SDL_INVALID_UNICODE_CODEPOINT - The Unicode REPLACEMENT CHARACTER codepoint.

       This macro is available since SDL 3.2.0.

SDL_StepUTF8()  and  SDL_StepBackUTF8()  report  this  codepoint  when they encounter a UTF-8 string with
       encoding errors.

       This tends to render as something like a question mark in most places.

       SDL_INVALID_UNICODE_CODEPOINT - The Unicode REPLACEMENT CHARACTER codepoint.

SDL_StepBackUTF8(3), SDL_StepUTF8(3)

Simple Directmedia Layer                           SDL 3.2.20                   SDL_INVALID_UNICODE_CODEPOINT(3)

#include<SDL3/SDL_stdinc.h>#defineSDL_INVALID_UNICODE_CODEPOINT0xFFFD