SDL_NULL_WHILE_LOOP_CONDITION(3)

💅 SDL_NULL_WHILE_LOOP_CONDITION(3) 💅

okay bestie, so this is a page from the SDL3 FUNCTIONS manual — like, the whole SDL_NULL_WHILE_LOOP_CONDITION(3) situation — and honestly? it's a tiny macro with main character energy. it's literally just a fancy way of writing 0 so your compiler stops yelling at you. let's get into it 🫶

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✨ NAME ✨

SDL_NULL_WHILE_LOOP_CONDITION — a macro for wrapping code in do {} while (0); without compiler warnings. no cap, that's the whole job. 🌸

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✨ SYNOPSIS ✨

#include <SDL3/SDL_assert.h>

#define SDL_NULL_WHILE_LOOP_CONDITION (0)

that's it. that's the tea. 🍓

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✨ DESCRIPTION ✨

so here's the vibe: Visual Studio with really aggressive warnings enabled needs this, otherwise it throws a whole fit and complains at you. the macro is basically emotional support for your compiler. 😭

the do {} while (0); trick is lowkey iconic for wrapping code in a macro that may or may not be a single statement — which avoids various C language accidents. iykyk. like, if your macro expands to two statements and someone drops it inside an if without braces? disaster. this trick prevents that. slay.

to use it:

do { SomethingOnce(); } while (SDL_NULL_WHILE_LOOP_CONDITION (0));

notice how the loop condition is SDL_NULL_WHILE_LOOP_CONDITION (0) — it's a macro, and since it expands to (0), the loop body runs exactly once and then bails. it's giving "runs once, no notes." ✨💅

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✨ AVAILABILITY ✨

this macro has been available since SDL 3.2.0. so if you're on anything older, bestie… it's not there. 🧚

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fr fr, remember: the macro expands to (0). it's not a real condition, it's a warning-silencer with a cute little while on top. don't go trying to make it do anything else. 💀

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okay that's the page!! 💖 brought to you by the fine folks at Simple Directmedia Layer, SDL 3.4.18, and the classic SDL_NULL_WHILE_LOOP_CONDITION(3) energy. go forth and wrap your macros, bestie, and may your compiler never complain again 👑🌈⭐