63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
#include <plasp/pddl/VariableStack.h>
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#include <plasp/pddl/Context.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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// VariableStack
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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void VariableStack::push(expressions::Variables *variables)
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{
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m_variableStack.push_back(variables);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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void VariableStack::pop()
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{
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m_variableStack.pop_back();
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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expressions::VariablePointer VariableStack::parseAndFind(plasp::pddl::Context &context)
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{
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auto &tokenizer = context.tokenizer;
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tokenizer.skipWhiteSpace();
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tokenizer.expect<std::string>("?");
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const auto variableName = tokenizer.getIdentifier();
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for (auto i = m_variableStack.crbegin(); i != m_variableStack.crend(); i++)
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{
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const auto *variables = *i;
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BOOST_ASSERT(variables);
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const auto match = std::find_if(variables->crbegin(), variables->crend(),
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[&](const auto &variable)
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{
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return variable->name() == variableName;
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});
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if (match != variables->crend())
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return match->get();
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}
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throw tokenize::TokenizerException(tokenizer.location(), "variable “" + variableName + "” used but never declared");
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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}
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}
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