Added support for Objective-C exceptions

single_include/catch.hpp

@@ -3157,6 +3157,10 @@ namespace Catch {
 
 // #included from: catch_exception_translator_registry.hpp
 
+#ifdef __OBJC__
+#import "Foundation/Foundation.h"
+#endif
+
 namespace Catch {
 
     class ExceptionTranslatorRegistry : public IExceptionTranslatorRegistry {
@@ -3171,7 +3175,17 @@ namespace Catch {
 
         virtual std::string translateActiveException() const {
             try {
+#ifdef __OBJC__
+                // In Objective-C try objective-c exceptions first
+                @try {
+                    throw;
+                }
+                @catch (NSException *exception) {
+                    return toString( [exception description] );
+                }
+#else
                 throw;
+#endif
             }
             catch( std::exception& ex ) {
                 return ex.what();