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// Copyright Joakim Karlsson & Kim Gräsman 2010-2012.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef IGLOO_OROPERATOR_H
#define IGLOO_OROPERATOR_H
namespace snowhouse {
struct OrOperator : public ConstraintOperator
{
template <typename ConstraintListType, typename ActualType>
void Evaluate(ConstraintListType& list, ResultStack& result, OperatorStack& operators, const ActualType& actual)
{
EvaluateOperatorsWithLessOrEqualPrecedence(*this, operators, result);
operators.push(this);
EvaluateConstraintList(list.m_tail, result, operators, actual);
}
void PerformOperation(ResultStack& result)
{
if(result.size() < 2)
{
throw InvalidExpressionException("The expression contains an or operator with too few operands");
}
bool right = result.top();
result.pop();
bool left = result.top();
result.pop();
result.push(left || right);
}
int Precedence() const
{
return 4;
}
};
template<>
struct Stringizer<OrOperator>
{
static std::string ToString(const OrOperator&)
{
return "or";
}
};
}
#endif
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