Some refactorings:

- Overrides added
 - usages of push_back() replaced with emplace_back()
 - Loop variable made const-refernce
 - NULL replaced with nullptr
 - Names used in the declaration and definition unified
 - size() replaced with empty
 - Identical cases merged

examples/210-Evt-EventListeners.cpp

@@ -30,7 +30,7 @@ std::ostream& operator<<(std::ostream& out, Catch::Tag t) {
 template< typename T >
 std::ostream& operator<<( std::ostream& os, std::vector<T> const& v ) {
     os << "{ ";
-    for ( auto x : v )
+    for ( const auto& x : v )
         os << x << ", ";
     return os << "}";
 }
@@ -63,7 +63,7 @@ void print( std::ostream& os, int const level, Catch::MessageInfo const& info )
 
 void print( std::ostream& os, int const level, std::string const& title, std::vector<Catch::MessageInfo> const& v ) {
     os << ws(level  ) << title << ":\n";
-    for ( auto x : v )
+    for ( const auto& x : v )
     {
         os << ws(level+1) << "{\n";
         print( os, level+2, x );

examples/231-Cfg-OutputStreams.cpp

@@ -18,7 +18,7 @@ class out_buff : public std::stringbuf {
 public:
     out_buff(std::FILE* stream):m_stream(stream) {}
     ~out_buff();
-    int sync() {
+    int sync() override {
         int ret = 0;
         for (unsigned char c : str()) {
             if (putc(c, m_stream) == EOF) {

src/catch2/catch_commandline.cpp

@@ -50,8 +50,7 @@ namespace Catch {
                         if( !startsWith( line, '"' ) )
                             line = '"' + line + '"';
                         config.testsOrTags.push_back( line );
-                        config.testsOrTags.push_back( "," );
+                        config.testsOrTags.emplace_back( "," );
-                        
                     }
                 }
                 //Remove comma in the end

src/catch2/catch_console_colour.cpp

@@ -34,7 +34,7 @@ namespace Catch {
         };
 
         struct NoColourImpl : IColourImpl {
-            void use( Colour::Code ) {}
+            void use( Colour::Code ) override {}
 
             static IColourImpl* instance() {
                 static NoColourImpl s_instance;
@@ -208,13 +208,13 @@ namespace Catch {
 namespace Catch {
 
     Colour::Colour( Code _colourCode ) { use( _colourCode ); }
-    Colour::Colour( Colour&& rhs ) noexcept {
+    Colour::Colour( Colour&& other ) noexcept {
-        m_moved = rhs.m_moved;
+        m_moved = other.m_moved;
-        rhs.m_moved = true;
+        other.m_moved = true;
     }
-    Colour& Colour::operator=( Colour&& rhs ) noexcept {
+    Colour& Colour::operator=( Colour&& other ) noexcept {
-        m_moved = rhs.m_moved;
+        m_moved = other.m_moved;
-        rhs.m_moved  = true;
+        other.m_moved  = true;
         return *this;
     }
 
@@ -226,7 +226,7 @@ namespace Catch {
         // However, under some conditions it does happen (see #1626),
         // and this change is small enough that we can let practicality
         // triumph over purity in this case.
-        if (impl != NULL) {
+        if (impl != nullptr) {
             impl->use( _colourCode );
         }
     }

src/catch2/catch_enum_values_registry.cpp

@@ -60,7 +60,7 @@ namespace Catch {
             assert( valueNames.size() == values.size() );
             std::size_t i = 0;
             for( auto value : values )
-                enumInfo->m_values.push_back({ value, valueNames[i++] });
+                enumInfo->m_values.emplace_back(value, valueNames[i++]);
 
             return enumInfo;
         }

src/catch2/catch_message.cpp

@@ -111,7 +111,7 @@ namespace Catch {
                 pos = skipq(pos, c);
                 break;
             case ',':
-                if (start != pos && openings.size() == 0) {
+                if (start != pos && openings.empty()) {
                     m_messages.emplace_back(macroName, lineInfo, resultType);
                     m_messages.back().message = static_cast<std::string>(trimmed(start, pos));
                     m_messages.back().message += " := ";
@@ -119,7 +119,7 @@ namespace Catch {
                 }
             }
         }
-        assert(openings.size() == 0 && "Mismatched openings");
+        assert(openings.empty() && "Mismatched openings");
         m_messages.emplace_back(macroName, lineInfo, resultType);
         m_messages.back().message = static_cast<std::string>(trimmed(start, names.size() - 1));
         m_messages.back().message += " := ";

src/catch2/catch_session.cpp

@@ -204,11 +204,11 @@ namespace Catch {
         char **utf8Argv = new char *[ argc ];
 
         for ( int i = 0; i < argc; ++i ) {
-            int bufSize = WideCharToMultiByte( CP_UTF8, 0, argv[i], -1, NULL, 0, NULL, NULL );
+            int bufSize = WideCharToMultiByte( CP_UTF8, 0, argv[i], -1, nullptr, 0, nullptr, nullptr );
 
             utf8Argv[ i ] = new char[ bufSize ];
 
-            WideCharToMultiByte( CP_UTF8, 0, argv[i], -1, utf8Argv[i], bufSize, NULL, NULL );
+            WideCharToMultiByte( CP_UTF8, 0, argv[i], -1, utf8Argv[i], bufSize, nullptr, nullptr );
         }
 
         int returnCode = applyCommandLine( argc, utf8Argv );

src/catch2/catch_test_case_tracker.cpp

@@ -224,8 +224,8 @@ namespace TestCaseTracking {
     void SectionTracker::addInitialFilters( std::vector<std::string> const& filters ) {
         if( !filters.empty() ) {
             m_filters.reserve( m_filters.size() + filters.size() + 2 );
-            m_filters.push_back(""); // Root - should never be consulted
+            m_filters.emplace_back(""); // Root - should never be consulted
-            m_filters.push_back(""); // Test Case - not a section filter
+            m_filters.emplace_back(""); // Test Case - not a section filter
             m_filters.insert( m_filters.end(), filters.begin(), filters.end() );
         }
     }

src/catch2/reporters/catch_reporter_junit.cpp

@@ -228,11 +228,7 @@ namespace Catch {
                     elementName = "error";
                     break;
                 case ResultWas::ExplicitFailure:
-                    elementName = "failure";
-                    break;
                 case ResultWas::ExpressionFailed:
-                    elementName = "failure";
-                    break;
                 case ResultWas::DidntThrowException:
                     elementName = "failure";
                     break;

tests/SelfTest/UsageTests/ToStringVector.tests.cpp

@@ -17,9 +17,9 @@ TEST_CASE( "vector<string> -> toString", "[toString][vector]" )
 {
     std::vector<std::string> vv;
     REQUIRE( ::Catch::Detail::stringify(vv) == "{  }" );
-    vv.push_back( "hello" );
+    vv.emplace_back( "hello" );
     REQUIRE( ::Catch::Detail::stringify(vv) == "{ \"hello\" }" );
-    vv.push_back( "world" );
+    vv.emplace_back( "world" );
     REQUIRE( ::Catch::Detail::stringify(vv) == "{ \"hello\", \"world\" }" );
 }