[ruby-core:113067] [Ruby master Feature#19559] Introduce `Symbol#+@` and `Symbol#-@`, and eventually replace boolean arguments with symbols
From:
"matz (Yukihiro Matsumoto) via ruby-core" <ruby-core@...>
Date:
2023-04-01 04:43:58 UTC
List:
ruby-core #113067
Issue #19559 has been updated by matz (Yukihiro Matsumoto).
Status changed from Open to Rejected
Giving `:"-exception"` symbol (plain) argument a meaning `exception: false` keyword argument is inconsistent. Making a few less strokes does not justify this weirdness.
Matz.
----------------------------------------
Feature #19559: Introduce `Symbol#+@` and `Symbol#-@`, and eventually replace boolean arguments with symbols
https://bugs.ruby-lang.org/issues/19559#change-102601
* Author: sawa (Tsuyoshi Sawada)
* Status: Rejected
* Priority: Normal
----------------------------------------
I propose to define `Symbol#+@` and `Symbol#-@`, so that we can add positive or negative polarity to symbols. A possible implementation can be equivalent to what can be achieved by this:
```ruby
class Symbol
def -@; "-#{self}".to_sym end
def +@; self end
end
```
The intention behind this is to, eventually, replace boolean positional or keyword arguments with symbols so that, instead of this:
```ruby
"foo".methods(false)
gets(chomp: true)
Integer("2.3", exception: false)
```
we can write like this:
```ruby
"foo".methods(-:inherit)
gets(+:chomp)
Integer("2.3", -:exception)
```
--
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