catch2/include/internal/catch_result_builder.h

/*
 *  Created by Phil on 28/5/2014.
 *  Copyright 2014 Two Blue Cubes Ltd. All rights reserved.
 *
 *  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 TWOBLUECUBES_CATCH_RESULT_BUILDER_H_INCLUDED
#define TWOBLUECUBES_CATCH_RESULT_BUILDER_H_INCLUDED

#include "catch_result_type.h"
#include "catch_assertionresult.h"
#include "catch_common.h"

namespace Catch {

    struct TestFailureException{};

    template<typename T> class ExpressionLhs;

    struct STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison;

    struct CopyableStream {
        CopyableStream() {}
        CopyableStream( CopyableStream const& other ) {
            oss << other.oss.str();
        }
        CopyableStream& operator=( CopyableStream const& other ) {
            oss.str("");
            oss << other.oss.str();
            return *this;
        }
        std::ostringstream oss;
    };

    class ResultBuilder {
    public:
        ResultBuilder(  char const* macroName,
                        SourceLineInfo const& lineInfo,
                        char const* capturedExpression,
                        ResultDisposition::Flags resultDisposition );

        template<typename T>
        ExpressionLhs<T const&> operator->* ( T const& operand );
        ExpressionLhs<bool> operator->* ( bool value );

        template<typename T>
        ResultBuilder& operator << ( T const& value ) {
            m_stream.oss << value;
            return *this;
        }

        template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator && ( RhsT const& );
        template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator || ( RhsT const& );

        ResultBuilder& setResultType( ResultWas::OfType result );
        ResultBuilder& setResultType( bool result );
        ResultBuilder& setLhs( std::string const& lhs );
        ResultBuilder& setRhs( std::string const& rhs );
        ResultBuilder& setOp( std::string const& op );

        void endExpression();

        std::string reconstructExpression() const;
        AssertionResult build() const;

        void useActiveException( ResultDisposition::Flags resultDisposition = ResultDisposition::Normal );
        void captureResult( ResultWas::OfType resultType );
        void captureExpression();
        void react();
        bool shouldDebugBreak() const;
        bool allowThrows() const;

    private:
        AssertionInfo m_assertionInfo;
        AssertionResultData m_data;
        struct ExprComponents {
            ExprComponents() : testFalse( false ) {}
            bool testFalse;
            std::string lhs, rhs, op;
        } m_exprComponents;
        CopyableStream m_stream;
        
        bool m_shouldDebugBreak;
        bool m_shouldThrow;
    };

} // namespace Catch

// Include after due to circular dependency:
#include "catch_expression_lhs.hpp"

namespace Catch {

    template<typename T>
    inline ExpressionLhs<T const&> ResultBuilder::operator->* ( T const& operand ) {
        return ExpressionLhs<T const&>( *this, operand );
    }

    inline ExpressionLhs<bool> ResultBuilder::operator->* ( bool value ) {
        return ExpressionLhs<bool>( *this, value );
    }

} // namespace Catch

#endif // TWOBLUECUBES_CATCH_RESULT_BUILDER_H_INCLUDED