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Improved custom exception handling

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This commit is contained in:
Phil Nash
2011-04-20 19:09:41 +01:00
parent 9430a2c4c8
commit 5d7b054f14
4 changed files with 71 additions and 31 deletions
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34
Test/ExceptionTests.cpp
View File

@@ -79,19 +79,33 @@ private:
std::string m_msg;
};
namespace Catch
CATCH_TRANSLATE_EXCEPTION( CustomException& ex )
{
ExceptionTranslator<CustomException> translator;
template<>
std::string ExceptionTranslator<CustomException>::translate( CustomException& ex ) const
{
return ex.getMessage();
}
return ex.getMessage();
}
TEST_CASE_NORETURN( "./succeeding/exceptions/custom", "" )
CATCH_TRANSLATE_EXCEPTION( double& ex )
{
return Catch::toString( ex );
}
TEST_CASE_NORETURN( "./failing/exceptions/custom", "Unexpected custom exceptions can be translated" )
{
throw CustomException( "custom exception" );
}
TEST_CASE( "./failing/exceptions/custom/nothrow", "Custom exceptions can be translated when testing for nothrow" )
{
REQUIRE_NOTHROW( throw CustomException( "unexpected custom exception" ) );
}
TEST_CASE( "./failing/exceptions/custom/throw", "Custom exceptions can be translated when testing for throwing as something else" )
{
REQUIRE_THROWS_AS( throw CustomException( "custom exception - not std" ), std::exception );
}
TEST_CASE_NORETURN( "./failing/exceptions/custom/double", "Unexpected custom exceptions can be translated" )
{
throw double( 3.14 );
}

1
catch.hpp
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@@ -60,6 +60,7 @@
#define METHOD_AS_TEST_CASE( method, name, description ) CATCH_METHOD_AS_TEST_CASE( method, name, description )
#define REGISTER_REPORTER( name, reporterType ) INTERNAL_CATCH_REGISTER_REPORTER( name, reporterType )
#define CATCH_TRANSLATE_EXCEPTION( signature ) INTERNAL_CATCH_TRANSLATE_EXCEPTION( signature )
#define GENERATE( expr) INTERNAL_CATCH_GENERATE( expr )

4
internal/catch_capture.hpp
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@@ -735,7 +735,7 @@ inline bool isTrue
} \
catch( ... ) \
{ \
INTERNAL_CATCH_ACCEPT_EXPR( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
INTERNAL_CATCH_ACCEPT_EXPR( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ) << Catch::Hub::getExceptionTranslatorRegistry().translateActiveException() ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
}
///////////////////////////////////////////////////////////////////////////////
@@ -759,7 +759,7 @@ inline bool isTrue
INTERNAL_CATCH_THROWS( expr, exceptionType, stopOnFailure, macroName ) \
catch( ... ) \
{ \
INTERNAL_CATCH_ACCEPT_EXPR( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
INTERNAL_CATCH_ACCEPT_EXPR( ( Catch::ResultBuilder( __FILE__, __LINE__, macroName, #expr ) << Catch::Hub::getExceptionTranslatorRegistry().translateActiveException() ).setResultType( Catch::ResultWas::ThrewException ), stopOnFailure ); \
}
///////////////////////////////////////////////////////////////////////////////

63
internal/catch_interfaces_exception.h
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@@ -38,30 +38,55 @@ namespace Catch
};
template<typename T>
class ExceptionTranslator : public IExceptionTranslator
class ExceptionTranslatorRegistrar
{
template<typename T>
class ExceptionTranslator : public IExceptionTranslator
{
public:
ExceptionTranslator
(
std::string(*translateFunction)( T& )
)
: m_translateFunction( translateFunction )
{}
virtual std::string translate
()
const
{
try
{
throw;
}
catch( T& ex )
{
return m_translateFunction( ex );
}
}
protected:
std::string(*m_translateFunction)( T& );
};
public:
ExceptionTranslator()
template<typename T>
ExceptionTranslatorRegistrar
(
std::string(*translateFunction)( T& )
)
{
Catch::Hub::getExceptionTranslatorRegistry().registerTranslator( this );
Catch::Hub::getExceptionTranslatorRegistry().registerTranslator
( new ExceptionTranslator<T>( translateFunction ) );
}
virtual std::string translate() const
{
try
{
throw;
}
catch( T& ex )
{
return translate( ex );
}
}
protected:
std::string translate( T& ex ) const;
};
}
///////////////////////////////////////////////////////////////////////////////
#define INTERNAL_CATCH_TRANSLATE_EXCEPTION( signature ) \
static std::string INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionTranslator )( signature ); \
namespace{ Catch::ExceptionTranslatorRegistrar INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionRegistrar )( &INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionTranslator ) ); }\
static std::string INTERNAL_CATCH_UNIQUE_NAME( catch_internal_ExceptionTranslator )( signature )
#endif // TWOBLUECUBES_CATCH_INTERFACES_EXCEPTIONS_H_INCLUDED