catch2/internal/catch_capture.hpp

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2010-11-10 00:24:00 +01:00
/*
* catch_capture.hpp
* Catch
*
* Created by Phil on 18/10/2010.
* Copyright 2010 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_CAPTURE_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_CAPTURE_HPP_INCLUDED
#include "catch_resultinfo.hpp"
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#include "catch_result_type.h"
#include "catch_interfaces_capture.h"
#include "catch_debugger.hpp"
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#include "catch_evaluate.hpp"
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#include <sstream>
#include <cmath>
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namespace Catch
{
namespace Detail
{
// The following code, contributed by Sam Partington, allows us to choose an implementation
// of toString() depending on whether a << overload is available
struct NonStreamable
{
// allow construction from anything...
template<typename Anything>
NonStreamable(Anything)
{}
};
// a local operator<< which may be called if there isn't a better one elsewhere...
inline NonStreamable operator << ( std::ostream&, const NonStreamable& ns )
{
return ns;
}
template<typename T>
struct IsStreamable
{
static NoType Deduce( const NonStreamable& );
static YesType Deduce( std::ostream& );
enum
{
value = sizeof( Deduce( Synth<std::ostream&>() << Synth<const T&>() ) )
== sizeof( YesType )
};
};
// << is available, so use it with ostringstream to make the string
template<typename T, bool streamable>
struct StringMaker
{
///////////////////////////////////////////////////////////////////////
static std::string apply
(
const T& value
)
{
std::ostringstream oss;
oss << value;
return oss.str();
}
};
// << not available - use a default string
template<typename T>
struct StringMaker<T, false>
{
///////////////////////////////////////////////////////////////////////
static std::string apply
(
const T&
)
{
return "{?}";
}
};
}// end namespace Detail
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///////////////////////////////////////////////////////////////////////////////
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template<typename T>
std::string toString
(
const T& value
)
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{
return Detail::StringMaker<T, Detail::IsStreamable<T>::value>::apply( value );
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}
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// Shortcut overloads
///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
const std::string& value
)
{
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return "\"" + value + "\"";
}
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///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
const std::wstring& value
)
{
std::ostringstream oss;
oss << "\"";
for(size_t i = 0; i < value.size(); ++i )
oss << static_cast<char>( value[i] <= 0xff ? value[i] : '?');
oss << "\"";
return oss.str();
}
///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
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const char* const value
)
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{
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return value ? Catch::toString( std::string( value ) ) : std::string( "{null string}" );
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}
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///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
char* const value
)
{
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return Catch::toString( static_cast<const char* const>( value ) );
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}
///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
int value
)
{
std::ostringstream oss;
oss << value;
return oss.str();
}
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///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
unsigned int value
)
{
std::ostringstream oss;
if( value > 8192 )
oss << "0x" << std::hex << value;
else
oss << value;
return oss.str();
}
///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
unsigned long value
)
{
std::ostringstream oss;
if( value > 8192 )
oss << "0x" << std::hex << value;
else
oss << value;
return oss.str();
}
///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
const double value
)
{
std::ostringstream oss;
oss << value;
return oss.str();
}
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///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
bool value
)
{
return value ? "true" : "false";
}
///////////////////////////////////////////////////////////////////////////////
inline std::string toString
(
void* p
)
{
if( !p )
return INTERNAL_CATCH_STRINGIFY( NULL );
std::ostringstream oss;
oss << p;
return oss.str();
}
///////////////////////////////////////////////////////////////////////////////
template<typename T>
inline std::string toString
(
T* p
)
{
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return Catch::toString( static_cast<void*>( p ) );
}
///////////////////////////////////////////////////////////////////////////////
template<typename T>
inline std::string toString
(
const T* p
)
{
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return Catch::toString( static_cast<void*>( const_cast<T*>( p ) ) );
}
struct TestFailureException
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{
};
struct DummyExceptionType_DontUse
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{
};
struct STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison;
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class MutableResultInfo : public ResultInfo
{
public:
///////////////////////////////////////////////////////////////////////////
MutableResultInfo
()
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{}
///////////////////////////////////////////////////////////////////////////
MutableResultInfo
(
const char* expr,
bool isNot,
const char* filename,
std::size_t line,
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const char* macroName,
const char* message = ""
)
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: ResultInfo( expr, ResultWas::Unknown, isNot, filename, line, macroName, message )
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{
}
///////////////////////////////////////////////////////////////////////////
void setResultType
(
ResultWas::OfType result
)
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{
// Flip bool results if isNot is set
if( m_isNot && result == ResultWas::Ok )
m_result = ResultWas::ExpressionFailed;
else if( m_isNot && result == ResultWas::ExpressionFailed )
m_result = ResultWas::Ok;
else
m_result = result;
}
///////////////////////////////////////////////////////////////////////////
void setMessage
(
const std::string& message
)
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{
m_message = message;
}
///////////////////////////////////////////////////////////////////////////
void setFileAndLine
(
const std::string& filename,
std::size_t line
)
{
m_filename = filename;
m_line = line;
}
///////////////////////////////////////////////////////////////////////////
template<typename RhsT>
STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator ||
(
const RhsT&
);
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///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator &&
(
const RhsT&
);
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private:
friend class ResultBuilder;
template<typename T> friend class Expression;
template<typename T> friend class PtrExpression;
///////////////////////////////////////////////////////////////////////////
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MutableResultInfo& captureBoolExpression
(
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bool result
)
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{
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m_lhs = Catch::toString( result );
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m_op = m_isNot ? "!" : "";
setResultType( result ? ResultWas::Ok : ResultWas::ExpressionFailed );
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return *this;
}
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///////////////////////////////////////////////////////////////////////////
template<Internal::Operator Op, typename T1, typename T2>
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MutableResultInfo& captureExpression
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(
const T1& lhs,
const T2& rhs
)
{
setResultType( Internal::compare<Op>( lhs, rhs ) ? ResultWas::Ok : ResultWas::ExpressionFailed );
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m_lhs = Catch::toString( lhs );
m_rhs = Catch::toString( rhs );
m_op = Internal::OperatorTraits<Op>::getName();
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return *this;
}
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};
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template<typename T>
class Expression
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{
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void operator = ( const Expression& );
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public:
///////////////////////////////////////////////////////////////////////////
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Expression
(
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MutableResultInfo& result,
const T& lhs
)
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: m_result( result ),
m_lhs( lhs )
{
}
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///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
MutableResultInfo& operator ==
(
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const RhsT& rhs
)
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{
return m_result.captureExpression<Internal::IsEqualTo>( m_lhs, rhs );
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}
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///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
MutableResultInfo& operator !=
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(
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const RhsT& rhs
)
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{
return m_result.captureExpression<Internal::IsNotEqualTo>( m_lhs, rhs );
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}
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///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
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MutableResultInfo& operator <
(
const RhsT& rhs
)
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{
return m_result.captureExpression<Internal::IsLessThan>( m_lhs, rhs );
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}
///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
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MutableResultInfo& operator >
(
const RhsT& rhs
)
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{
return m_result.captureExpression<Internal::IsGreaterThan>( m_lhs, rhs );
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}
///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
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MutableResultInfo& operator <=
(
const RhsT& rhs
)
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{
return m_result.captureExpression<Internal::IsLessThanOrEqualTo>( m_lhs, rhs );
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}
///////////////////////////////////////////////////////////////////////////
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template<typename RhsT>
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MutableResultInfo& operator >=
(
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const RhsT& rhs
)
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{
return m_result.captureExpression<Internal::IsGreaterThanOrEqualTo>( m_lhs, rhs );
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}
///////////////////////////////////////////////////////////////////////////
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operator MutableResultInfo&
()
{
return m_result.captureBoolExpression( m_lhs );
}
///////////////////////////////////////////////////////////////////////////
template<typename RhsT>
STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator +
(
const RhsT&
);
///////////////////////////////////////////////////////////////////////////
template<typename RhsT>
STATIC_ASSERT_Expression_Too_Complex_Please_Rewrite_As_Binary_Comparison& operator -
(
const RhsT&
);
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private:
MutableResultInfo& m_result;
const T& m_lhs;
};
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template<typename LhsT>
class PtrExpression
{
public:
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///////////////////////////////////////////////////////////////////////////
PtrExpression
(
MutableResultInfo& result,
const LhsT* lhs
)
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: m_result( &result ),
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m_lhs( lhs )
{}
///////////////////////////////////////////////////////////////////////////
template<typename RhsT>
MutableResultInfo& operator ==
(
const RhsT* rhs
)
{
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return m_result->captureExpression<Internal::IsEqualTo>( m_lhs, rhs );
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}
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///////////////////////////////////////////////////////////////////////////
// This catches NULL
MutableResultInfo& operator ==
(
LhsT* rhs
)
{
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return m_result->captureExpression<Internal::IsEqualTo>( m_lhs, rhs );
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}
///////////////////////////////////////////////////////////////////////////
template<typename RhsT>
MutableResultInfo& operator !=
(
const RhsT* rhs
)
{
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return m_result->captureExpression<Internal::IsNotEqualTo>( m_lhs, rhs );
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}
///////////////////////////////////////////////////////////////////////////
// This catches NULL
MutableResultInfo& operator !=
(
LhsT* rhs
)
{
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return m_result->captureExpression<Internal::IsNotEqualTo>( m_lhs, rhs );
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}
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///////////////////////////////////////////////////////////////////////////
operator MutableResultInfo&
()
{
return m_result->captureBoolExpression( m_lhs );
}
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private:
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MutableResultInfo* m_result;
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const LhsT* m_lhs;
};
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class ResultBuilder
{
public:
///////////////////////////////////////////////////////////////////////////
ResultBuilder
(
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const char* filename,
std::size_t line,
const char* macroName,
const char* expr = "",
bool isNot = false
)
: m_result( expr, isNot, filename, line, macroName )
{}
///////////////////////////////////////////////////////////////////////////
template<typename T>
Expression<T> operator->*
(
const T & operand
)
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{
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Expression<T> expr( m_result, operand );
return expr;
}
///////////////////////////////////////////////////////////////////////////
template<typename T>
PtrExpression<T> operator->*
(
const T* operand
)
{
PtrExpression<T> expr( m_result, operand );
return expr;
}
///////////////////////////////////////////////////////////////////////////
template<typename T>
PtrExpression<T> operator->*
(
T* operand
)
{
PtrExpression<T> expr( m_result, operand );
return expr;
}
///////////////////////////////////////////////////////////////////////////
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template<typename T>
ResultBuilder& operator <<
(
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const T & value
)
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{
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m_messageStream << value;
return *this;
}
///////////////////////////////////////////////////////////////////////////
ResultBuilder& setResultType
(
ResultWas::OfType resultType
)
{
m_result.setResultType( resultType );
return *this;
}
///////////////////////////////////////////////////////////////////////////
operator MutableResultInfo&
()
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{
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m_result.setMessage( m_messageStream.str() );
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return m_result;
}
private:
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MutableResultInfo m_result;
std::ostringstream m_messageStream;
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};
class ScopedInfo
{
public:
///////////////////////////////////////////////////////////////////////////
ScopedInfo
()
{
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Hub::getResultCapture().pushScopedInfo( this );
}
///////////////////////////////////////////////////////////////////////////
~ScopedInfo
()
{
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Hub::getResultCapture().popScopedInfo( this );
}
///////////////////////////////////////////////////////////////////////////
ScopedInfo& operator <<
(
const char* str
)
{
m_oss << str;
return *this;
}
///////////////////////////////////////////////////////////////////////////
std::string getInfo
()
const
{
return m_oss.str();
}
private:
std::ostringstream m_oss;
};
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// !TBD Need to clean this all up
#define CATCH_absTol 1e-10
#define CATCH_relTol 1e-10
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inline double catch_max( double x, double y )
{
return x > y ? x : y;
}
namespace Detail
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{
class Approx
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{
public:
///////////////////////////////////////////////////////////////////////////
// !TBD more generic
explicit Approx
(
double d
)
: m_d( d )
{
}
///////////////////////////////////////////////////////////////////////////
template<typename T>
friend bool operator ==
(
const T& lhs,
const Approx& rhs
)
{
// !TBD Use proper tolerance
// From: http://realtimecollisiondetection.net/blog/?p=89
// see also: http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm
return fabs( lhs - rhs.m_d ) <= catch_max( CATCH_absTol, CATCH_relTol * catch_max( fabs(lhs), fabs(rhs.m_d) ) );
}
///////////////////////////////////////////////////////////////////////////
template<typename T>
friend bool operator !=
(
const T& lhs,
const Approx& rhs
)
{
return ! operator==( lhs, rhs );
}
double m_d;
};
}
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///////////////////////////////////////////////////////////////////////////////
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template<>
inline std::string toString<Detail::Approx>
(
const Detail::Approx& value
)
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{
std::ostringstream oss;
oss << "Approx( " << value.m_d << ")";
return oss.str();
}
///////////////////////////////////////////////////////////////////////////////
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// This is just here to avoid compiler warnings with macro constants
inline bool isTrue
(
bool value
)
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{
return value;
}
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} // end namespace Catch
///////////////////////////////////////////////////////////////////////////////
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#define INTERNAL_CATCH_ACCEPT_EXPR( expr, stopOnFailure ) \
if( Catch::ResultAction::Value action = Catch::Hub::getResultCapture().acceptExpression( expr ) ) \
{ \
if( action == Catch::ResultAction::DebugFailed ) BreakIntoDebugger(); \
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if( Catch::isTrue( stopOnFailure ) ) throw Catch::TestFailureException(); \
}
///////////////////////////////////////////////////////////////////////////////
#define INTERNAL_CATCH_TEST( expr, isNot, stopOnFailure, macroName ) \
INTERNAL_CATCH_ACCEPT_EXPR( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr, isNot )->*expr ), stopOnFailure ); \
if( Catch::isTrue( false ) ){ bool dummyResult = ( expr ); Catch::isTrue( dummyResult ); }
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///////////////////////////////////////////////////////////////////////////////
#define INTERNAL_CATCH_NO_THROW( expr, stopOnFailure, macroName ) \
try \
{ \
expr; \
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INTERNAL_CATCH_ACCEPT_EXPR( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ).setResultType( Catch::ResultWas::Ok ), stopOnFailure ); \
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} \
catch( std::exception& ex ) \
{ \
INTERNAL_CATCH_ACCEPT_EXPR( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ) << ex.what() ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
} \
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catch( ... ) \
{ \
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INTERNAL_CATCH_ACCEPT_EXPR( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ) << Catch::Hub::getExceptionTranslatorRegistry().translateActiveException() ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
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}
///////////////////////////////////////////////////////////////////////////////
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#define INTERNAL_CATCH_THROWS( expr, exceptionType, stopOnFailure, macroName ) \
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try \
{ \
expr; \
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INTERNAL_CATCH_ACCEPT_EXPR( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ).setResultType( Catch::ResultWas::DidntThrowException ), stopOnFailure ); \
} \
catch( Catch::TestFailureException& ) \
{ \
throw; \
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} \
catch( exceptionType ) \
{ \
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INTERNAL_CATCH_ACCEPT_EXPR( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ).setResultType( Catch::ResultWas::Ok ), stopOnFailure ); \
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}
///////////////////////////////////////////////////////////////////////////////
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#define INTERNAL_CATCH_THROWS_AS( expr, exceptionType, stopOnFailure, macroName ) \
INTERNAL_CATCH_THROWS( expr, exceptionType, stopOnFailure, macroName ) \
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catch( ... ) \
{ \
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INTERNAL_CATCH_ACCEPT_EXPR( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ) << Catch::Hub::getExceptionTranslatorRegistry().translateActiveException() ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
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}
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///////////////////////////////////////////////////////////////////////////////
#define INTERNAL_CATCH_MSG( reason, resultType, stopOnFailure, macroName ) \
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Catch::Hub::getResultCapture().acceptExpression( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName ) << reason ).setResultType( resultType ) );
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///////////////////////////////////////////////////////////////////////////////
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#define INTERNAL_CATCH_SCOPED_INFO( log ) \
Catch::ScopedInfo INTERNAL_CATCH_UNIQUE_NAME( info ); \
INTERNAL_CATCH_UNIQUE_NAME( info ) << log
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#endif // TWOBLUECUBES_CATCH_CAPTURE_HPP_INCLUDED