Re: errno (was Re: C23 thoughts and opinions - why so conservative?)

On 5/27/2024 9:48 PM, Lawrence D'Oliveiro wrote:

On Sun, 26 May 2024 18:12:17 +0200, David Brown wrote:
 

Macros in C are not recursive. That stops them exploding, but also means
there's a lot you can't do with the preprocessor.

 String-based macros + recursive substitution = recipe for trouble.

It seems the preprocessor in BGBCC is likely not entirely conformant in this case...
If given a recursive macro, it will most likely just explode and probably crash the compiler...
Mostly as it handles macro-expansion by looping over the line and performing macro-substitutions until no more substitutions are seen, at which point it emits the line to the output buffer and moves on to the next line.