Man page - sdl_scanf_vararg_func(3)

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Manual

SDL_SCANF_VARARG_FUNC

NAME
HEADER FILE
SYNOPSIS
DESCRIPTION
AVAILABILITY

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NAME

SDL_SCANF_VARARG_FUNC - Macro that annotates a vararg function that operates like scanf.

HEADER FILE

Defined in SDL3/SDL_stdinc.h

SYNOPSIS

#include "SDL3/SDL.h"

#define SDL_SCANF_VARARG_FUNC( fmtargnumber ) __attribute__ (( format( __scanf__, fmtargnumber, fmtargnumber+1 )))

DESCRIPTION

If we were to annotate fscanf :

int fscanf(FILE *f, const char *fmt, ...) SDL_PRINTF_VARARG_FUNCV(2);

This notes that the second parameter should be a scanf-style format string, followed by ... . The compiler or other analysis tools can warn when this doesn’t appear to be the case.

On compilers without this annotation mechanism, this is defined to nothing.

This can (and should) be used with

SDL_SCANF_FORMAT_STRING
as well, which between them will cover at least Visual Studio, GCC, and Clang.

AVAILABILITY

This macro is available since SDL 3.2.0.

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