SDL_PRINTF_FORMAT_STRING(3)

SDL_PRINTF_FORMAT_STRING 💅✨

okay bestie, welcome to the SDL3 FUNCTIONS manual, page SDL_PRINTF_FORMAT_STRING(3). this one's short and sweet but it's lowkey doing the lord's work, so let's get into it 🫶

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🌸 NAME 🌸

SDL_PRINTF_FORMAT_STRING — the macro that annotates function params as printf-style format strings. yes ma'am, it's giving helpful compiler hints and we're obsessed 💖

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✨ SYNOPSIS ✨

#include <SDL3/SDL_stdinc.h>

#define SDL_PRINTF_FORMAT_STRING _Printf_format_string_

periodt. that's the whole thing. copy it exactly, no cap 🔥

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💜 DESCRIPTION 💜

so here's the vibe. say we wanted to annotate fprintf — like, actually write it out with this macro slapped on:

int fprintf(FILE *f, SDL_PRINTF_FORMAT_STRING const char *fmt, ...);

what this does is note that fmt should be a printf-style format string. that's it. that's the job 🎀

and why do we care?? because once you've said that, the compiler or other analysis tools can warn when this doesn't appear to be the case. so if you fumble the format string (we've all been there, no judgment 🙈), the tooling can catch it for you instead of letting it slide until runtime. main character energy for real 👑

now the little plot twist: on compilers without this annotation mechanism, this is defined to nothing. literally nothing. it just vanishes. so it's fully safe to sprinkle around — on those compilers it's a no-op, and on the ones that get it, you get free warnings. iykyk 🌈

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⭐ AVAILABILITY ⭐

this macro is available since SDL 3.2.0. so if you're on something older… bestie. upgrade. 💀

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heads up: the exact spelling matters here — it's SDL_PRINTF_FORMAT_STRING on the outside, and it expands to _Printf_format_string_ under the hood. don't freestyle it, fr fr. 🦋

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and that's the page!! short, iconic, no notes. this lil guy ships with Simple Directmedia Layer, straight out of the SDL 3.4.18 era. mwah 💋 go annotate something and slay 🍓🧚