Are you talking about #include being differently handled by the pre-processor than #pragma?

And/or about different preprocessing phases and handling of macro expansion?

You are using #include once inside a condition, is this on purpose for showing some difference to #pragma once?
 

-----Ursprüngliche Nachricht-----
Von: Muhammad via Std-Proposals <std-proposals@lists.isocpp.org>
Gesendet: So 23.03.2025 07:34
Betreff: Re: [std-proposals] #pragma once safer alternative
An: std-proposals@lists.isocpp.org;
CC: Muhammad <mail@muhamad.me>;

OK, let's revisit #include for a minute. When the compiler hit the #include directive it will add the content of that file in-place of that directive and then will recursively scan the content for other #include for expansion.