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

NAME
SDL_TouchID - A unique ID for a touch device.
HEADER FILE
Defined in SDL3/SDL_touch.h
SYNOPSIS
#include "SDL3/SDL.h" typedef Uint64 SDL_TouchID;
DESCRIPTION
This ID is valid for the time the device is connected to the system, and is never reused for the lifetime of the application. The value 0 is an invalid ID.
AVAILABILITY
This datatype is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_TouchID(3type)