From: zverok.offline@...
Date: 2018-01-24T09:18:56+00:00
Subject: [ruby-core:85048] [Ruby trunk Feature#14390] UnboundMethod#to_proc

Issue #14390 has been reported by zverok (Victor Shepelev).

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Feature #14390: UnboundMethod#to_proc
https://bugs.ruby-lang.org/issues/14390

* Author: zverok (Victor Shepelev)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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I believe that it could be somewhat useful to have UnboundMethod converted to proc (accepting the object to bind to, as a first argument).

Practical(ish) example, paired with [Proc#rcurry](https://bugs.ruby-lang.org/issues/11161) proposal:

```ruby
URLS.
  map(&Faraday.method(:get).rcurry[some_get_param: 'value']).
  map(&JSON.method(:parse).rcurry[symbolize_names: true]).
  map(&Hash.instance_method(:dig).rcurry[:foo :bar, :baz])
```

It is somewhat more verbose than a lot of alternative proposals for "shorthand of &method call with arguments", yet requires no changes in parser or language design. With some future shortcuts/operators for `#method` and `#instance_method` it can even become pretty short and look like an "idiom".



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