//          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 SNOWHOUSE_NOTEXPRESSION_H
#define SNOWHOUSE_NOTEXPRESSION_H

#include "../../stringize.h"
#include "expression_fwd.h"

namespace snowhouse
{
    template <typename ExpressionType>
    struct NotExpression : Expression<NotExpression<ExpressionType>>
    {
        explicit NotExpression(const ExpressionType& expression):
            m_expression(expression)
        {
        }

        template <typename ActualType>
        bool operator()(const ActualType& actual) const
        {
            return !m_expression(actual);
        }

        ExpressionType m_expression;
    };

    template <typename ExpressionType>
    struct Stringizer<NotExpression<ExpressionType>>
    {
        static std::string ToString(
            const NotExpression<ExpressionType>& expression)
        {
            std::ostringstream builder;
            builder << "not " << snowhouse::Stringize(expression.m_expression);

            return builder.str();
        }
    };
}

#endif
