Constexprify NameAndTags constructor

Apart from being clearer, it also improves the overall codesize
of the implementation library, and should improve the performance
as well, by removing one level of indirection.

src/catch2/catch_message.cpp

@@ -17,13 +17,6 @@ namespace Catch {
 
     ////////////////////////////////////////////////////////////////////////////
 
-    Catch::MessageBuilder::MessageBuilder( StringRef const& macroName,
-                                           SourceLineInfo const& lineInfo,
-                                           ResultWas::OfType type )
-        :m_info(macroName, lineInfo, type) {}
-
-    ////////////////////////////////////////////////////////////////////////////
-
 
     ScopedMessage::ScopedMessage( MessageBuilder const& builder ):
         m_info( builder.m_info ) {

src/catch2/catch_message.hpp

@@ -34,9 +34,11 @@ namespace Catch {
     };
 
     struct MessageBuilder : MessageStream {
-        MessageBuilder( StringRef const& macroName,
+        MessageBuilder( StringRef macroName,
                         SourceLineInfo const& lineInfo,
-                        ResultWas::OfType type );
+                        ResultWas::OfType type ):
+            m_info(macroName, lineInfo, type) {}
+
 
         template<typename T>
         MessageBuilder& operator << ( T const& value ) {

src/catch2/interfaces/catch_interfaces_capture.hpp

@@ -63,7 +63,7 @@ namespace Catch {
         virtual void handleMessage
                 (   AssertionInfo const& info,
                     ResultWas::OfType resultType,
-                    StringRef const& message,
+                    StringRef message,
                     AssertionReaction& reaction ) = 0;
         virtual void handleUnexpectedExceptionNotThrown
                 (   AssertionInfo const& info,

src/catch2/internal/catch_assertion_handler.cpp

@@ -18,7 +18,7 @@
 namespace Catch {
 
     AssertionHandler::AssertionHandler
-        (   StringRef const& macroName,
+        (   StringRef macroName,
             SourceLineInfo const& lineInfo,
             StringRef capturedExpression,
             ResultDisposition::Flags resultDisposition )
@@ -29,7 +29,7 @@ namespace Catch {
     void AssertionHandler::handleExpr( ITransientExpression const& expr ) {
         m_resultCapture.handleExpr( m_assertionInfo, expr, m_reaction );
     }
-    void AssertionHandler::handleMessage(ResultWas::OfType resultType, StringRef const& message) {
+    void AssertionHandler::handleMessage(ResultWas::OfType resultType, StringRef message) {
         m_resultCapture.handleMessage( m_assertionInfo, resultType, message, m_reaction );
     }
 
@@ -80,7 +80,7 @@ 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 const& matcherString  ) {
+    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef matcherString  ) {
         handleExceptionMatchExpr( handler, Matchers::Equals( str ), matcherString );
     }
 

src/catch2/internal/catch_assertion_handler.hpp

@@ -32,7 +32,7 @@ namespace Catch {
 
     public:
         AssertionHandler
-            (   StringRef const& macroName,
+            (   StringRef macroName,
                 SourceLineInfo const& lineInfo,
                 StringRef capturedExpression,
                 ResultDisposition::Flags resultDisposition );
@@ -49,7 +49,7 @@ namespace Catch {
         }
         void handleExpr( ITransientExpression const& expr );
 
-        void handleMessage(ResultWas::OfType resultType, StringRef const& message);
+        void handleMessage(ResultWas::OfType resultType, StringRef message);
 
         void handleExceptionThrownAsExpected();
         void handleUnexpectedExceptionNotThrown();
@@ -64,7 +64,7 @@ namespace Catch {
         auto allowThrows() const -> bool;
     };
 
-    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef const& matcherString );
+    void handleExceptionMatchExpr( AssertionHandler& handler, std::string const& str, StringRef matcherString );
 
 } // namespace Catch
 

src/catch2/internal/catch_combined_tu.cpp

@@ -194,7 +194,7 @@ Catch::LeakDetector::~LeakDetector() {
 
 namespace Catch {
 
-    MessageInfo::MessageInfo(   StringRef const& _macroName,
+    MessageInfo::MessageInfo(   StringRef _macroName,
                                 SourceLineInfo const& _lineInfo,
                                 ResultWas::OfType _type )
     :   macroName( _macroName ),

src/catch2/internal/catch_message_info.hpp

@@ -17,7 +17,7 @@
 namespace Catch {
 
     struct MessageInfo {
-        MessageInfo(    StringRef const& _macroName,
+        MessageInfo(    StringRef _macroName,
                         SourceLineInfo const& _lineInfo,
                         ResultWas::OfType _type );
 

src/catch2/internal/catch_run_context.cpp

@@ -519,7 +519,7 @@ namespace Catch {
     void RunContext::handleMessage(
             AssertionInfo const& info,
             ResultWas::OfType resultType,
-            StringRef const& message,
+            StringRef message,
             AssertionReaction& reaction
     ) {
         m_reporter->assertionStarting( info );

src/catch2/internal/catch_run_context.hpp

@@ -54,7 +54,7 @@ namespace Catch {
         void handleMessage
                 (   AssertionInfo const& info,
                     ResultWas::OfType resultType,
-                    StringRef const& message,
+                    StringRef message,
                     AssertionReaction& reaction ) override;
         void handleUnexpectedExceptionNotThrown
                 (   AssertionInfo const& info,

src/catch2/internal/catch_test_case_registry_impl.cpp

@@ -149,7 +149,7 @@ namespace {
         m_testAsFunction();
     }
 
-    std::string extractClassName( StringRef const& classOrQualifiedMethodName ) {
+    std::string extractClassName( StringRef classOrQualifiedMethodName ) {
         std::string className(classOrQualifiedMethodName);
         if( startsWith( className, '&' ) )
         {

src/catch2/internal/catch_test_case_registry_impl.hpp

@@ -64,7 +64,7 @@ namespace Catch {
     };
 
 
-    std::string extractClassName( StringRef const& classOrQualifiedMethodName );
+    std::string extractClassName( StringRef classOrQualifiedMethodName );
 
     ///////////////////////////////////////////////////////////////////////////
 

src/catch2/internal/catch_test_registry.cpp

@@ -17,7 +17,7 @@ namespace Catch {
         return Detail::unique_ptr<ITestInvoker>( new TestInvokerAsFunction( testAsFunction ));
     }
 
-    AutoReg::AutoReg( Detail::unique_ptr<ITestInvoker> invoker, SourceLineInfo const& lineInfo, StringRef const& classOrMethod, NameAndTags const& nameAndTags ) noexcept {
+    AutoReg::AutoReg( Detail::unique_ptr<ITestInvoker> invoker, SourceLineInfo const& lineInfo, StringRef classOrMethod, NameAndTags const& nameAndTags ) noexcept {
         CATCH_TRY {
             getMutableRegistryHub()
                     .registerTest(

src/catch2/internal/catch_test_registry.hpp

@@ -46,15 +46,15 @@ Detail::unique_ptr<ITestInvoker> makeTestInvoker( void (C::*testAsMethod)() ) {
 }
 
 struct NameAndTags {
-    NameAndTags(StringRef const& name_ = StringRef(),
+    constexpr NameAndTags( StringRef name_ = StringRef(),
-                StringRef const& tags_ = StringRef()) noexcept:
+                           StringRef tags_ = StringRef() ) noexcept:
-        name(name_), tags(tags_) {}
+        name( name_ ), tags( tags_ ) {}
     StringRef name;
     StringRef tags;
 };
 
 struct AutoReg : Detail::NonCopyable {
-    AutoReg( Detail::unique_ptr<ITestInvoker> invoker, SourceLineInfo const& lineInfo, StringRef const& classOrMethod, NameAndTags const& nameAndTags ) noexcept;
+    AutoReg( Detail::unique_ptr<ITestInvoker> invoker, SourceLineInfo const& lineInfo, StringRef classOrMethod, NameAndTags const& nameAndTags ) noexcept;
 };
 
 } // end namespace Catch

src/catch2/matchers/internal/catch_matchers_combined_tu.cpp

@@ -29,7 +29,7 @@ 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 const& matcherString  ) {
+    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef matcherString  ) {
         std::string exceptionMessage = Catch::translateActiveException();
         MatchExpr<std::string, StringMatcher const&> expr( std::move(exceptionMessage), matcher, matcherString );
         handler.handleExpr( expr );

src/catch2/matchers/internal/catch_matchers_impl.hpp

@@ -19,7 +19,7 @@ namespace Catch {
         MatcherT const& m_matcher;
         StringRef m_matcherString;
     public:
-        MatchExpr( ArgT && arg, MatcherT const& matcher, StringRef const& matcherString )
+        MatchExpr( ArgT && arg, MatcherT const& matcher, StringRef matcherString )
         :   ITransientExpression{ true, matcher.match( arg ) }, // not forwarding arg here on purpose
             m_arg( std::forward<ArgT>(arg) ),
             m_matcher( matcher ),
@@ -43,10 +43,10 @@ namespace Catch {
 
     using StringMatcher = Matchers::MatcherBase<std::string>;
 
-    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef const& matcherString  );
+    void handleExceptionMatchExpr( AssertionHandler& handler, StringMatcher const& matcher, StringRef matcherString  );
 
     template<typename ArgT, typename MatcherT>
-    auto makeMatchExpr( ArgT && arg, MatcherT const& matcher, StringRef const& matcherString  ) -> MatchExpr<ArgT, MatcherT> {
+    auto makeMatchExpr( ArgT && arg, MatcherT const& matcher, StringRef matcherString  ) -> MatchExpr<ArgT, MatcherT> {
         return MatchExpr<ArgT, MatcherT>( std::forward<ArgT>(arg), matcher, matcherString );
     }