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scopedecorators.h
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scopedecorators.h
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/*
* File: scopedecorators.h
* Author: pgess <v.melnychenko@xreate.org>
*
* Created on February 24, 2017, 11:35 AM
*/
#ifndef SCOPEDECORATORS_H
#define SCOPEDECORATORS_H
#include "ast.h"
#include "compilation/targetinterpretation.h"
#include "compilation/versions.h"
#include "compilation/transformations.h"
namespace xreate {
class CompilePass;
namespace compilation {
class AbstractCodeScopeUnit;
class FunctionUnit;
template<class Parent>
class CachedScopeDecorator: public Parent{
typedef CachedScopeDecorator<Parent> SELF;
public:
CachedScopeDecorator(CodeScope* codeScope, FunctionUnit* f, CompilePass* compilePass): Parent(codeScope, f, compilePass){}
void 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), VERSION_NONE};
__rawVars[id] = value;
}
void bindArg(llvm::Value* value, const ScopedSymbol& s) {
__rawVars[s] = value;
}
llvm::Value* compile(const std::string& hintBlockDecl="") override{
if (__rawVars.count(ScopedSymbol::RetSymbol)){
return __rawVars[ScopedSymbol::RetSymbol];
}
return Parent::compile(hintBlockDecl);
}
llvm::Value*
processSymbol(const Symbol& s, std::string hintRetVar) override{
CodeScope* scope = s.scope;
SELF* self = dynamic_cast<SELF*>(Parent::function->getScopeUnit(scope));
if (self->__rawVars.count(s.identifier)){
return self->__rawVars[s.identifier];
}
//Declaration could be overriden
Expression declaration = CodeScope::getDeclaration(s);
if (!declaration.isDefined()){
if (self->__declarationsOverriden.count(s.identifier)){
declaration = self->__declarationsOverriden[s.identifier];
} else {
assert(false); //in case of binding there should be raws provided.
}
}
return self->__rawVars[s.identifier] = Parent::processSymbol(s, hintRetVar);
}
void
overrideDeclaration(const Symbol binding, Expression&& declaration){
SELF* self = dynamic_cast<SELF*>(Parent::function->getScopeUnit(binding.scope));
self->__declarationsOverriden.emplace(binding.identifier, std::move(declaration));
}
void registerChildScope(std::shared_ptr<AbstractCodeScopeUnit> scope){
__childScopes.push_back(scope);
}
void reset(){
__rawVars.clear();
__declarationsOverriden.clear();
__childScopes.clear();
}
private:
std::unordered_map<ScopedSymbol, Expression> __declarationsOverriden;
std::unordered_map<ScopedSymbol,llvm::Value*> __rawVars;
std::list<std::shared_ptr<AbstractCodeScopeUnit>> __childScopes;
};
typedef CachedScopeDecorator<
compilation::TransformationsScopeDecorator<
interpretation::InterpretationScopeDecorator<
versions::VersionsScopeDecorator<compilation::BasicCodeScopeUnit>>>>
DefaultScopeUnit;
} //end of compilation namespace
struct CachedScopeDecoratorTag;
struct VersionsScopeDecoratorTag;
template<>
struct DecoratorsDict<CachedScopeDecoratorTag>{
typedef compilation::CachedScopeDecorator<
compilation::TransformationsScopeDecorator<
interpretation::InterpretationScopeDecorator<
versions::VersionsScopeDecorator<compilation::BasicCodeScopeUnit>>>> result;
};
template<>
struct DecoratorsDict<VersionsScopeDecoratorTag>{
typedef versions::VersionsScopeDecorator<
compilation::BasicCodeScopeUnit> result;
};
} //end of xreate
#endif /* SCOPEDECORATORS_H */
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