suzanne.soy/racket
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Clarify current-future. (#1780)

Browse Source
This commit is contained in:
Sam Tobin-Hochstadt 2017-08-23 16:58:52 -04:00 committed by GitHub
parent e9f2c084eb
commit 3dd17c73ed
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
pkgs/racket-doc/scribblings/reference/futures.scrbl
View File

@ -81,10 +81,12 @@ execute through a call to @racket[touch], however.
@defproc[(current-future) (or/c #f future?)]{
Returns the descriptor of the future whose thunk execution is the
current continuation. If a future thunk itself uses @racket[touch],
current continuation; that is, if a future descriptor @racket[f] is returned,
@racket[(touch f)] will produce the result of the current continuation.
If a future thunk itself uses @racket[touch],
future-thunk executions can be nested, in which case the descriptor of
the most immediately executing future is returned. If the current
continuation is not a future-thunk execution, the result is
continuation does not return to the @racket[touch] of any future, the result is
@racket[#f].
}