Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_arraysize - The number of elements in a static array.
HEADER FILE
Defined in SDL3/SDL_stdinc.h
SYNOPSIS
#include "SDL3/SDL.h" #define SDL_arraysize(array) (sizeof(array)/sizeof(array[0]))
DESCRIPTION
This will compile but return incorrect results for a pointer to an array; it has to be an array the compiler knows the size of. This macro looks like it double-evaluates the argument, but it does so inside of sizeof , so there are no side-effects here, as expressions do not actually run any code in these cases.
AVAILABILITY
This macro is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_arraysize(3)