# SDL_NULL_WHILE_LOOP_CONDITION A macro for wrapping code in `do {} while (0);` without compiler warnings. ## Header File Defined in [<SDL3/SDL_assert.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_assert.h) ## Syntax ```c #define SDL_NULL_WHILE_LOOP_CONDITION (0) ``` ## Remarks Visual Studio with really aggressive warnings enabled needs this to avoid compiler complaints. the `do {} while (0);` trick is useful for wrapping code in a macro that may or may not be a single statement, to avoid various C language accidents. To use: ```c do { SomethingOnce(); } while (SDL_NULL_WHILE_LOOP_CONDITION (0)); ``` ## Version This macro is available since SDL 3.2.0. ---- [CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryAssert](CategoryAssert)