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by jcelerier 2760 days ago
> I mean, it’s non-standard. What more do you need?

so are most programming languages used in the world. In practice, #pragma once is less trouble than #ifdef ; we had the debate just today in reddit :-) https://www.reddit.com/r/cpp/comments/a14o5q/real_world_prob...
2 comments
groby_b 2760 days ago
Nobody is proposing a non-standard language, that's the point. Literally the entire reason for having a coding standard is to have a well-defined subset of the language you're using.

Meanwhile, the "trouble" the reddit thread comes up with is copy/paste programming for #ifdef. That's a one-time effort of writing a commit hook that checks for that. But no amount of effort will ensure the next compiler you need supports #pragma once

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jcelerier 2760 days ago
> Literally the entire reason for having a coding standard is to have a well-defined subset of the language you're using.

that's a perversion of what "standards" means. Standards are originally there to codify existing practice, not to put new practice into existence. "#pragma once" is common enough that it has its own wikipedia page : https://en.wikipedia.org/wiki/Pragma_once with the list of all supported compilers.

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tdcbfdct3 2760 days ago
"#pragma once" used to cause GCC to launch a game of Tetris instead of compiling your code. Not super relevant today, but a fun fact.
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saagarjha 2760 days ago
IIRC, it cycled through NetHack, Rogue, and Tower of Hanoi.
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