97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
#include <plasp/pddl/InitialState.h>
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#include <plasp/pddl/Context.h>
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#include <plasp/pddl/Identifier.h>
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#include <plasp/pddl/IO.h>
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#include <plasp/pddl/expressions/Predicate.h>
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#include <plasp/utils/ParserException.h>
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namespace plasp
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{
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namespace pddl
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// InitialState
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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inline void warnUnsupported(Context &context, const std::string &expressionIdentifier)
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{
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context.logger.parserWarning(context.parser, "Expression type \"" + expressionIdentifier + "\" currently unsupported in this context");
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skipSection(context.parser);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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std::unique_ptr<InitialState> InitialState::parseDeclaration(Context &context, const Problem &problem)
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{
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auto &parser = context.parser;
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auto initialState = std::make_unique<InitialState>(InitialState());
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const auto parseInitialStateElement =
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[&]()
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{
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ExpressionPointer expression;
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if ((expression = expressions::Predicate::parse(context, problem)))
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return expression;
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const auto position = parser.position();
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parser.expect<std::string>("(");
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const auto expressionIdentifierPosition = parser.position();
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if (parser.probeIdentifier("at")
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|| parser.probeIdentifier("=")
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|| parser.probeIdentifier("not"))
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{
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parser.seek(expressionIdentifierPosition);
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const auto expressionIdentifier = parser.parseIdentifier(isIdentifier);
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parser.seek(position);
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warnUnsupported(context, expressionIdentifier);
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parser.seek(expressionIdentifierPosition);
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skipSection(parser);
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return ExpressionPointer();
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}
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parser.seek(expressionIdentifierPosition);
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const auto expressionIdentifier = parser.parseIdentifier(isIdentifier);
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parser.seek(position);
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throw utils::ParserException(parser, "Expression type \"" + expressionIdentifier + "\" unknown or not allowed in this context");
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};
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parser.skipWhiteSpace();
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while (parser.currentCharacter() != ')')
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{
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ExpressionPointer expression;
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if ((expression = parseInitialStateElement()))
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initialState->m_facts.emplace_back(std::move(expression));
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parser.skipWhiteSpace();
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}
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return initialState;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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const Expressions &InitialState::facts() const
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{
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return m_facts;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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}
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