Visual Studio fails to respond to disable/enable select code paths with Preprocessor __clang__ and/or __llvm__

[GloriousPtr]

Issue:

#if defined(__clang__)
//this code won't execute
#endif

[zufuliu]

https://godbolt.org/z/n4vf9x54r

[zufuliu]

You probably handled _MSC_VER first which clang-cl also defines.

[GloriousPtr]

You're right, it does work but Visual Studio fails to reflect it in the editor.
VS clang cl manages to correctly disables the code in the editor.

LLVM_v43:

LLVM - clang-cl (Visual Studio addon):

[zufuliu]

There may needs further work as Visual Studio Code Analysis or IntelliSense doesn't understand clang extension.
e.g. for https://github.com/zufuliu/notepad2/blob/main/src/EditAutoC.c
There are 45 errors with LLVM_v143 (more errors with LLVM (clang-cl)).