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106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
/*
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* Created by Phil on 11/5/2012.
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* Copyright 2012 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef TWOBLUECUBES_CATCH_EXPRESSION_LHS_HPP_INCLUDED
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#define TWOBLUECUBES_CATCH_EXPRESSION_LHS_HPP_INCLUDED
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#include "catch_result_builder.h"
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#include "catch_evaluate.hpp"
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#include "catch_tostring.h"
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namespace Catch {
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// Wraps the LHS of an expression and captures the operator and RHS (if any) -
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// wrapping them all in a ResultBuilder object
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template<typename T>
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class ExpressionLhs {
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ExpressionLhs& operator = ( ExpressionLhs const& );
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# ifdef CATCH_CPP11_OR_GREATER
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ExpressionLhs& operator = ( ExpressionLhs && ) = delete;
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# endif
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public:
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ExpressionLhs( ResultBuilder& rb, T lhs ) : m_rb( rb ), m_lhs( lhs ) {}
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# ifdef CATCH_CPP11_OR_GREATER
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ExpressionLhs( ExpressionLhs const& ) = default;
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ExpressionLhs( ExpressionLhs && ) = default;
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# endif
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template<typename RhsT>
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ResultBuilder& operator == ( RhsT const& rhs ) {
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return captureExpression<Internal::IsEqualTo>( rhs );
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}
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template<typename RhsT>
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ResultBuilder& operator != ( RhsT const& rhs ) {
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return captureExpression<Internal::IsNotEqualTo>( rhs );
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}
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template<typename RhsT>
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ResultBuilder& operator < ( RhsT const& rhs ) {
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return captureExpression<Internal::IsLessThan>( rhs );
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}
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template<typename RhsT>
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ResultBuilder& operator > ( RhsT const& rhs ) {
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return captureExpression<Internal::IsGreaterThan>( rhs );
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}
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template<typename RhsT>
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ResultBuilder& operator <= ( RhsT const& rhs ) {
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return captureExpression<Internal::IsLessThanOrEqualTo>( rhs );
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}
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template<typename RhsT>
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ResultBuilder& operator >= ( RhsT const& rhs ) {
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return captureExpression<Internal::IsGreaterThanOrEqualTo>( rhs );
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}
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ResultBuilder& operator == ( bool rhs ) {
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return captureExpression<Internal::IsEqualTo>( rhs );
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}
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ResultBuilder& operator != ( bool rhs ) {
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return captureExpression<Internal::IsNotEqualTo>( rhs );
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}
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void endExpression() {
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bool value = m_lhs ? true : false;
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m_rb
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.setLhs( Catch::toString( value ) )
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.setResultType( value )
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.endExpression();
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}
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// Only simple binary expressions are allowed on the LHS.
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// If more complex compositions are required then place the sub expression in parentheses
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template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator + ( RhsT const& );
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template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator - ( RhsT const& );
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template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator / ( RhsT const& );
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template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator * ( RhsT const& );
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template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator && ( RhsT const& );
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template<typename RhsT> STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator || ( RhsT const& );
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private:
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template<Internal::Operator Op, typename RhsT>
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ResultBuilder& captureExpression( RhsT const& rhs ) {
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return m_rb
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.setResultType( Internal::compare<Op>( m_lhs, rhs ) )
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.setLhs( Catch::toString( m_lhs ) )
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.setRhs( Catch::toString( rhs ) )
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.setOp( Internal::OperatorTraits<Op>::getName() );
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}
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private:
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ResultBuilder& m_rb;
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T m_lhs;
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};
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} // end namespace Catch
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#endif // TWOBLUECUBES_CATCH_EXPRESSION_LHS_HPP_INCLUDED
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