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

NAME
SDL_LINE - A macro that reports the current line number of the file being compiled.
HEADER FILE
Defined in SDL3/SDL_assert.h
SYNOPSIS
#include "SDL3/SDL.h" #define SDL_LINE __LINE__
AVAILABILITY
This macro is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_LINE(3)