Remove unused StringRef argument from MatchExpr

Apart from cleaning up the code, this change also improves the
compilation time of `UsageTests/Matchers.tests.cpp` by about 2%.

src/catch2/internal/catch_assertion_handler.cpp

@@ -76,8 +76,8 @@ namespace Catch {
 
     // This is the overload that takes a string and infers the Equals matcher from it
     // The more general overload, that takes any string matcher, is in catch_capture_matchers.cpp
-    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef matcherString  ) {
+    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str ) {
-        handleExceptionMatchExpr( handler, Matchers::Equals( str ), matcherString );
+        handleExceptionMatchExpr( handler, Matchers::Equals( str ) );
     }
 
 } // namespace Catch

src/catch2/internal/catch_assertion_handler.hpp

@@ -64,7 +64,7 @@ namespace Catch {
         auto allowThrows() const -> bool;
     };
 
-    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef matcherString );
+    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str );
 
 } // namespace Catch
 

src/catch2/internal/catch_test_macro_impl.hpp

@@ -147,7 +147,7 @@
                 catchAssertionHandler.handleUnexpectedExceptionNotThrown(); \
             } \
             catch( ... ) { \
-                Catch::handleExceptionMatchExpr( catchAssertionHandler, matcher, #matcher##_catch_sr ); \
+                Catch::handleExceptionMatchExpr( catchAssertionHandler, matcher ); \
             } \
         else \
             catchAssertionHandler.handleThrowingCallSkipped(); \

src/catch2/matchers/internal/catch_matchers_impl.cpp

@@ -16,9 +16,9 @@ namespace Catch {
     // This is the general overload that takes a any string matcher
     // There is another overload, in catch_assertionhandler.h/.cpp, that only takes a string and infers
     // the Equals matcher (so the header does not mention matchers)
-    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef matcherString  ) {
+    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher ) {
         std::string exceptionMessage = Catch::translateActiveException();
-        MatchExpr<std::string, StringMatcher const&> expr( CATCH_MOVE(exceptionMessage), matcher, matcherString );
+        MatchExpr<std::string, StringMatcher const&> expr( CATCH_MOVE(exceptionMessage), matcher );
         handler.handleExpr( expr );
     }
 

src/catch2/matchers/internal/catch_matchers_impl.hpp

@@ -9,7 +9,6 @@
 #define CATCH_MATCHERS_IMPL_HPP_INCLUDED
 
 #include <catch2/internal/catch_test_macro_impl.hpp>
-#include <catch2/internal/catch_stringref.hpp>
 #include <catch2/internal/catch_move_and_forward.hpp>
 
 namespace Catch {
@@ -18,13 +17,11 @@ namespace Catch {
     class MatchExpr : public ITransientExpression {
         ArgT && m_arg;
         MatcherT const& m_matcher;
-        StringRef m_matcherString;
     public:
-        MatchExpr( ArgT && arg, MatcherT const& matcher, StringRef matcherString )
+        MatchExpr( ArgT && arg, MatcherT const& matcher )
         :   ITransientExpression{ true, matcher.match( arg ) }, // not forwarding arg here on purpose
             m_arg( CATCH_FORWARD(arg) ),
-            m_matcher( matcher ),
+            m_matcher( matcher )
-            m_matcherString( matcherString )
         {}
 
         void streamReconstructedExpression( std::ostream& os ) const override {
@@ -41,11 +38,11 @@ namespace Catch {
 
     using StringMatcher = Matchers::MatcherBase<std::string>;
 
-    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef matcherString  );
+    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher );
 
     template<typename ArgT, typename MatcherT>
-    auto makeMatchExpr( ArgT && arg, MatcherT const& matcher, StringRef matcherString  ) -> MatchExpr<ArgT, MatcherT> {
+    auto makeMatchExpr( ArgT && arg, MatcherT const& matcher ) -> MatchExpr<ArgT, MatcherT> {
-        return MatchExpr<ArgT, MatcherT>( CATCH_FORWARD(arg), matcher, matcherString );
+        return MatchExpr<ArgT, MatcherT>( CATCH_FORWARD(arg), matcher );
     }
 
 } // namespace Catch
@@ -56,7 +53,7 @@ namespace Catch {
     do { \
         Catch::AssertionHandler catchAssertionHandler( macroName##_catch_sr, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(arg) ", " CATCH_INTERNAL_STRINGIFY(matcher), resultDisposition ); \
         INTERNAL_CATCH_TRY { \
-            catchAssertionHandler.handleExpr( Catch::makeMatchExpr( arg, matcher, #matcher##_catch_sr ) ); \
+            catchAssertionHandler.handleExpr( Catch::makeMatchExpr( arg, matcher ) ); \
         } INTERNAL_CATCH_CATCH( catchAssertionHandler ) \
         INTERNAL_CATCH_REACT( catchAssertionHandler ) \
     } while( false )
@@ -72,7 +69,7 @@ namespace Catch {
                 catchAssertionHandler.handleUnexpectedExceptionNotThrown(); \
             } \
             catch( exceptionType const& ex ) { \
-                catchAssertionHandler.handleExpr( Catch::makeMatchExpr( ex, matcher, #matcher##_catch_sr ) ); \
+                catchAssertionHandler.handleExpr( Catch::makeMatchExpr( ex, matcher ) ); \
             } \
             catch( ... ) { \
                 catchAssertionHandler.handleUnexpectedInflightException(); \