" (. typ = TypePrimitive::Float;.)
	\| "bool" (. typ = TypePrimitive::Bool; .)
	\| "i8" (. typ = TypePrimitive::I8; .)
	\| "i32" (. typ = TypePrimitive::I32; .)
	\| "i64" (. typ = TypePrimitive::I64; .)
	).

	Type<TypeAnnotation& typ> = (. TypeAnnotation typ2; TypePrimitive typ3; std::wstring tid; std::string field; .)
	(
	TList<typ>
	\| TRecord<typ>
	\| TVariant<typ>
	\| TPred<typ>
	\| TSlave<typ>
	\| TRef<typ>
	\| TypeTerm<typ3> (. typ = typ3; .)
	\| IF (checkIndex()) Ident<tid> lbrack
	TypeIndex<field> (. typ = TypeAnnotation(TypeOperator::ACCESS, {}); typ.__valueCustom = Atom<Identifier_t>(tid).get(); typ.fields.push_back(field); .)
	{comma TypeIndex<field> (. typ.fields.push_back(field); .)
	} rbrack

	\| Ident<tid> (. typ = TypeAnnotation(TypeOperator::ALIAS, {}); typ.__valueCustom = Atom<Identifier_t>(tid).get(); .)
	[lparen Type<typ2> (. typ.__operands.push_back(typ2); .)
	{comma Type<typ2> (. typ.__operands.push_back(typ2); .)
	} rparen]
	\| '*' (.typ = TypeAnnotation(); .)
	) .

	TypeIndex<std::string& name> =
	(
	number (. name = Atom<Identifier_t>(t->val).get(); .)
	\| string (. name = Atom<String_t>(t->val).get(); .)
	)
	.

	TList<TypeAnnotation& typ> = (. TypeAnnotation ty; .)
	lbrack Type<ty> rbrack (. typ = TypeAnnotation(TypeOperator::ARRAY, {ty}); .)
	.

	TRecordBody<TypeAnnotation& typ> =
	(. TypeAnnotation t; std::wstring key; size_t keyCounter=0;
	typ = TypeAnnotation(TypeOperator::RECORD, {});
	.)
	{
	(
	IF(checkTokenAfterIdent(_tagcolon)) Ident<key> tagcolon
	\| (. key = to_wstring(keyCounter++); .)
	)
	Type<t> [comma] (. typ.__operands.push_back(t); .)
	(. typ.fields.push_back(Atom<Identifier_t>(key).get()); .)
	}.

	TRecord<TypeAnnotation& typ> =
	lcurbrack TRecordBody<typ> rcurbrack
	(. if(!typ.__operands.size()) SemErr(coco_string_create("Record type can't be empty.")); .)
	.

	TVariantRec<TypeAnnotation& typ> = (. TypeAnnotation typVoid; .)
	lparen TRecordBody<typ> rparen
	(. if(typ.__operands.size()==0) typ = typVoid; .)
	.

	TVariantBody<TypeAnnotation& typ> = (. TypeAnnotation t, typVoid; std::vector<TypeAnnotation> operands; std::vector<Atom<Identifier_t>> keys; std::wstring v; .)
	lcurbrack
	{ (. t = typVoid; .)
	Ident<v> [TVariantRec<t>] (. keys.push_back(Atom<Identifier_t>(v)); operands.push_back(t); .)
	[comma]
	}
	rcurbrack
	(. typ = TypeAnnotation(TypeOperator::VARIANT, {});
	typ.__operands = operands;
	typ.addFields(std::move(keys));
	.)
	.

	TVariant<TypeAnnotation& typ>=
	"variant" TVariantBody<typ>
	(. if(!typ.__operands.size()) SemErr(coco_string_create("Variant type can't be empty.")); .)
	.

	TPred<TypeAnnotation& typ>=
	"predicate" TVariantBody<typ>
	(. if(!typ.__operands.size()) SemErr(coco_string_create("Predicate type can't be empty.")); .)
	.

	TSlave<TypeAnnotation& typ>=
	"slave" (. typ = TypeAnnotation(TypeOperator::SLAVE, {}); .)
	lparen
	string (. typ.__valueCustom = Atom<String_t>(t->val).get(); .)
	rparen
	.

	TRef<TypeAnnotation& typ>= (. TypeAnnotation typChild; .)
	"ref" lparen Type<typChild> rparen (. typ = TypeAnnotation(TypeOperator::REF, {typChild}); .)
	.

	TDecl = (. TypeAnnotation t; std::wstring tname, arg; std::vector<Atom<Identifier_t>> args; .)
	Ident<tname> assign "type"
	[lparen Ident<arg> (. args.push_back(Atom<Identifier_t>(arg)); .)
	{comma Ident<arg> (. args.push_back(Atom<Identifier_t>(arg)); .)
	} rparen]
	Type<t>[period] (. t.addBindings(move(args)); root->add(move(t), Atom<Identifier_t>(tname)); .)
	.

	ContextDecl<CodeScope * scope> = (. Expression tag; .)
	"context" tagcolon
	MetaSimpExpr<tag> (. scope->tags.push_back(tag); .)
	{';' MetaSimpExpr<tag> (. scope->tags.push_back(tag); .)
	}.

	VDecl<CodeScope* f> = (. Expression var, value;.)
	IdentV<var> assign ExprTyped<value> (. Symbol identSymbol = f->addDefinition(move(var), move(value));
	Attachments::put<ExprAlias_A>(value, identSymbol);
	.)
	.

	BDecl<CodeScope* scope> = lcurbrack (. Expression body; pushContextScope(scope); bool flagBodyFound = false; .)
	{(IF(checkAssignment()) VDecl<scope> period
	// \| RuleContextDecl<scope>
	\| ContextDecl<scope>period
	\| ExprTyped<body> (. scope->setBody(body); flagBodyFound = true; Attachments::put<ExprAlias_A>(body, Symbol{ScopedSymbol::RetSymbol, scope});.)
	)}
	rcurbrack (. if(!flagBodyFound) SemErr(coco_string_create("Code block with an empty body!"));
	popContextScope();
	.)
	.

	IfDecl<Expression& e> =
	(. Expression cond(Operator::AND, {}), condPart;
	ManagedScpPtr blockTrue = root->add(new CodeScope(context.scope));
	ManagedScpPtr blockFalse = root->add(new CodeScope(context.scope));
	e = Expression(Operator::IF, {});
	.)
	"if" lparen Expr<condPart> (. cond.operands.push_back(condPart); .)
	{ comma Expr<condPart> (. cond.operands.push_back(condPart); .)
	} rparen (. e.operands.push_back(cond); .)
	tagcolon ExprAnnotations<e>
	BDecl<&blockTrue> "else" BDecl<&blockFalse> (. e.addBlock(blockTrue); e.addBlock(blockFalse); .)
	.

	LoopDecl<Expression& e> =
	(.
	Expression eIn, eAcc, eFilters; std::wstring varEl, varAcc, contextClass; Expression tagsEl;
	ManagedScpPtr block = root->add(new CodeScope(context.scope));
	- block->trackExternalSymbs = true;
	+ block->bindExternalArgs = true;
	.)
	"loop"
	(
	"map" lparen Expr<eIn> implic Ident<varEl>
	(. e = Expression(Operator::MAP, {eIn}); .)
	tagcolon ExprAnnotations<tagsEl> rparen tagcolon ExprAnnotations<e>
	(.
	e.addBindings({Atom<Identifier_t>(varEl)});
	block->addBinding(Atom<Identifier_t>(varEl), move(tagsEl));
	.)
	BDecl<&*block>
	(. e.addBlock(block); .)

	\| "fold" lparen Expr<eIn> implic Ident<varEl> tagcolon ExprAnnotations<tagsEl>
	['\|' Expr<eFilters> ] comma Expr<eAcc> implic Ident<varAcc>rparen
	(.
	e = Expression(Operator::FOLD, {eIn, eAcc});
	e.addBindings({Atom<Identifier_t>(varEl), Atom<Identifier_t>(varAcc)});
	.)
	tagcolon ExprAnnotations<e>
	(.
	Expression varAccBindingE; varAccBindingE.type = e.type;
	block->addBinding(Atom<Identifier_t>(varEl), move(tagsEl));
	block->addBinding(Atom<Identifier_t>(varAcc), move(varAccBindingE));
	.)
	BDecl<&*block>
	(. e.addBlock(block); .)
	\| lparen Expr<eAcc> implic Ident<varAcc> rparen
	(.
	e = Expression(Operator::FOLD_INF, {eAcc});
	e.addBindings({Atom<Identifier_t>(varAcc)});
	.)
	tagcolon ExprAnnotations<e>
	(.
	Expression varAccBindingE; varAccBindingE.type = e.type;
	block->addBinding(Atom<Identifier_t>(varAcc), move(varAccBindingE));
	.)
	BDecl<&*block>
	(. e.addBlock(block); .)
	).

	// Switches
	SwitchDecl<Expression& eSwitch, SwitchKind flagSwitchKind> = (. TypeAnnotation typ; eSwitch = Expression(Operator::SWITCH, {}); Expression eCondition; Expression tag;.)
	"switch"
	(
	SwitchVariantDecl<eSwitch>
	\| SwitchLateDecl<eSwitch>
	\| lparen ExprTyped<eCondition> rparen tagcolon ExprAnnotations<eSwitch> (. eSwitch.operands.push_back(eCondition);.)
	CaseDecl<eSwitch, flagSwitchKind> {CaseDecl<eSwitch, flagSwitchKind>}
	)
	.

	CaseDecl<Expression& outer, SwitchKind flagSwitchKind> = (. ManagedScpPtr scope = root->add(new CodeScope(context.scope)); Expression condition; .)
	"case"
	( IF(flagSwitchKind == SWITCH_META)
	lparen MetaSimpExpr<condition> rparen BDecl<&*scope> (. Expression exprCase(Operator::CASE, {}); exprCase.addTags({condition}); exprCase.addBlock(scope); outer.addArg(move(exprCase));.)

	\| "default" BDecl<&*scope> (. Expression exprCase(Operator::CASE_DEFAULT, {});
	exprCase.addBlock(scope);
	outer.operands.insert(++outer.operands.begin(), exprCase); .)

	\| lparen CaseParams<&scope> rparen (. ManagedScpPtr scopeBody = root->add(new CodeScope(&scope)); Expression exprCase(Operator::CASE, {}); .)
	BDecl<&*scopeBody> (. exprCase.addBlock(scope); exprCase.addBlock(scopeBody); outer.addArg(move(exprCase)); .)
	).

	CaseParams<CodeScope* scope> = (. Expression condition; Expression guard(Operator::LOGIC_AND, {}); pushContextScope(scope); .)
	ExprTyped<condition> (. guard.addArg(Expression(condition)); .)
	{comma ExprTyped<condition> (. guard.addArg(Expression(condition)); .)
	} (. scope->setBody(guard); popContextScope(); .)
	.

	SwitchLateDecl<Expression& expr> =
	(.
	std::wstring aliasCondition; Expression exprCondition, aliasAnns;
	expr = Expression(Operator::SWITCH_LATE, {});
	ManagedScpPtr scope = root->add(new CodeScope(context.scope));
	.)

	"late" lparen Expr<exprCondition> [implic Ident<aliasCondition>] [tagcolon ExprAnnotations<aliasAnns>] rparen
	tagcolon ExprAnnotations<expr> BDecl<&*scope>
	(.
	expr.addArg(Expression(exprCondition));
	expr.addBlock(scope);
	std::string alias;
	if(aliasCondition.empty()){
	if(exprCondition.__state != Expression::IDENT){
	SemErr(coco_string_create("An identifier expected in the short form"));
	return;
	}

	//Use exprCondition as identifier
	alias = exprCondition.getValueString();
	} else {
	//Use aliasCondition
	alias = Atom<Identifier_t>(move(aliasCondition)).get();
	}

	expr.addBindings({Atom<Identifier_t>(string(alias))});
	scope->addBinding(Atom<Identifier_t>(move(alias)), move(aliasAnns));
	.)
	.

	SwitchVariantDecl<Expression& expr> =
	(. Expression varTested; std::wstring varAlias; bool flagAliasFound = false; expr = Expression(Operator::SWITCH_VARIANT, {}); .)

	"variant" lparen Expr<varTested> [implic Ident<varAlias>
	(. flagAliasFound = true; .)

	] [tagcolon ExprAnnotations<varTested>] rparen tagcolon ExprAnnotations<expr>
	(. expr.addArg(std::move(varTested));
	if (flagAliasFound) {
	expr.addBindings({Atom<Identifier_t>(varAlias)});

	} else {
	if(varTested.__state == Expression::IDENT){
	expr.addBindings({Atom<Identifier_t>(string(varTested.getValueString()))});
	}
	}
	.)

	CaseVariantDecl<expr> {CaseVariantDecl<expr>}
	.

	CaseVariantDecl<Expression& expr> = (. ManagedScpPtr scope = root->add(new CodeScope(context.scope)); std::wstring key; scope->addBinding(Atom<Identifier_t>(string(expr.bindings.front())), Expression()); .)
	"case" lparen Ident<key> rparen (. expr.addArg(root->recognizeVariantConstructor(Atom<Identifier_t>(std::move(key)))); .)
	BDecl<&*scope> (. expr.addBlock(scope); .)
	.

	IntrinsicDecl<Expression& outer>= (. std::wstring name; .)
	"intrinsic"
	(
	Ident< name>
	(. outer = Expression(Operator::CALL_INTRINSIC, {});
	outer.setValue(Atom<Identifier_t>(name));
	root->recognizeIntrinsic(outer);
	.)
	lparen [CalleeParams<outer>] rparen

	\| "query" (. outer = Expression(Operator::QUERY, {}); .)
	(
	"late" IntrinsicQueryLateDecl<outer>
	\| lparen [CalleeParams<outer>] rparen
	)
	).

	IntrinsicQueryLateDecl<Expression& expr> =
	(.
	std::wstring predicateAlias; Expression predicateE, predicateAnns;
	expr = Expression(Operator::QUERY_LATE, {});
	ManagedScpPtr scope = root->add(new CodeScope(context.scope));
	.)

	lparen Expr<predicateE> implic Ident<predicateAlias> tagcolon ExprAnnotations<predicateAnns> rparen
	tagcolon ExprAnnotations<expr> BDecl<&*scope>
	(.
	expr.addArg(move(predicateE));
	expr.addBindings({Atom<Identifier_t>(wstring(predicateAlias))});
	scope->addBinding(Atom<Identifier_t>(move(predicateAlias)), move(predicateAnns));
	expr.addBlock(scope);
	.)
	.

	SequenceDecl<Expression& sequence> = (. sequence = Expression(); sequence.setOp(Operator::SEQUENCE); ManagedScpPtr scope = root->add(new CodeScope(context.scope)); .)
	"seq" BDecl<&scope> (. sequence.blocks.push_back(&scope); scope = root->add(new CodeScope(&*scope)); .)
	{ (. scope = root->add(new CodeScope(&*scope)); .)
	BDecl<&scope> (. sequence.blocks.push_back(&scope); .)
	}.

	/============================ INTERFACES ===============================/
	Imprt<> =
	"import" "raw" lparen string (. root->__rawImports.push_back(Atom<String_t>(t->val).get()); .)
	rparen period.

	InterfaceData<> = "interface" lparen
	( "dfa" rparen InterfaceDFA
	// \| "extern-c" rparen InterfaceExternC
	\| "cfa" rparen InterfaceCFA
	).

	// InterfaceExternC<> = (. ExternData data; .)
	// lcurbrack {ExternHeadersDecl<data> \| ExternAliasDecl<data> } rcurbrack
	// (. root->addExternData(move(data)); .)
	// .
	//
	// ExternPkgDecl<std::wstring& package> =
	// "pkgconfig" lparen
	// string (. package = t->val.)
	// rparen
	// .
	//
	// ExternAliasDecl<ExternData& data> = (. std::wstring alias, package; .)
	// Ident<alias> assign "library" lparen ExternPkgDecl<package> rparen period
	// (. data.addLibAlias(Atom<Identifier_t>(alias), Atom<String_t>(package)); .)
	// .
	//
	// ExternHeadersDecl<ExternData& data> = (. std::list<std::string> listInc; std::wstring& package; .)
	// "include"
	// [lparen
	// (
	// Ident<alias> (. data.requireLibAlias(Atom<Identifier_t>(alias)); .)
	// \| ExternPkgDecl<package> (. data.requireLibPackage(Atom<String_t>(package)); .)
	// )
	// rparen]
	// lcurbrack { string (. listInc.push_back(Atom<String_t>(t->val).get()); .)
	// [comma] } rcurbrack [period] (. data.requireHeaders(listInc); .)
	// .

	InterfaceDFA<> = lcurbrack { InstructDecl } rcurbrack .

	InstructDecl = (.Operator op; Expression tag;
	Expression scheme;
	std::vector<Expression>& tags = scheme.operands;
	tags.push_back(Expression()); /* return value */ .)
	"operator" InstructAlias<op> tagcolon lparen (.scheme.setOp(op); .)
	[
	MetaSimpExpr<tag> (. tags.push_back(tag); .)
	{
	comma MetaSimpExpr<tag> (. tags.push_back(tag); .)
	}
	] rparen [ implic MetaSimpExpr<tag> (. tags[0] = tag; .)
	] (. root->addDFAData(move(scheme)); .)
	period.

	InstructAlias<Operator& op> =
	(
	"map" (. op = Operator::MAP; .)
	\| "list_range" (. op = Operator::LIST_RANGE; .)
	\| "list" (. op = Operator::LIST; .)
	\| "fold" (. op = Operator::FOLD; .)
	\| "index" (. op = Operator::INDEX; .)
	).


	InterfaceCFA<> = lcurbrack { InstructCFADecl } rcurbrack .

	InstructCFADecl<> = (.Operator op; Expression tag;
	Expression scheme;
	std::vector<Expression>& tags = scheme.operands; .)

	"operator" InstructAlias<op> tagcolon (. scheme.setOp(op); .)
	[
	MetaSimpExpr<tag> (. tags.push_back(tag); .)
	{
	comma MetaSimpExpr<tag> (. tags.push_back(tag); .)
	}
	] period (. root->addInterfaceData(CFA, move(scheme)); .).

	/============================ METAPROGRAMMING ===============================/
	// TagsDecl<CodeScope* f> = (. Expression tag; TagModifier mod = TagModifier::NONE; .)
	// ':' { MetaSimpExpr<tag> (. /f.addTag(std::move(tag), mod); / .)
	// }.


	FnTag<Function* f> = (. Expression tag; TagModifier mod = TagModifier::NONE; .)
	MetaSimpExpr<tag>
	['-' TagMod<mod>] (. f->addTag(std::move(tag), mod); .).

	TagMod<TagModifier& mod> =
	( "assert" (. mod = TagModifier::ASSERT; .)
	\| "require" (. mod = TagModifier::REQUIRE; .)
	).

	// RuleDecl<> =
	// "rule" tagcolon (. RuleArguments args; RuleGuards guards; DomainAnnotation typ; std::wstring arg; .)
	// lparen Ident<arg> tagcolon Domain<typ> (. args.add(arg, typ); .)
	// {comma Ident<arg> tagcolon Domain<typ> (. args.add(arg, typ); .)
	// } rparen
	// ["case" RGuard<guards> {comma RGuard<guards>}]
	// lcurbrack RBody<args, guards> rcurbrack .

	/* - TODO use RGuard for guards-*/
	// RuleContextDecl<CodeScope* scope> = (.Expression eHead, eGuards, eBody; .)
	// "rule" "context" tagcolon MetaSimpExpr<eHead>
	// "case" lparen MetaSimpExpr<eGuards> rparen
	// lcurbrack MetaSimpExpr<eBody> rcurbrack (.scope->contextRules.push_back(Expression(Operator::CONTEXT_RULE, {eHead, eGuards, eBody})); .).

	// Domain<DomainAnnotation& dom> =
	// (
	// "function" (. dom = DomainAnnotation::FUNCTION; .)
	// \| "variable" (. dom = DomainAnnotation::VARIABLE; .)
	// ).

	// RGuard<RuleGuards& guards>= (. Expression e; .)
	// MetaExpr<e> (. guards.add(std::move(e)); .).

	// MetaExpr<Expression& e>= (.Operator op; Expression e2; .)
	// MetaExpr2<e>
	// [MetaOp<op> MetaExpr2<e2> (. e = Expression(op, {e, e2}); .)
	// ].

	// MetaExpr2<Expression& e>=
	// (
	// lparen MetaExpr<e> rparen
	// \| MetaSimpExpr<e>
	// ).

	MetaSimpExpr<Expression& e>= (. std::wstring i1, infix; Expression e2; .)
	(
	'-' MetaSimpExpr<e2> (. e = Expression(Operator::NEG, {e2}); .)
	\| IF(checkParametersList()) Ident<i1>
	(. e = Expression(Operator::CALL, {Expression(Atom<Identifier_t>(i1))});
	if (!root->recognizeVariantConstructor(e))
	SemErr({L"Undefined predicate: ", i1});
	.)
	lparen [ MetaCalleeParams<e> ] rparen
	\| IF(checkInfix()) Ident<i1> Ident<infix> MetaSimpExpr<e2>
	(. e = Expression(Operator::CALL, {Expression(Atom<Identifier_t>(infix))});
	e.addArg(Expression(Atom<Identifier_t>(i1)));
	e.addArg(std::move(e2));
	.)
	\| IdentR<e>
	\| number (. e = Expression(Atom<Number_t>(t->val)); .)
	+ \| string (. e = Expression(Atom<String_t>(t->val)); .)
	).

	MetaCalleeParams<Expression& e> = (. Expression e2; .)
	MetaSimpExpr<e2> (. e.addArg(Expression(e2)); .)
	{comma MetaSimpExpr<e2> (. e.addArg(Expression(e2)); .)
	}.

	// RBody<const RuleArguments& args, const RuleGuards& guards> =
	// (. Expression e; std::wstring msg; .)
	// "warning" MetaExpr<e> ["message" string (. msg = t->val; .)
	// ] (. root->add(new RuleWarning(RuleArguments(args), RuleGuards(guards), std::move(e), Atom<String_t>(msg))); .)
	// .

	// MetaOp< Operator& op> =
	// implic (. op = Operator::IMPL; .)
	// .

	/============================ Expressions ===============================/
	ExprAnnotations<Expression& e> = (. TypeAnnotation typ; std::list<Expression> tags; Expression tag; e.tags.clear();.)
	Type<typ> (. e.bindType(move(typ)); .)
	{';' MetaSimpExpr<tag> (. tags.push_back(tag); .)
	} (. e.addTags(tags); .)
	.

	ExprTyped<Expression&e> = Expr<e> [tagcolon ExprAnnotations<e>].

	Expr< Expression& e> (. Expression e2; .)
	= ExprLogicAnd<e>
	[ ("or" \| "OR") Expr<e2> (. e = Expression(Operator::OR, {e, e2}); .)
	]
	.

	ExprLogicAnd< Expression& e> (. Expression e2; .)
	= ExprRel<e>
	[ ("and" \| "AND") ExprLogicAnd <e2> (. e = Expression(Operator::AND, {e, e2}); .)
	]
	.

	ExprRel< Expression& e> (. Operator op; Expression e2; .)
	= ExprArithmAdd<e>
	[ RelOp<op> ExprRel<e2> (. e = Expression(op, {e, e2}); .)
	]
	.

	ExprArithmAdd< Expression& e>= (. Operator op; Expression e2; .)
	ExprArithmMul< e>
	[
	AddOp<op>ExprArithmAdd< e2> (. e = Expression(op, {e, e2});.)
	].

	ExprArithmMul< Expression& e> (. Operator op; Expression e2; .)
	= ExprUpdate<e>
	[ MulOp< op>
	ExprArithmMul< e2> (. e = Expression(op, {e, e2}); .)
	].

	ExprUpdate<Expression& e>= (. Expression e2; .)
	ExprPostfix< e>
	[
	colon
	( IF(checkListIndex()) ListIndexLiteral<e2>
	\| ListLiteral<e2>) (. e = Expression(Operator::UPDATE, {e, e2}); .)
	].


	ExprPostfix<Expression& e>
	= Term<e>
	[ (. e = Expression(Operator::INDEX, {e}); .)
	{lbrack CalleeParams<e> rbrack }
	].


	Term< Expression& e> (. std::wstring name; e = Expression(); .)
	=
	(IF (checkParametersList()) Ident< name>
	(. e = Expression(Operator::CALL, {Atom<Identifier_t>(name)}); root->recognizeVariantConstructor(e); .)
	lparen [CalleeParams<e>] rparen
	\| IdentVR<e>
	\| ListLiteral<e>
	\| ListRangeLiteral<e>
	\| LoopDecl<e>
	\| IfDecl<e>
	\| SwitchDecl<e, SWITCH_NORMAL>
	\| IntrinsicDecl<e>
	\| SequenceDecl<e>
	\| number (. e = Expression(Atom<Number_t>(t->val)); .)
	\| string (. e = Expression(Atom<String_t>(t->val)); .)
	\| "true" (. e = Expression(Atom<Number_t>(1)); e.bindType(TypePrimitive::Bool); .)
	\| "false" (. e = Expression(Atom<Number_t>(0)); e.bindType(TypePrimitive::Bool); .)
	\| "undef" (. e = Expression(Operator::UNDEF, {}); .)
	\| '-' Term<e> (. e = Expression(Operator::NEG, {e}); .)
	\| lparen ExprTyped<e> rparen
	).

	ListLiteral<Expression& e> = (. std::wstring key;
	Expression val;
	std::list<Atom<Identifier_t>> keys;
	e = Expression(Operator::LIST, {});
	.)
	lcurbrack {
	( IF(checkTokenAfterIdent(_assign)) Ident<key> assign
	\| (. key = L""; .)
	) Expr<val> (. keys.push_back(Atom<Identifier_t>(key));
	e.operands.push_back(val);
	.)
	[comma] } rcurbrack (. e.addBindings(keys.begin(), keys.end()); .)
	.

	ListIndexLiteral<Expression& e> = (. e = Expression(Operator::LIST_INDEX, {});Expression valE;.)
	lcurbrack
	{ (. Expression idxE(Operator::LIST, {});.)
	lbrack CalleeParams<idxE> rbrack
	assign Expr<valE>[comma] (. e.operands.push_back(idxE); e.operands.push_back(valE); .)
	}
	rcurbrack
	.

	ListRangeLiteral<Expression& e> = (. Expression eFrom, eTo; .)
	lbrack Expr<eFrom> ".." Expr<eTo> rbrack (. e = Expression(Operator::LIST_RANGE, {eFrom, eTo}); .)
	.


	CalleeParams<Expression& e> = (. Expression e2; .)
	ExprTyped<e2> (. e.addArg(Expression(e2)); .)
	{comma ExprTyped<e2> (. e.addArg(Expression(e2)); .)
	}.

	AddOp< Operator& op>
	= (. op = Operator::ADD; .)
	( '+'
	\| '-' (. op = Operator::SUB; .)
	).

	MulOp< Operator& op>
	= (. op = Operator::MUL; .)
	( '*'
	\| '/' (. op = Operator::DIV; .)
	\| '%' (. op = Operator::MOD; .)
	).

	RelOp< Operator& op>
	= (. op = Operator::EQU; .)
	( equal
	\| (ne1 \| ne2) (. op = Operator::NE; .)

	\| lse (. op = Operator::LSE; .)
	\| lss (. op = Operator::LSS; .)

	\| gte (. op = Operator::GTE; .)
	\| gtr (. op = Operator::GTR; .)

	).

	SkipModulesSection = "module" {ANY} (lcurbrack {ANY} rcurbrack \| '.').

	END Xreate.
	diff --git a/scripts/containers/containers-tests.assembly.lp b/scripts/containers/containers-tests.assembly.lp
	index c0c6b76..e9703af 100644
	--- a/scripts/containers/containers-tests.assembly.lp
	+++ b/scripts/containers/containers-tests.assembly.lp
	@@ -1,6 +1,8 @@
	bind_func(Fn, exterior):-
	+ function(Fn);
	select(test(Template));
	bind_func(Fn, test(Template)).

	-bind_func(FnName, exterior):-
	- select(function(FnName)).
	+bind_func(Fn, exterior):-
	+ function(Fn);
	+ select(function(Fn)).
	diff --git a/scripts/containers/containers-tests.xreate b/scripts/containers/containers-tests.xreate
	index 2a617fc..f63aac9 100644
	--- a/scripts/containers/containers-tests.xreate
	+++ b/scripts/containers/containers-tests.xreate
	@@ -1,110 +1,151 @@
	import raw ("scripts/containers/containers-tests.assembly.lp").

	Test = type predicate{
	common
	}.

	FnAnns = type predicate{
	test(kind:: Test)
	}

	min = function(x:: [int]; csize(5)):: int
	{
	loop fold((x:: [int]; csize(5))->el:: int, 1000->min):: int
	{
	if (el < min):: int { el } else { min }
	}
	}

	min2 = function(x:: [int]; fly(csize(5))):: int
	{
	loop fold((x:: [int]; fly(csize(5)))->el:: int, 1000->min):: int
	{
	if (el < min):: int { el } else { min }
	}
	}

	Rec = type {x:: int, y:: int}.

	fn-RecUpdateInLoop1 = function(base:: int):: int {
	fields = intrinsic fields("Rec"):: [string]; i12n(on()).

	result = loop fold(fields->field:: string, {undef, 0}->ctx):: {rec:: Rec, id:: int}
	{
	{ (ctx["rec"]::Rec) : {[field] = base + ctx["id"] }, ctx["id"]+1 }:: {rec:: Rec, id:: int}
	}.

	result["rec"]["y"]
	}

	fn-Keys1 = function:: int
	{
	data = {16, 3, 2, 5}:: [int]; csize(4).
	keys = intrinsic keys(data):: [int]; range().

	loop fold(keys-> key:: int, 0->sum):: int
	{ sum + key }
	}

	fn-ArrayArg1 = function:: int; test(common())
	{
	a = {3, 2, 1, 4, 5}:: [int]; csize(5).
	min(a)
	}

	fn-FlyArg1 = function:: int; test(common())
	{
	a = {3, 2, 1, 4, 5}:: [int]; csize(5).
	b = loop map(a->x:: int):: [int]; fly(csize(5))
	{
	8 * x :: int
	}.

	min2(b)
	}

	fn-Range1 = function:: int; test(common())
	{
	range = [1..5]:: [int]; range().
	- loop fold(range->x:: int, 0->sum):: int {sum + x}
	+ loop fold(range->x:: int, 0->sum):: int { sum + x }
	}

	+
	fn-Range2 = function:: int; test(common())
	{
	range1 = [1..5]:: [int]; range().
	range2 = loop map (range1->x:: int):: [int]; fly(range()) {2 * x:: int}.
	loop fold(range2->x:: int, 0->sum):: int {sum + x}
	}

	fn-GenRange1 = function:: [int]; range()
	{
	[1..5]:: [int]; range()
	}

	fn-RetRange1 = function:: int; test(common())
	{
	loop fold((fn-GenRange1()::[int]; range()) -> x:: int, 0->sum):: int
	{ sum + x }
	}

	-/*
	-reorder = function(aggrSrc:: [int], idxs::[int]):: [int]
	+fn-FoldLambdaBoundVars1 = function(scale::int, offset:: int):: int {
	+ data = [1..8]:: [int]; range().
	+ data2 = loop map(data->el:: int):: [int]; fly(range())
	+ {
	+ scale * el + offset:: int
	+ //scale * el:: int
	+ }.
	+
	+ loop fold(data2->el:: int, 0->sum):: int { el + sum }
	+}
	+
	+fn-reorder1 = function(div:: int):: int; allocapad("global")
	+{
	+ arr = {2, 4, 6, 8}:: [int]; csize(4).
	+ idx = {3, 1}:: [int]; csize(2).
	+
	+ arr2 = reorder(arr, idx):: [int]; fly(csize(2)).
	+
	+ loop fold(arr2->divisor::int, div->quotent):: int
	+ {
	+ quotent / divisor
	+ }
	+}
	+
	+reorder = function(aggrSrc:: [int];csize(4), idxs::[int];csize(2)):: [int];fly(csize(2))
	{
	- loop map(idxs->idx)::[int]
	+ loop map(idxs->idx:: int)::[int]; fly(csize(2));alloca("global")
	{
	- aggrSrc[idx])
	+ aggrSrc[idx]::int
	}
	}

	-reverse = function(aggrSrc::[int])::[int]
	+reorder2 = function(aggrSrc:: [int];csize(4), idxs::[int];fly(range())):: [int];fly(fly(range()))
	{
	- sizeDst = 5:: int.
	- idxsDst = intrinsic keys(aggrSrc):: [int].
	- idxsTnsf = loop map(idxsDst-> idx:: int):: [int]
	+ loop map(idxs->idx:: int)::[int]; fly(fly(range()))
	{
	- sizeDst - idx - 1
	+ aggrSrc[idx]::int
	}
	+}
	+
	+reverse = function(aggrSrc::[int]; csize(4))::[int];fly(fly(range()))
	+{
	+ sizeDst = 4:: int.
	+ idxsDst = intrinsic keys(aggrSrc):: [int]; range().
	+ idxsTnsf = loop map(idxsDst-> idx:: int):: [int]; fly(range()); alloca("main")
	+ {
	+ sizeDst - (idx + 1):: int
	+ }.

	- reorder(aggrSrc, idxsTnsf)
	+ reorder2(aggrSrc, idxsTnsf)
	+}
	+
	+fn-LastLess1 = function(limit:: int):: int; allocapad("main")
	+{
	+ aggr = {15, 19, 3, 9}:: [int].
	+
	+ loop fold((reverse(aggr)::[int];fly(fly(range())))->x:: int, 0->acc):: int
	+ {
	+ if (x < limit):: int { x } else { acc }
	+ }
	}
	-*/

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