First cut of custom exception support

internal/catch_exception_translator_registry.hpp

@@ -0,0 +1,63 @@
+/*
+ *  catch_exception_translator_registry.hpp
+ *  Catch
+ *
+ *  Created by Phil on 20/04/2011.
+ *  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_EXCEPTION_TRANSLATOR_HPP_INCLUDED
+#define TWOBLUECUBES_CATCH_EXCEPTION_TRANSLATOR_HPP_INCLUDED
+
+#include "catch_interfaces_exception.h"
+
+namespace Catch
+{    
+    class ExceptionTranslatorRegistry : public IExceptionTranslatorRegistry
+    {
+        ///////////////////////////////////////////////////////////////////////
+        virtual void registerTranslator
+        (   
+            IExceptionTranslator* translator 
+        )
+        {
+            m_translators.push_back( translator );
+        }
+        
+        ///////////////////////////////////////////////////////////////////////
+        virtual std::string translateActiveException
+        ()
+        const
+        {
+            return tryTranslators( m_translators.begin() );
+        }
+        
+        ///////////////////////////////////////////////////////////////////////
+        std::string tryTranslators
+        (
+            std::vector<IExceptionTranslator*>::const_iterator it
+        ) 
+        const
+        {
+            if( it == m_translators.end() )
+                return "Unknown exception";
+            
+            try
+            {
+                return (*it)->translate();
+            }
+            catch(...)
+            {
+                return tryTranslators( it+1 );
+            }
+        }
+        
+    private:
+        std::vector<IExceptionTranslator*> m_translators;
+    };
+}
+
+#endif // TWOBLUECUBES_CATCH_EXCEPTION_TRANSLATOR_HPP_INCLUDED

internal/catch_hub.h

@@ -24,6 +24,7 @@ namespace Catch
     struct IResultCapture;
     struct ITestCaseRegistry;
     struct IRunner;
+    struct IExceptionTranslatorRegistry;
     class GeneratorsForTest;
 
     class StreamBufBase : public std::streambuf
@@ -58,6 +59,9 @@ namespace Catch
         static ITestCaseRegistry& getTestCaseRegistry
             ();
         
+        static IExceptionTranslatorRegistry& getExceptionTranslatorRegistry
+            ();
+        
         static std::streambuf* createStreamBuf
             ( const std::string& streamName
             );
@@ -82,6 +86,7 @@ namespace Catch
         
         std::auto_ptr<IReporterRegistry> m_reporterRegistry;
         std::auto_ptr<ITestCaseRegistry> m_testCaseRegistry;
+        std::auto_ptr<IExceptionTranslatorRegistry> m_exceptionTranslatorRegistry;
         IRunner* m_runner;
         IResultCapture* m_resultCapture;
         std::map<std::string, GeneratorsForTest*> m_generatorsByTestName;

internal/catch_hub_impl.hpp

@@ -12,6 +12,7 @@
 #include "catch_hub.h"
 #include "catch_reporter_registry.hpp"
 #include "catch_test_case_registry_impl.hpp"
+#include "catch_exception_translator_registry.hpp"
 #include "catch_runner_impl.hpp"
 #include "catch_generators_impl.hpp"
 #include "catch_stream.hpp"
@@ -22,7 +23,8 @@ namespace Catch
     Hub::Hub
     ()
     :   m_reporterRegistry( new ReporterRegistry ),
-        m_testCaseRegistry( new TestRegistry )
+        m_testCaseRegistry( new TestRegistry ),
+        m_exceptionTranslatorRegistry( new ExceptionTranslatorRegistry )
     {
     }
 
@@ -73,6 +75,13 @@ namespace Catch
         return *me().m_testCaseRegistry.get();
     }
     
+    ///////////////////////////////////////////////////////////////////////////
+    IExceptionTranslatorRegistry& Hub::getExceptionTranslatorRegistry
+    ()
+    {
+        return *me().m_exceptionTranslatorRegistry.get();
+    }
+    
     ///////////////////////////////////////////////////////////////////////////
     std::streambuf* Hub::createStreamBuf
     (

internal/catch_interfaces_exception.h

@@ -0,0 +1,67 @@
+/*
+ *  catch_exception_interfaces.h
+ *  Catch
+ *
+ *  Created by Phil on 20/04/2011.
+ *  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_INTERFACES_EXCEPTIONS_H_INCLUDED
+#define TWOBLUECUBES_CATCH_INTERFACES_EXCEPTIONS_H_INCLUDED
+
+#include <string>
+                                              
+namespace Catch
+{    
+    typedef std::string(*exceptionTranslateFunction)();
+
+    struct IExceptionTranslator
+    {
+        virtual ~IExceptionTranslator(){}
+        virtual std::string translate() const = 0;
+    };
+    
+    struct IExceptionTranslatorRegistry
+    {
+        virtual ~IExceptionTranslatorRegistry
+        ()
+        {}
+        
+        virtual void registerTranslator
+            (   IExceptionTranslator* translator 
+            ) = 0;
+        virtual std::string translateActiveException
+            () const = 0;
+        
+    };
+
+    template<typename T>
+    class ExceptionTranslator : public IExceptionTranslator
+    {
+    public:
+        ExceptionTranslator()
+        {
+            Catch::Hub::getExceptionTranslatorRegistry().registerTranslator( this );
+        }
+        
+        virtual std::string translate() const
+        {
+            try
+            {
+                throw;
+            }
+            catch( T& ex )
+            {
+                return translate( ex );
+            }
+        }
+        
+    protected:
+        std::string translate( T& ex ) const;
+    };
+}
+
+#endif // TWOBLUECUBES_CATCH_INTERFACES_EXCEPTIONS_H_INCLUDED

internal/catch_runner_impl.hpp

@@ -577,7 +577,7 @@ namespace Catch
             }
             catch(...)
             {
-                acceptMessage( "unknown exception" );
+                acceptMessage( Catch::Hub::getExceptionTranslatorRegistry().translateActiveException() );
                 acceptResult( ResultWas::ThrewException );
             }
             m_info.clear();