racket/collects/scribblings/reference/exit.scrbl

24 lines
746 B
Racket

#lang scribble/doc
@(require "mz.ss")
@title{Exiting}
@defproc[(exit [v any/c #t]) any]{
Passes @racket[v] to the current @tech{exit handler}. If the exit
handler does not escape or terminate the thread, @|void-const| is
returned.}
@defparam[exit-handler proc (any/c . -> . any)]{
A parameter that determines the current @deftech{exit handler}. The
@tech{exit handler} is called by @racket[exit].
The default @tech{exit handler} in the Racket executable
takes any argument and shuts down the OS-level Racket process. The
argument is used as the OS-level exit code if it is an exact integer
between @racket[1] and @racket[255] (which normally means
``failure''); otherwise, the exit code is @racket[0], (which normally
means ``success'').}