If the `enum` that defines SDL_QUIT is marked `{.pure.}`, then you have to
refer to SDL_QUIT as [fully
qualified](https://nim-lang.org/docs/manual.html#pragmas-pure-pragma)
type
sdlEv {.pure.} = enum
...
SDL_QUIT,
...
if e.`type` == sdlEv.SDL_QUIT:
SDL_Quit()
It makes your code much more verbose, and may not be style you want your code
to be, but may be an option.
Also note, in writing this in Nim, should try for [NEP1 coding
style](https://nim-lang.org/docs/nep1.html) to be consistent with other Nim
programs (but then not consistent with SDL C .... and yes, my example wasn't
NEP1 either)
