Add Wsuggest-override to warning flags

CMake/MiscFunctions.cmake

@@ -61,6 +61,7 @@ function(add_warnings_to_targets targets)
           "-Wunused-function"
           "-Wcall-to-pure-virtual-from-ctor-dtor"
           "-Wdeprecated-register"
+          "-Wsuggest-override"
         )
         foreach(warning ${CHECKED_WARNING_FLAGS})
             add_cxx_flag_if_supported_to_targets(${warning} "${targets}")

src/catch2/internal/catch_clara.hpp

@@ -16,20 +16,22 @@
 #endif
 #define CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH CATCH_CONFIG_CONSOLE_WIDTH-1
 
-#ifdef __clang__
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wweak-vtables"
-#pragma clang diagnostic ignored "-Wexit-time-destructors"
-#pragma clang diagnostic ignored "-Wshadow"
-#pragma clang diagnostic ignored "-Wdeprecated"
+
+#if defined(__clang__)
+  #pragma clang diagnostic push
+  #pragma clang diagnostic ignored "-Wweak-vtables"
+  #pragma clang diagnostic ignored "-Wexit-time-destructors"
+  #pragma clang diagnostic ignored "-Wshadow"
+  #pragma clang diagnostic ignored "-Wdeprecated"
 #endif
 
 #include <catch2/internal/catch_clara_upstream.hpp>
 
-#ifdef __clang__
-#pragma clang diagnostic pop
+#if defined(__clang__)
+  #pragma clang diagnostic pop
 #endif
 
+
 // Restore Clara's value for console width, if present
 #ifdef CATCH_TEMP_CLARA_CONFIG_CONSOLE_WIDTH
 #define CATCH_CLARA_TEXTFLOW_CONFIG_CONSOLE_WIDTH CATCH_TEMP_CLARA_CONFIG_CONSOLE_WIDTH

src/catch2/internal/catch_clara_upstream.hpp

@@ -705,7 +705,7 @@ namespace detail {
     };
     struct BoundFlagRefBase : BoundRef {
         virtual auto setFlag( bool flag ) -> ParserResult = 0;
-        virtual auto isFlag() const -> bool { return true; }
+        bool isFlag() const override { return true; }
     };
 
     template<typename T>

src/catch2/internal/catch_run_context.hpp

@@ -105,7 +105,7 @@ namespace Catch {
 
     public:
         // !TBD We need to do this another way!
-        bool aborting() const final;
+        bool aborting() const override;
 
     private: