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Phil Nash 2011-04-26 08:32:40 +01:00
parent 02c877f916
commit 823ea3efd4
74 changed files with 773 additions and 15587 deletions
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include/internal/catch_evaluate.hpp Normal file
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/*
* catch_evaluate.hpp
* Catch
*
* Created by Phil on 04/03/2011.
* Copyright 2011 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_EVALUATE_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_EVALUATE_HPP_INCLUDED
namespace Catch
{
namespace Internal
{
enum Operator
{
IsEqualTo,
IsNotEqualTo,
IsLessThan,
IsGreaterThan,
IsLessThanOrEqualTo,
IsGreaterThanOrEqualTo
};
template<Operator Op>
struct OperatorTraits{ static const char* getName(){ return "*error - unknown operator*"; } };
template<>
struct OperatorTraits<IsEqualTo>{ static const char* getName(){ return "=="; } };
template<>
struct OperatorTraits<IsNotEqualTo>{ static const char* getName(){ return "!="; } };
template<>
struct OperatorTraits<IsLessThan>{ static const char* getName(){ return "<"; } };
template<>
struct OperatorTraits<IsGreaterThan>{ static const char* getName(){ return ">"; } };
template<>
struct OperatorTraits<IsLessThanOrEqualTo>{ static const char* getName(){ return "<="; } };
template<>
struct OperatorTraits<IsGreaterThanOrEqualTo>{ static const char* getName(){ return ">="; } };
// So the compare overloads can be operator agnostic we convey the operator as a template
// enum, which is used to specialise an Evaluator for doing the comparison.
template<typename T1, typename T2, Operator Op>
class Evaluator{};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsEqualTo>
{
static bool evaluate( const T1& lhs, const T2& rhs)
{
return const_cast<T1&>( lhs ) == const_cast<T2&>( rhs );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsNotEqualTo>
{
static bool evaluate( const T1& lhs, const T2& rhs )
{
return const_cast<T1&>( lhs ) != const_cast<T2&>( rhs );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsLessThan>
{
static bool evaluate( const T1& lhs, const T2& rhs )
{
return const_cast<T1&>( lhs ) < const_cast<T2&>( rhs );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsGreaterThan>
{
static bool evaluate( const T1& lhs, const T2& rhs )
{
return const_cast<T1&>( lhs ) > const_cast<T2&>( rhs );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsGreaterThanOrEqualTo>
{
static bool evaluate( const T1& lhs, const T2& rhs )
{
return const_cast<T1&>( lhs ) >= const_cast<T2&>( rhs );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsLessThanOrEqualTo>
{
static bool evaluate( const T1& lhs, const T2& rhs )
{
return const_cast<T1&>( lhs ) <= const_cast<T2&>( rhs );
}
};
template<Operator Op, typename T1, typename T2>
bool applyEvaluator( const T1& lhs, const T2& rhs )
{
return Evaluator<T1, T2, Op>::evaluate( lhs, rhs );
}
// "base" overload
template<Operator Op, typename T1, typename T2>
bool compare( const T1& lhs, const T2& rhs )
{
return Evaluator<T1, T2, Op>::evaluate( lhs, rhs );
}
// unsigned X to int
template<Operator Op> bool compare( unsigned int lhs, int rhs )
{
return applyEvaluator<Op>( lhs, static_cast<unsigned int>( rhs ) );
}
template<Operator Op> bool compare( unsigned long lhs, int rhs )
{
return applyEvaluator<Op>( lhs, static_cast<unsigned int>( rhs ) );
}
template<Operator Op> bool compare( unsigned char lhs, int rhs )
{
return applyEvaluator<Op>( lhs, static_cast<unsigned int>( rhs ) );
}
// unsigned X to long
template<Operator Op> bool compare( unsigned int lhs, long rhs )
{
return applyEvaluator<Op>( lhs, static_cast<unsigned long>( rhs ) );
}
template<Operator Op> bool compare( unsigned long lhs, long rhs )
{
return applyEvaluator<Op>( lhs, static_cast<unsigned long>( rhs ) );
}
template<Operator Op> bool compare( unsigned char lhs, long rhs )
{
return applyEvaluator<Op>( lhs, static_cast<unsigned long>( rhs ) );
}
// int to unsigned X
template<Operator Op> bool compare( int lhs, unsigned int rhs )
{
return applyEvaluator<Op>( static_cast<unsigned int>( lhs ), rhs );
}
template<Operator Op> bool compare( int lhs, unsigned long rhs )
{
return applyEvaluator<Op>( static_cast<unsigned int>( lhs ), rhs );
}
template<Operator Op> bool compare( int lhs, unsigned char rhs )
{
return applyEvaluator<Op>( static_cast<unsigned int>( lhs ), rhs );
}
// long to unsigned X
template<Operator Op> bool compare( long lhs, unsigned int rhs )
{
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ) );
}
template<Operator Op> bool compare( long lhs, unsigned long rhs )
{
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ) );
}
template<Operator Op> bool compare( long lhs, unsigned char rhs )
{
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ) );
}
template<Operator Op, typename T>
bool compare( long lhs, const T* rhs )
{
return Evaluator<T*, T*, Op>::evaluate( reinterpret_cast<T*>( NULL ), rhs );
}
template<Operator Op, typename T>
bool compare( long lhs, T* rhs )
{
return Evaluator<T*, T*, Op>::evaluate( reinterpret_cast<T*>( lhs ), rhs );
}
} // end of namespace Internal
} // end of namespace Catch
#endif // TWOBLUECUBES_CATCH_EVALUATE_HPP_INCLUDED