From: nobu@...
Date: 2019-04-01T05:36:04+00:00
Subject: [ruby-core:92078] [Ruby trunk Feature#12240] circle number arguments

Issue #12240 has been updated by nobu (Nobuyoshi Nakada).


As now we have `@1` and so on, revised and refined this patch.
https://github.com/nobu/ruby/pull/new/feature/circled_numparams

----------------------------------------
Feature #12240: circle number arguments
https://bugs.ruby-lang.org/issues/12240#change-77409

* Author: nobu (Nobuyoshi Nakada)
* Status: Rejected
* Priority: Normal
* Assignee: joke
* Target version: 
----------------------------------------
Often improvements about implicit block argument have been proposed, but in vain.

Such as:

~~~ruby
[[1, 2], [3, 4]].map {|a1, a2| a1+a2} #=> [3, 7]
~~~
to

~~~ruby
[[1, 2], [3, 4]].map {_1+_2}
~~~

Now, we (ko1 and nobu) found and propose the *perfect* solution.

~~~ruby
[[1, 2], [3, 4]].map {���+���}
~~~

`���`..`���` denote the arguments upto 20.

https://github.com/ruby/ruby/compare/trunk...nobu:feature/number-arg



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