* [ruby-core:88785] [Ruby trunk Bug#15052] must not optimize `foo(**{})` out
[not found] <redmine.issue-15052.20180831120941@ruby-lang.org>
@ 2018-08-31 12:09 ` mame
2019-10-17 22:05 ` [ruby-core:95405] [Ruby master " merch-redmine
1 sibling, 0 replies; 2+ messages in thread
From: mame @ 2018-08-31 12:09 UTC (permalink / raw)
To: ruby-core
Issue #15052 has been reported by mame (Yusuke Endoh).
----------------------------------------
Bug #15052: must not optimize `foo(**{})` out
https://bugs.ruby-lang.org/issues/15052
* Author: mame (Yusuke Endoh)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
* ruby -v:
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
A keyword rest argument with empty hash, `**{}`, is removed during parsing phase. However, under the current spec of keyword parameters, this leads to a problem:
```
def foo(opt = "opt", **hsh)
p [opt, hsh]
end
foo({}, **{}) #=> expected: [{}, {}], actual: ["opt", {}]
```
`foo({}, **{})` is obviously expected to pass the first `{}` to `opt`, and the second `**{}` to `**hsh`. However, `**{}` is removed at parsing phase, sp the first `{}` is considered as a keyword rest argument, which causes the above strange result.
So, we cannot optimize `**{}` out, unless keyword argument is separated from normal arguments #14183. (The current spec is really intractable not only for Ruby users but also for Ruby developers!)
---Files--------------------------------
do-not-optimize-keyword-argument-with-empty-hash.patch (717 Bytes)
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 2+ messages in thread
* [ruby-core:95405] [Ruby master Bug#15052] must not optimize `foo(**{})` out
[not found] <redmine.issue-15052.20180831120941@ruby-lang.org>
2018-08-31 12:09 ` [ruby-core:88785] [Ruby trunk Bug#15052] must not optimize `foo(**{})` out mame
@ 2019-10-17 22:05 ` merch-redmine
1 sibling, 0 replies; 2+ messages in thread
From: merch-redmine @ 2019-10-17 22:05 UTC (permalink / raw)
To: ruby-core
Issue #15052 has been updated by jeremyevans0 (Jeremy Evans).
Status changed from Open to Closed
Fixed by commit:1d5066efb08cbb328ba528a5f8be1708584b659f.
----------------------------------------
Bug #15052: must not optimize `foo(**{})` out
https://bugs.ruby-lang.org/issues/15052#change-82136
* Author: mame (Yusuke Endoh)
* Status: Closed
* Priority: Normal
* Assignee:
* Target version:
* ruby -v:
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
A keyword rest argument with empty hash, `**{}`, is removed during parsing phase. However, under the current spec of keyword parameters, this leads to a problem:
```
def foo(opt = "opt", **hsh)
p [opt, hsh]
end
foo({}, **{}) #=> expected: [{}, {}], actual: ["opt", {}]
```
`foo({}, **{})` is obviously expected to pass the first `{}` to `opt`, and the second `**{}` to `**hsh`. However, `**{}` is removed at parsing phase, sp the first `{}` is considered as a keyword rest argument, which causes the above strange result.
So, we cannot optimize `**{}` out, unless keyword argument is separated from normal arguments #14183. (The current spec is really intractable not only for Ruby users but also for Ruby developers!)
---Files--------------------------------
do-not-optimize-keyword-argument-with-empty-hash.patch (717 Bytes)
--
https://bugs.ruby-lang.org/
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2019-10-17 22:05 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <redmine.issue-15052.20180831120941@ruby-lang.org>
2018-08-31 12:09 ` [ruby-core:88785] [Ruby trunk Bug#15052] must not optimize `foo(**{})` out mame
2019-10-17 22:05 ` [ruby-core:95405] [Ruby master " merch-redmine
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).