lazily stringify expressions

include/internal/catch_capture.hpp

@@ -132,13 +132,7 @@
     do { \
         Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #arg ", " #matcher, resultDisposition ); \
         try { \
-            std::string matcherAsString = (matcher).toString(); \
-            __catchResult \
-                .setLhs( Catch::toString( arg ) ) \
-                .setRhs( matcherAsString == Catch::Detail::unprintableString ? #matcher : matcherAsString ) \
-                .setOp( "matches" ) \
-                .setResultType( (matcher).match( arg ) ); \
-            __catchResult.captureExpression(); \
+            __catchResult.captureMatch( arg, matcher, #matcher ); \
         } catch( ... ) { \
             __catchResult.useActiveException( resultDisposition | Catch::ResultDisposition::ContinueOnFailure ); \
         } \