Eliminate some work when results won't be reported.

include/internal/catch_capture.hpp

@@ -83,12 +83,12 @@
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_IF( macroName, resultDisposition, expr ) \
     INTERNAL_CATCH_TEST( macroName, resultDisposition, expr ); \
-    if( Catch::getResultCapture().getLastResult()->succeeded() )
+    if( Catch::getResultCapture().lastAssertionPassed() )
 
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_ELSE( macroName, resultDisposition, expr ) \
     INTERNAL_CATCH_TEST( macroName, resultDisposition, expr ); \
-    if( !Catch::getResultCapture().getLastResult()->succeeded() )
+    if( !Catch::getResultCapture().lastAssertionPassed() )
 
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_NO_THROW( macroName, resultDisposition, expr ) \

include/internal/catch_interfaces_capture.h

@@ -41,6 +41,10 @@ namespace Catch {
         virtual void exceptionEarlyReported() = 0;
 
         virtual void handleFatalErrorCondition( std::string const& message ) = 0;
+
+        virtual bool lastAssertionPassed() = 0;
+        virtual void assertionPassed() = 0;
+        virtual void assertionRun() = 0;
     };
 
     IResultCapture& getResultCapture();

include/internal/catch_result_builder.h

@@ -47,7 +47,7 @@ namespace Catch {
 
         template<typename T>
         ResultBuilder& operator << ( T const& value ) {
-            m_stream().oss << value;
+            stream().oss << value;
             return *this;
         }
 
@@ -81,6 +81,16 @@ namespace Catch {
         AssertionInfo m_assertionInfo;
         AssertionResultData m_data;
 
+        CopyableStream &stream()
+        {
+            if(!m_usedStream)
+            {
+                m_usedStream = true;
+                m_stream().oss.str("");
+            }
+            return m_stream();
+        }
+
         static CopyableStream &m_stream()
         {
             static CopyableStream s;
@@ -90,6 +100,7 @@ namespace Catch {
         bool m_shouldDebugBreak;
         bool m_shouldThrow;
         bool m_guardException;
+        bool m_usedStream;
     };
 
 } // namespace Catch

include/internal/catch_result_builder.hpp

@@ -26,15 +26,14 @@ namespace Catch {
     :   m_assertionInfo( macroName, lineInfo, capturedExpression, resultDisposition, secondArg ),
         m_shouldDebugBreak( false ),
         m_shouldThrow( false ),
-        m_guardException( false )
-    {
-        m_stream().oss.str("");
-    }
+        m_guardException( false ),
+        m_usedStream( false )
+    {}
 
     ResultBuilder::~ResultBuilder() {
 #if defined(CATCH_CONFIG_FAST_COMPILE)
         if ( m_guardException ) {
-            m_stream().oss << "Exception translation was disabled by CATCH_CONFIG_FAST_COMPILE";
+            stream().oss << "Exception translation was disabled by CATCH_CONFIG_FAST_COMPILE";
             captureResult( ResultWas::ThrewException );
             getCurrentContext().getResultCapture()->exceptionEarlyReported();
         }
@@ -51,13 +50,25 @@ namespace Catch {
     }
 
     void ResultBuilder::endExpression( DecomposedExpression const& expr ) {
-        AssertionResult result = build( expr );
-        handleResult( result );
+        // Flip bool results if FalseTest flag is set
+        if( isFalseTest( m_assertionInfo.resultDisposition ) ) {
+            m_data.negate( expr.isBinaryExpression() );
+        }
+
+        getResultCapture().assertionRun();
+
+        if(getCurrentContext().getConfig()->includeSuccessfulResults() || m_data.resultType != ResultWas::Ok)
+        {
+            AssertionResult result = build( expr );
+            handleResult( result );
+        }
+        else
+            getResultCapture().assertionPassed();
     }
 
     void ResultBuilder::useActiveException( ResultDisposition::Flags resultDisposition ) {
         m_assertionInfo.resultDisposition = resultDisposition;
-        m_stream().oss << Catch::translateActiveException();
+        stream().oss << Catch::translateActiveException();
         captureResult( ResultWas::ThrewException );
     }
 
@@ -140,12 +151,8 @@ namespace Catch {
         assert( m_data.resultType != ResultWas::Unknown );
         AssertionResultData data = m_data;
 
-        // Flip bool results if FalseTest flag is set
-        if( isFalseTest( m_assertionInfo.resultDisposition ) ) {
-            data.negate( expr.isBinaryExpression() );
-        }
-
-        data.message = m_stream().oss.str();
+        if(m_usedStream)
+            data.message = m_stream().oss.str();
         data.decomposedExpression = &expr; // for lazy reconstruction
         return AssertionResult( m_assertionInfo, data );
     }

include/internal/catch_run_context.hpp

@@ -154,6 +154,23 @@ namespace Catch {
             m_lastResult = result;
         }
 
+        virtual bool lastAssertionPassed()
+        {
+            return m_totals.assertions.passed == (m_prevPassed + 1);
+        }
+
+        virtual void assertionPassed()
+        {
+            m_totals.assertions.passed++;
+            m_lastAssertionInfo.capturedExpression = "{Unknown expression after the reported line}";
+            m_lastAssertionInfo.macroName = "";
+        }
+
+        virtual void assertionRun()
+        {
+            m_prevPassed = m_totals.assertions.passed;
+        }
+
         virtual bool sectionStarted (
             SectionInfo const& sectionInfo,
             Counts& assertions
@@ -364,6 +381,7 @@ namespace Catch {
         std::vector<SectionEndInfo> m_unfinishedSections;
         std::vector<ITracker*> m_activeSections;
         TrackerContext m_trackerContext;
+        size_t m_prevPassed;
         bool m_shouldReportUnexpected;
     };