118 lines
3.0 KiB
C++
118 lines
3.0 KiB
C++
#ifndef __PLASP__PDDL__EXPRESSIONS__N_ARY_H
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#define __PLASP__PDDL__EXPRESSIONS__N_ARY_H
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#include <plasp/pddl/ConsistencyException.h>
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#include <plasp/pddl/Context.h>
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#include <plasp/pddl/Expression.h>
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#include <plasp/pddl/expressions/Variable.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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namespace expressions
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// NAry
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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class NAry: public ExpressionCRTP<Derived>
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{
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public:
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template<typename ExpressionParser>
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static std::unique_ptr<Derived> parse(Context &context,
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ExpressionContext &expressionContext, ExpressionParser parseExpression);
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public:
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const std::vector<const Expression *> &arguments() const;
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private:
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void addArgument(const Expression *argument);
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void addArgument(ExpressionPointer &&argument);
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std::vector<const Expression *> m_arguments;
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Expressions m_argumentStorage;
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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template<typename ExpressionParser>
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std::unique_ptr<Derived> NAry<Derived>::parse(Context &context,
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ExpressionContext &expressionContext, ExpressionParser parseExpression)
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{
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auto &parser = context.parser;
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const auto position = parser.position();
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if (!parser.testAndSkip<std::string>("(")
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|| !parser.testIdentifierAndSkip(Derived::Identifier))
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{
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parser.seek(position);
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return nullptr;
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}
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auto expression = std::make_unique<Derived>();
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parser.skipWhiteSpace();
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// Assume that expression identifier (and, or, etc.) is already parsed
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// Parse arguments of the expression
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while (parser.currentCharacter() != ')')
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{
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expression->addArgument(parseExpression(context, expressionContext));
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parser.skipWhiteSpace();
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}
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if (expression->m_arguments.empty())
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context.logger.logWarning(parser.coordinate(), "“" + Derived::Identifier + "” expressions should not be empty");
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parser.expect<std::string>(")");
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return expression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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void NAry<Derived>::addArgument(const Expression *argument)
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{
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if (!argument)
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return;
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m_arguments.emplace_back(argument);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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void NAry<Derived>::addArgument(ExpressionPointer &&argument)
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{
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if (!argument)
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return;
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m_argumentStorage.emplace_back(std::move(argument));
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m_arguments.emplace_back(m_argumentStorage.back().get());
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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const std::vector<const Expression *> &NAry<Derived>::arguments() const
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{
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return m_arguments;
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}
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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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