64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#ifndef __ANTHEM__HEAD_LITERAL_VISITOR_H
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#define __ANTHEM__HEAD_LITERAL_VISITOR_H
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#include <anthem/LiteralVisitor.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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// HeadLiteralVisitor
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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void throwErrorUnsupportedHeadLiteral(const char *statementType, const Clingo::AST::HeadLiteral &headLiteral)
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{
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const auto errorMessage = std::string("“") + statementType + "” head literals currently unsupported";
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throwErrorAtLocation(headLiteral.location, errorMessage.c_str());
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throw std::runtime_error(errorMessage);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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struct HeadLiteralVisitor
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{
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void visit(const Clingo::AST::Literal &literal, const Clingo::AST::HeadLiteral &)
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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(LiteralVisitor(), literal);
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}
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void visit(const Clingo::AST::Disjunction &, const Clingo::AST::HeadLiteral &headLiteral)
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{
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// TODO: implement
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throwErrorUnsupportedHeadLiteral("disjunction", headLiteral);
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}
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void visit(const Clingo::AST::Aggregate &, const Clingo::AST::HeadLiteral &headLiteral)
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{
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throwErrorUnsupportedHeadLiteral("aggregate", headLiteral);
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}
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void visit(const Clingo::AST::HeadAggregate &, const Clingo::AST::HeadLiteral &headLiteral)
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{
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throwErrorUnsupportedHeadLiteral("head aggregate", headLiteral);
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}
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void visit(const Clingo::AST::TheoryAtom &, const Clingo::AST::HeadLiteral &headLiteral)
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{
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throwErrorUnsupportedHeadLiteral("theory", headLiteral);
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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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