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F3995300
latereasoning.h
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Tue, Jul 7, 2:05 AM
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latereasoning.h
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/*
* 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>
* Created on June 2, 2018, 1:08 PM
*/
/**
* \file src/aux/latereasoning.h
* \brief Late reasoning support
*/
#ifndef LATEREASONING_H
#define LATEREASONING_H
#include "transcendlayer.h"
namespace xreate{ namespace latereasoning{
/** \brief Represents Late Annotation, i.e. an annotation with late or runtime defined parameters*/
struct LateAnnotation{
LateAnnotation(){}
LateAnnotation(const Gringo::Symbol& symbolStatic);
std::list<std::pair<std::list<Gringo::Symbol>, Gringo::Symbol>> guardedContent;
std::list<SymbolPacked> guardKeys;
boost::optional<Gringo::Symbol> select(const std::list<Expression>& keys, AST* root, TranscendLayer* transcend) const;
};
/** \brief Represents a group of all late annotations attached to a specific target */
struct LateAnnotationsGroup{
std::unordered_map<Gringo::Symbol, LateAnnotation> annotations;
};
typedef std::map<Gringo::Symbol, LateAnnotation> LateModel;
/**
* \brief Decorates \ref TranscendLayer to support late annotations processing
* \extends TranscendLayer
*/
template<class Parent>
class LateReasoningTranscendDecorator: public Parent{
public:
const LateAnnotationsGroup& queryLate(const std::string& alias) const{
static LateAnnotationsGroup groupInvalid;
if(!__modelLate.count(alias)) return groupInvalid;
return __modelLate.at(alias);
}
protected:
virtual bool processSolution(Gringo::Model const &model) override{
const std::string& atomLateStatement = "late";
for(const Gringo::Symbol& atom: model.atoms(clingo_show_type_atoms)){
std::string atomName(atom.name().c_str());
if(atomName == atomLateStatement){
//late atom's format: (Target, (tuple of keys), (tuple of values), late-annotation)
auto atomLate = TranscendLayer::parse<Gringo::Symbol, std::list<SymbolPacked>, std::list<Gringo::Symbol>, Gringo::Symbol>(atom);
std::string atomAlias = std::get<3>(atomLate).name().c_str();
addLateAtom(atomAlias, std::get<0>(atomLate),
std::get<3>(atomLate), std::get<1>(atomLate),
std::get<2>(atomLate));
}
}
return Parent::processSolution(model);
}
private:
std::map<std::string, LateAnnotationsGroup> __modelLate;
void addLateAtom(const std::string& alias, const Gringo::Symbol& annId,
const Gringo::Symbol& content, const std::list<SymbolPacked>& guardKeys,
const std::list<Gringo::Symbol>& guardValues){
LateAnnotationsGroup& group = __modelLate[alias];
LateAnnotation& annotation = group.annotations[annId];
if (annotation.guardedContent.empty()){
annotation.guardKeys = guardKeys;
}
annotation.guardedContent.push_back(std::make_pair(guardValues, content));
}
};
}} // end of xreate::latereasoning
#endif /* LATEREASONING_H */
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