Page Menu
Home
Xreate
Search
Configure Global Search
Log In
Docs
Questions
Repository
Issues
Patches
Internal API
Files
F3996178
contextrule.cpp
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Wed, Jul 8, 9:11 AM
Size
1 KB
Mime Type
text/x-c++
Expires
Fri, Jul 10, 9:11 AM (1 d, 12 h)
Engine
blob
Format
Raw Data
Handle
271658
Attached To
rXR Xreate
contextrule.cpp
View Options
/* 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/.
*
* contextrule.cpp
*
* Created on: Jan 2, 2016
* Author: pgess <v.melnychenko@xreate.org>
*/
/**
* \file contextrule.h
* \brief Context rules support. See more on [context rules](/w/concepts/context#context-rules)
*/
#include "contextrule.h"
#include "transcendlayer.h"
#include "analysis/utils.h"
#include <boost/format.hpp>
using namespace xreate;
using namespace std;
ContextRule::ContextRule(const Expression& rule) {
assert(rule.op == Operator::CONTEXT_RULE);
assert(rule.operands.size() == 3);
head = rule.operands.at(0);
guards = rule.operands.at(1);
body = rule.operands.at(2);
}
std::string
ContextRule::compile(const ScopePacked& scopeId) const{
const string prolog =
" %context rule visibility implemenetation\n"
"context_rule_visibility(X, Y) :- X=Y, scope(X), scope(Y).\n"
"context_rule_visibility(X, Y) :- cfa_parent(X, scope(Y)), scope(X), scope(Y).\n";
list<string>repHead_ = xreate::analysis::compile(head);
assert(repHead_.size() == 1);
list<string>repGuards_ = xreate::analysis::compile(guards);
assert(repGuards_.size() == 1);
list<string>repBody_ = xreate::analysis::compile(body);
assert(repBody_.size() == 1);
const std::string& atomBindingScope = Config::get("transcend.bindings.scope");
boost::format formatContextVisibility("context_rule_visibility(ScopeX, %1%)");
boost::format formatScopeBind(atomBindingScope + "(ScopeX, %1%, Linkage)");
const string& repHead = str(formatScopeBind % repHead_.front());
const string& repGuards = str(formatScopeBind % repGuards_.front());
const string& repVisibility = str(formatContextVisibility % scopeId);
boost::format formatRule("%1%:- %2%, %3%, %4%.");
return prolog + str(formatRule % repHead % repGuards % repBody_.front() % repVisibility);
}
Event Timeline
Log In to Comment