From: samuel@oriontransfer.net
To: ruby-core@ruby-lang.org
Subject: [ruby-core:95428] [Ruby master Feature#16253] Shorthand "forward everything" syntax
Date: Sat, 19 Oct 2019 02:56:37 +0000 (UTC) [thread overview]
Message-ID: <redmine.journal-82182.20191019025637.9e76ba2b74505630@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-16253.20191015153838@ruby-lang.org
Issue #16253 has been updated by ioquatix (Samuel Williams).
The reason to support `...` with other args is something like this:
```
class Controller < Container::Controller
def initialize(command, *arguments, **options, &block)
@command = command
super(*arguments, **options, &block)
end
end
# Nicer?
class Controller < Container::Controller
def initialize(command, ...)
@command = command
super(...)
end
end
```
I think `...` should be remainder of arguments that aren't explicitly consumed. Semantics might be a little bit more tricky to implement, but it makes a lot of sense to me and there are *many* places where such a syntax would make things not only clearer, but also faster by eliding allocations for `*arguments` and `**options`.
----------------------------------------
Feature #16253: Shorthand "forward everything" syntax
https://bugs.ruby-lang.org/issues/16253#change-82182
* Author: Dan0042 (Daniel DeLorme)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
----------------------------------------
What about using this:
```ruby
def foo(*)
@bar.foo(*)
```
to mean this:
```ruby
def foo(*a, **o, &b)
@bar.foo(*a, **o, &b)
```
I used `def foo(*)` because that's currently valid ruby code, but I'm fine with any syntax.
It's like the no-parentheses `super` shorthand, but for any method.
It makes it easier to write correct forwarding code.
If rubyists must be told they have to change their forwarding code in 2.7 (due to keyword arguments), the pill might be easier to swallow if the change is a reduction rather than an increase in verbosity.
And we'd even be future-proof if an eventual FOURTH kind of parameter is introduced!!!!
--
https://bugs.ruby-lang.org/
next prev parent reply other threads:[~2019-10-19 2:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <redmine.issue-16253.20191015153838@ruby-lang.org>
2019-10-15 15:38 ` [ruby-core:95338] [Ruby master Feature#16253] Shorthand "forward everything" syntax daniel
2019-10-15 15:53 ` [ruby-core:95340] " eregontp
2019-10-15 17:20 ` [ruby-core:95342] " shevegen
2019-10-16 10:33 ` [ruby-core:95364] " eregontp
2019-10-16 13:05 ` [ruby-core:95366] " daniel
2019-10-16 13:17 ` [ruby-core:95367] " zverok.offline
2019-10-16 16:55 ` [ruby-core:95370] " merch-redmine
2019-10-16 17:32 ` [ruby-core:95371] " daniel
2019-10-18 23:17 ` [ruby-core:95426] " samuel
2019-10-18 23:33 ` [ruby-core:95427] " merch-redmine
2019-10-19 2:56 ` samuel [this message]
2019-10-20 11:56 ` [ruby-core:95437] " nobu
2019-10-20 12:07 ` [ruby-core:95439] " nobu
2019-10-22 19:37 ` [ruby-core:95478] " keystonelemur
2019-11-10 10:27 ` [ruby-core:95773] " eregontp
2019-11-10 10:39 ` [ruby-core:95774] " mame
2019-11-10 21:23 ` [ruby-core:95778] " eregontp
2019-11-10 21:41 ` [ruby-core:95779] " merch-redmine
2019-11-10 22:57 ` [ruby-core:95782] " eregontp
2019-11-27 16:51 ` [ruby-core:95994] " eregontp
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