"Restrict" qualifier not reconised in C headers.

[thepigeongenerator]

OS: Linux
EDITOR: neovim
CC: gcc
VERSION 0.20250815.1

It appears that C++ is assumed over C, in *.h header files.
Personally, I am under the opinion C++ should leave C++-specific code in *.hh or *.hpp or whatever other combination of file extensions were standard. But, this isn't the case and I cannot do anything about that.

I am unaware how the code is structured, and I might take a peek at a later date. However, some potential solutions I have in mind are:

• "pretending" a macro is defined for restrict pointing to __restrict__, this might signal to the user that some funky stuff may be happening to restrict.
• Otherwise, mark restrict as a valid keyword in *.h files, and let the compiler solve the confusion on the user's end.

Interestingly, when I defined a macro in my codebase like this:

#if defined(__cplusplus)
#define restrict __restrict__
#endif

It is assumed that the restrict qualifier is using the macro.

[thepigeongenerator]

Verified in d31cc9f