Implemented translation of positive body literals.
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208
include/anthem/Body.h
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208
include/anthem/Body.h
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@ -0,0 +1,208 @@
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#ifndef __ANTHEM__BODY_H
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#define __ANTHEM__BODY_H
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#include <algorithm>
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#include <anthem/Context.h>
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#include <anthem/Utils.h>
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namespace anthem
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Body
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct TermPrintVisitor
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{
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void visit(const Clingo::Symbol &, const Clingo::AST::Term &term, Context &)
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{
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throwErrorAtLocation(term.location, "“symbol” terms currently unsupported in this context");
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}
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void visit(const Clingo::AST::Variable &, const Clingo::AST::Term &term, Context &)
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{
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throwErrorAtLocation(term.location, "“variable” terms currently unsupported in this context");
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}
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void visit(const Clingo::AST::UnaryOperation &, const Clingo::AST::Term &term, Context &)
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{
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throwErrorAtLocation(term.location, "“unary operation” terms currently unsupported in this context");
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}
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void visit(const Clingo::AST::BinaryOperation &, const Clingo::AST::Term &term, Context &)
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{
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throwErrorAtLocation(term.location, "“binary operation” terms currently unsupported in this context");
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}
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void visit(const Clingo::AST::Interval &, const Clingo::AST::Term &term, Context &)
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{
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throwErrorAtLocation(term.location, "“interval” terms currently unsupported in this context");
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}
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void visit(const Clingo::AST::Function &function, const Clingo::AST::Term &term, Context &context)
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{
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if (function.arguments.empty())
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{
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std::cout << "[f " << function.name << "]";
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return;
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}
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std::cout << "exists ";
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for (auto i = function.arguments.cbegin(); i != function.arguments.cend(); i++)
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{
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if (i != function.arguments.cbegin())
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std::cout << ", ";
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std::cout << AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID + (i - function.arguments.cbegin()));
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}
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std::cout << " (";
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for (auto i = function.arguments.cbegin(); i != function.arguments.cend(); i++)
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{
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const auto &argument = *i;
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if (i != function.arguments.cbegin())
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std::cout << " and ";
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std::cout
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<< AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID + (i - function.arguments.cbegin()))
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<< " in "
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<< argument;
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}
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std::cout << " and " << function.name << "(";
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for (auto i = function.arguments.cbegin(); i != function.arguments.cend(); i++)
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{
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if (i != function.arguments.cbegin())
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std::cout << ", ";
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std::cout << AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID + (i - function.arguments.cbegin()));
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}
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std::cout << "))";
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context.auxiliaryBodyLiteralID += function.arguments.size();
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}
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void visit(const Clingo::AST::Pool &, const Clingo::AST::Term &term, Context &)
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{
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throwErrorAtLocation(term.location, "“pool” terms currently unsupported");
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}
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct LiteralPrintVisitor
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{
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void visit(const Clingo::AST::Boolean &boolean, const Clingo::AST::Literal &, Context &)
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{
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if (boolean.value == true)
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std::cout << "#true";
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else
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std::cout << "#false";
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}
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void visit(const Clingo::AST::Term &term, const Clingo::AST::Literal &, Context &context)
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{
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term.data.accept(TermPrintVisitor(), term, context);
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}
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void visit(const Clingo::AST::Comparison &comparison, const Clingo::AST::Literal &literal, Context &context)
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{
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const char *operatorName = "";
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switch (comparison.comparison)
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{
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case Clingo::AST::ComparisonOperator::GreaterThan:
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operatorName = ">";
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break;
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case Clingo::AST::ComparisonOperator::LessThan:
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operatorName = "<";
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break;
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case Clingo::AST::ComparisonOperator::LessEqual:
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operatorName = "<=";
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break;
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case Clingo::AST::ComparisonOperator::GreaterEqual:
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operatorName = ">=";
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break;
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case Clingo::AST::ComparisonOperator::NotEqual:
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operatorName = "!=";
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break;
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case Clingo::AST::ComparisonOperator::Equal:
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operatorName = "=";
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break;
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}
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std::cout
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<< "exists " << AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID)
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<< ", " << AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID + 1)
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<< " ("
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<< AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID)
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<< " in " << comparison.left
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<< " and "
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<< AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID + 1)
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<< " in " << comparison.right
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<< " and "
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<< AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID)
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<< operatorName
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<< AuxiliaryBodyVariablePrefix << (context.auxiliaryBodyLiteralID + 1)
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<< ")";
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context.auxiliaryBodyLiteralID += 2;
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}
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void visit(const Clingo::AST::CSPLiteral &, const Clingo::AST::Literal &literal, Context &)
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{
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throwErrorAtLocation(literal.location, "CSP literals currently unsupported");
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}
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct BodyLiteralPrintVisitor
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{
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void visit(const Clingo::AST::Literal &literal, const Clingo::AST::BodyLiteral &, Context &context)
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{
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if (literal.sign != Clingo::AST::Sign::None)
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throwErrorAtLocation(literal.location, "only positive literals currently supported");
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literal.data.accept(LiteralPrintVisitor(), literal, context);
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}
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void visit(const Clingo::AST::ConditionalLiteral &, const Clingo::AST::BodyLiteral &bodyLiteral, Context &)
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{
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throwErrorAtLocation(bodyLiteral.location, "“conditional literal” body literals currently unsupported");
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}
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void visit(const Clingo::AST::Aggregate &, const Clingo::AST::BodyLiteral &bodyLiteral, Context &)
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{
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throwErrorAtLocation(bodyLiteral.location, "“aggregate” body literals currently unsupported");
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}
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void visit(const Clingo::AST::BodyAggregate &, const Clingo::AST::BodyLiteral &bodyLiteral, Context &)
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{
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throwErrorAtLocation(bodyLiteral.location, "“body aggregate” body literals currently unsupported");
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}
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void visit(const Clingo::AST::TheoryAtom &, const Clingo::AST::BodyLiteral &bodyLiteral, Context &)
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{
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throwErrorAtLocation(bodyLiteral.location, "“theory atom” body literals currently unsupported");
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}
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void visit(const Clingo::AST::Disjoint &, const Clingo::AST::BodyLiteral &bodyLiteral, Context &)
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{
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throwErrorAtLocation(bodyLiteral.location, "“disjoint” body literals currently unsupported");
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}
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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#endif
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22
include/anthem/Context.h
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22
include/anthem/Context.h
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@ -0,0 +1,22 @@
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#ifndef __ANTHEM__CONTEXT_H
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#define __ANTHEM__CONTEXT_H
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namespace anthem
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Context
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct Context
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{
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int auxiliaryBodyLiteralID = 0;
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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#endif
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@ -170,7 +170,7 @@ struct TermPrintSubstitutedVisitor
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assert(matchingTerm != terms.cend());
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std::cout << AuxiliaryVariablePrefix << (matchingTerm - terms.cbegin());
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std::cout << AuxiliaryHeadVariablePrefix << (matchingTerm - terms.cbegin());
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}
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std::cout << ")";
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@ -1,7 +1,7 @@
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#ifndef __ANTHEM__STATEMENT_VISITOR_H
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#define __ANTHEM__STATEMENT_VISITOR_H
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#include <anthem/BodyLiteralVisitor.h>
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#include <anthem/Body.h>
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#include <anthem/Head.h>
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#include <anthem/Utils.h>
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@ -37,6 +37,8 @@ struct StatementVisitor
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void visit(const Clingo::AST::Rule &rule, const Clingo::AST::Statement &)
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{
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Context context;
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// Concatenate all head terms
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std::vector<const Clingo::AST::Term *> headTerms;
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rule.head.data.accept(HeadLiteralCollectFunctionTermsVisitor(), rule.head, headTerms);
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@ -52,24 +54,26 @@ struct StatementVisitor
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std::cout << ", ";
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std::cout
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<< AuxiliaryVariablePrefix << (i - headTerms.cbegin())
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<< AuxiliaryHeadVariablePrefix << (i - headTerms.cbegin())
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<< " in " << headTerm;
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}
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std::cout << " and ";
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}
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std::cout << "[body] -> ";
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/*rule.head.data.accept(HeadLiteralVisitor(), rule.head);
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for (const auto &bodyLiteral : rule.body)
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// Print translated body literals
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for (auto i = rule.body.cbegin(); i != rule.body.cend(); i++)
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{
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const auto &bodyLiteral = *i;
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if (!headTerms.empty())
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std::cout << " and ";
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if (bodyLiteral.sign != Clingo::AST::Sign::None)
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throwErrorAtLocation(bodyLiteral.location, "only positive literals currently supported");
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bodyLiteral.data.accept(BodyLiteralVisitor(), bodyLiteral);
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}*/
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bodyLiteral.data.accept(BodyLiteralPrintVisitor(), bodyLiteral, context);
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}
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std::cout << " -> ";
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// Print consequent of the implication
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rule.head.data.accept(HeadLiteralPrintSubstitutedVisitor(), rule.head, headTerms);
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@ -27,7 +27,8 @@ inline void throwErrorAtLocation(const Clingo::Location &location, const char *e
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////////////////////////////////////////////////////////////////////////////////////////////////////
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constexpr const auto AuxiliaryVariablePrefix = "AUX";
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constexpr const auto AuxiliaryHeadVariablePrefix = "AUX_H";
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constexpr const auto AuxiliaryBodyVariablePrefix = "AUX_B";
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////////////////////////////////////////////////////////////////////////////////////////////////////
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