SDL_SCANF_VARARG_FUNCV3
Macro that annotates a va_list function that operates like scanf.
Usage
#include "SDL3/SDL.h"
#define SDL_SCANF_VARARG_FUNCV( fmtargnumber ) __attribute__(( format( __scanf__, fmtargnumber, 0 )))
Header file
Defined in SDL3/SDL_stdinc.h
Overview
If we were to annotate vfscanf :
-
int vfscanf(FILE *f, const char *fmt, va_list ap) SDL_PRINTF_VARARG_FUNCV(2);
This notes that the second parameter should be a scanf-style format string, followed by a va_list. 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.