Ignore clang warning Wnontrivial-memaccess (#8129)

Produced when memset(this, ..) is used on a non-trivially copyable type

backends/imgui_impl_metal.mm

@@ -38,6 +38,13 @@
 #import <time.h>
 #import <Metal/Metal.h>
 
+#if defined(__clang__)
+#if __has_warning("-Wunknown-warning-option")
+#pragma clang diagnostic ignored "-Wunknown-warning-option"         // warning: unknown warning group 'xxx'
+#endif
+#pragma clang diagnostic ignored "-Wnontrivial-memaccess"           // warning: first argument in call to 'memset' is a pointer to non-trivially copyable type
+#endif
+
 #pragma mark - Support classes
 
 // A wrapper around a MTLBuffer object that knows the last time it was reused

backends/imgui_impl_osx.mm

@@ -27,6 +27,13 @@
 #import <GameController/GameController.h>
 #import <time.h>
 
+#if defined(__clang__)
+#if __has_warning("-Wunknown-warning-option")
+#pragma clang diagnostic ignored "-Wunknown-warning-option"         // warning: unknown warning group 'xxx'
+#endif
+#pragma clang diagnostic ignored "-Wnontrivial-memaccess"           // warning: first argument in call to 'memset' is a pointer to non-trivially copyable type
+#endif
+
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2024-08-22: moved some OS/backend related function pointers from ImGuiIO to ImGuiPlatformIO:

imgui_draw.cpp

@@ -66,6 +66,7 @@ Index of this file:
 #pragma clang diagnostic ignored "-Wimplicit-int-float-conversion"  // warning: implicit conversion from 'xxx' to 'float' may lose precision
 #pragma clang diagnostic ignored "-Wreserved-identifier"            // warning: identifier '_Xxx' is reserved because it starts with '_' followed by a capital letter
 #pragma clang diagnostic ignored "-Wunsafe-buffer-usage"            // warning: 'xxx' is an unsafe pointer used for buffer access
+#pragma clang diagnostic ignored "-Wnontrivial-memaccess"           // warning: first argument in call to 'memset' is a pointer to non-trivially copyable type
 #elif defined(__GNUC__)
 #pragma GCC diagnostic ignored "-Wpragmas"                  // warning: unknown option after '#pragma GCC diagnostic' kind
 #pragma GCC diagnostic ignored "-Wunused-function"          // warning: 'xxxx' defined but not used

imgui_internal.h

@@ -91,6 +91,7 @@ Index of this file:
 #pragma clang diagnostic ignored "-Wmissing-noreturn"               // warning: function 'xxx' could be declared with attribute 'noreturn'
 #pragma clang diagnostic ignored "-Wdeprecated-enum-enum-conversion"// warning: bitwise operation between different enumeration types ('XXXFlags_' and 'XXXFlagsPrivate_') is deprecated
 #pragma clang diagnostic ignored "-Wunsafe-buffer-usage"            // warning: 'xxx' is an unsafe pointer used for buffer access
+#pragma clang diagnostic ignored "-Wnontrivial-memaccess"           // warning: first argument in call to 'memset' is a pointer to non-trivially copyable type
 #elif defined(__GNUC__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpragmas"              // warning: unknown option after '#pragma GCC diagnostic' kind