155 lines
4.0 KiB
C++
155 lines
4.0 KiB
C++
#ifndef __PLASP__PDDL__EXPRESSIONS__BINARY_H
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#define __PLASP__PDDL__EXPRESSIONS__BINARY_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/Exists.h>
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#include <plasp/pddl/expressions/ForAll.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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// Binary
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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class Binary: public ExpressionCRTP<Derived>
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{
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public:
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template<typename ExpressionParser>
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static boost::intrusive_ptr<Derived> parse(Context &context,
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ExpressionContext &expressionContext, ExpressionParser parseExpression);
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public:
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void setArgument(size_t i, ExpressionPointer argument);
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const std::array<ExpressionPointer, 2> &arguments() const;
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ExpressionPointer reduced() override;
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ExpressionPointer negationNormalized() override;
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ExpressionPointer prenex(Expression::Type lastExpressionType) override;
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void print(std::ostream &ostream) const override;
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protected:
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std::array<ExpressionPointer, 2> m_arguments;
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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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boost::intrusive_ptr<Derived> Binary<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 = boost::intrusive_ptr<Derived>(new Derived);
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// Parse arguments of the expression
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expression->Binary<Derived>::setArgument(0, parseExpression(context, expressionContext));
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expression->Binary<Derived>::setArgument(1, parseExpression(context, expressionContext));
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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 Binary<Derived>::setArgument(size_t i, ExpressionPointer expression)
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{
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BOOST_ASSERT_MSG(i <= m_arguments.size(), "Index out of range");
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m_arguments[i] = expression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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const std::array<ExpressionPointer, 2> &Binary<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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template<class Derived>
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inline ExpressionPointer Binary<Derived>::reduced()
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{
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for (size_t i = 0; i < m_arguments.size(); i++)
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{
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BOOST_ASSERT(m_arguments[i]);
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m_arguments[i] = m_arguments[i]->reduced();
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}
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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inline ExpressionPointer Binary<Derived>::negationNormalized()
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{
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for (size_t i = 0; i < m_arguments.size(); i++)
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{
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BOOST_ASSERT(m_arguments[i]);
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m_arguments[i] = m_arguments[i]->negationNormalized();
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}
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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inline ExpressionPointer Binary<Derived>::prenex(Expression::Type)
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{
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// TODO: implement by refactoring binary expressions
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<class Derived>
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inline void Binary<Derived>::print(std::ostream &ostream) const
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{
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ostream << "(" << Derived::Identifier;
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std::for_each(m_arguments.begin(), m_arguments.end(),
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[&](auto &argument)
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{
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ostream << " ";
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argument->print(ostream);
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});
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ostream << ")";
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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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