From: sawadatsuyoshi@...
Date: 2020-03-01T17:31:19+00:00
Subject: [ruby-core:97320] [Ruby master Feature#16667] Allow parameters to Symbol#to_proc and Method#to_proc

Issue #16667 has been updated by sawa (Tsuyoshi Sawada).


I am not sure how allowing parameters to `Symbol#to_proc` and `Method#to_proc` would make:

```ruby
ary.map(:dig.to_proc(:id))
```

possible as `Array#map` does not take an argument. What do you want it to return?


Needless to say, it is entirely unclear how that, if possible, would replace:

```ruby
ary.map { |e| e.dig(:id) }
```

or how it is superior to writing like:

```ruby
ary.map { _1.dig(:id) }
```


----------------------------------------
Feature #16667: Allow parameters to Symbol#to_proc and Method#to_proc
https://bugs.ruby-lang.org/issues/16667#change-84443

* Author: jgomo3 (Jes�s G�mez)
* Status: Open
* Priority: Normal
----------------------------------------
Allow parameters to Symbol#to_proc and Method#to_proc

So we can say:

``` ruby
ary.map(:dig.to_proc(:id))
```


Instead of

``` ruby
ary.map { |e| e.dig(:id) }
```


Oppening the posibilities to refine the `&` operator in the future, for something like:


``` ruby
ary.map(&(:dig, :id))
```

Related:

* https://bugs.ruby-lang.org/issues/11161
* https://bugs.ruby-lang.org/issues/16435



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