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/*
* Created by Phil on 11/5/2012.
* Copyright 2012 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_EXPRESSION_LHS_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_EXPRESSION_LHS_HPP_INCLUDED
#include "catch_expressionresult_builder.h"
#include "catch_evaluate.hpp"
#include "catch_tostring.hpp"
namespace Catch {
// Wraps the LHS of an expression and captures the operator and RHS (if any) - wrapping them all
// in an ExpressionResultBuilder object
template<typename T>
class ExpressionLhs {
void operator = ( ExpressionLhs const& );
public:
ExpressionLhs( T lhs ) : m_lhs( lhs ) {}
template<typename RhsT>
ExpressionResultBuilder& operator == ( RhsT const& rhs ) {
return captureExpression<Internal::IsEqualTo>( rhs );
}
template<typename RhsT>
ExpressionResultBuilder& operator != ( RhsT const& rhs ) {
return captureExpression<Internal::IsNotEqualTo>( rhs );
}
template<typename RhsT>
ExpressionResultBuilder& operator < ( RhsT const& rhs ) {
return captureExpression<Internal::IsLessThan>( rhs );
}
template<typename RhsT>
ExpressionResultBuilder& operator > ( RhsT const& rhs ) {
return captureExpression<Internal::IsGreaterThan>( rhs );
}
template<typename RhsT>
ExpressionResultBuilder& operator <= ( RhsT const& rhs ) {
return captureExpression<Internal::IsLessThanOrEqualTo>( rhs );
}
template<typename RhsT>
ExpressionResultBuilder& operator >= ( RhsT const& rhs ) {
return captureExpression<Internal::IsGreaterThanOrEqualTo>( rhs );
}
ExpressionResultBuilder& operator == ( bool rhs ) {
return captureExpression<Internal::IsEqualTo>( rhs );
}
ExpressionResultBuilder& operator != ( bool rhs ) {
return captureExpression<Internal::IsNotEqualTo>( rhs );
}
ExpressionResultBuilder& endExpression( ResultDisposition::Flags resultDisposition ) {
bool value = m_lhs ? true : false;
return m_result
.setLhs( Catch::toString( value ) )
.setResultType( value )
.endExpression( resultDisposition );
}
// Only simple binary expressions are allowed on the LHS.
// If more complex compositions are required then place the sub expression in parentheses
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& );
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& );
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& );
private:
template<Internal::Operator Op, typename RhsT>
ExpressionResultBuilder& captureExpression( RhsT const& rhs ) {
return m_result
.setResultType( Internal::compare<Op>( m_lhs, rhs ) )
.setLhs( Catch::toString( m_lhs ) )
.setRhs( Catch::toString( rhs ) )
.setOp( Internal::OperatorTraits<Op>::getName() );
}
private:
ExpressionResultBuilder m_result;
T m_lhs;
};
} // end namespace Catch
#endif // TWOBLUECUBES_CATCH_EXPRESSION_LHS_HPP_INCLUDED
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