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Source for ticket #532
cc
changetime
2013-07-07 03:20:44
component
WG1 - Core
description
Jörg F. Wittenberger posted to [http://lists.nongnu.org/archive/html/chicken-hackers/2013-05/msg00039.html chicken-hackers]:
I really don't like that the draft still leaves it undefined what the result of `(force <promise>`) is, if the promise returns multiple values. `Force` [and] `delay` are not that complicated to implement. The way the R7RS draft is now, one would still need to duplicate the definition in applications if one wanted to be sure that multiple values are ok.
Because multiple values are not first class, supporting this requires collecting the multiple values in a data structure such as a list, remembering that they are not really a list but multiple values, and then returning them as multiple values. You get no space benefit that way, and might as well put a call to `call-with-values` inside the `delay`.
id
532
keywords
milestone
owner
alexshinn
priority
major
reporter
cowan
resolution
wontfix
severity
status
closed
summary
Delaying multiple values shouldn't be undefined
time
2013-05-13 18:17:14
type
defect
Changes
Change at time 2013-07-07 03:20:44
author
cowan
field
comment
newvalue
The WG decided by unanimous consent to take no action on this ticket.
oldvalue
1
raw-time
1373142044410382
ticket
532
time
2013-07-07 03:20:44
Change at time 2013-07-07 03:20:44
author
cowan
field
resolution
newvalue
wontfix
oldvalue
raw-time
1373142044410382
ticket
532
time
2013-07-07 03:20:44
Change at time 2013-07-07 03:20:44
author
cowan
field
status
newvalue
closed
oldvalue
new
raw-time
1373142044410382
ticket
532
time
2013-07-07 03:20:44