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by motorest 336 days ago
> I don't understand what you're saying here. #pragma once does the job that include guards used to do, (...)

They don't. They are not C++ and at most they are compiler-specific.

It's fine if you opt to not write C++ and instead target specific compilers instead. Just don't pretend it's not frowned upon or kosher.
2 comments
bogwog 336 days ago
TIL about the existence of a passionate #pragma once hating subculture.

Since you seem to be more knowledgeble about this, I'm curious to know which C++ compilers lack support? I know that at least the 3 big ones do (GCC, Clang, and MSVC) and they have for a very long time.

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jcelerier 336 days ago
it's absolutely not frowned upon in 2025. All the compilers that matter (GCC, Clang and MSVC) support and have supported them for two decades. Major projects use #pragma once internally - I see files using it in Qt, LLVM, etc.
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