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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
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@ -79,19 +79,33 @@ private:
std::string m_msg; std::string m_msg;
}; };
CATCH_TRANSLATE_EXCEPTION( CustomException& ex )
namespace Catch
{ {
ExceptionTranslator<CustomException> translator; return ex.getMessage();
template<>
std::string ExceptionTranslator<CustomException>::translate( CustomException& ex ) const
{
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" ); 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 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 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 ) #define GENERATE( expr) INTERNAL_CATCH_GENERATE( expr )

4
internal/catch_capture.hpp
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@ -735,7 +735,7 @@ inline bool isTrue
} \ } \
catch( ... ) \ 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 ) \ INTERNAL_CATCH_THROWS( expr, exceptionType, stopOnFailure, macroName ) \
catch( ... ) \ 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 ExceptionTranslatorRegistrar
class ExceptionTranslator : public IExceptionTranslator
{ {
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: 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 #endif // TWOBLUECUBES_CATCH_INTERFACES_EXCEPTIONS_H_INCLUDED