Does C allow Unicode identifiers now, or is that pseudo code? The code snippets also contain `&`, so something definitely went wrong with the transcoding to HTML.
Quoting cppreference:
An identifier is an arbitrarily long sequence of digits, underscores, lowercase and uppercase Latin letters, and Unicode characters specified using \u and \U escape notation(since C99), of class XID_Continue(since C23). A valid identifier must begin with a non-digit character (Latin letter, underscore, or Unicode non-digit character(since C99)(until C23), or Unicode character of class XID_Start)(since C23)). Identifiers are case-sensitive (lowercase and uppercase letters are distinct). Every identifier must conform to Normalization Form C.(since C23)
In practice depends on the compiler.
Implementation-defined until C99, explicitly possible via UCNs aince c99, possible with explicit encoding since C23, but literals are still implementation defined.
I can't even view the post, I just get some kind of content management system-like with the page as JSON or something, in pink-on-white. I'm super confused. :|
The answer to your question seems to (still) be "no".
Besides the sibling comment on C23, it does work fine on GCC.
https://godbolt.org/z/qKejzc1Kb
Whereas clang loudly complains,
https://godbolt.org/z/qWrccWzYW