[ruby-core:85342] [CommonRuby Feature#13581] Syntax sugar for method reference

Issue #13581 has been updated by Hanmac (Hans Mackowiak).


nobu (Nobuyoshi Nakada) wrote:
> Hanmac (Hans Mackowiak) wrote:
> > i don't know about the rubyVM but can `xyz(&method(:symbol))` or `xyz(&obj.method(:symbol))` be optimized like `xyz(&:symbol)` is?
> 
> They have different meanings all.
> 
> `xyz(&method(:symbol))` == `xyz {|x| symbol(x)}`
> `xyz(&obj.method(:symbol))` == `xyz {|x| obj.symbol(x)}`
> `xyz(&:symbol)` == `xyz {|x| x.symbol}`

i know they are different meanings,
i was just wondering if they can be optimized for the VM too, to make them run faster if able
like with not creating extra ruby objects if not needed

----------------------------------------
Feature #13581: Syntax sugar for method reference
https://bugs.ruby-lang.org/issues/13581#change-70127

* Author: americodls (Americo Duarte)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
Some another programming languages (even Java, in version 8) has a cool way to refer a method as a reference.

I wrote some examples here: https://gist.github.com/americodls/20981b2864d166eee8d231904303f24b

I miss this thing in ruby.

I would thinking if is possible some like this:

~~~
roots = [1, 4, 9].map &Math.method(:sqrt)
~~~

Could be like this:

~~~
roots = [1, 4, 9].map Math->method
~~~

What do you guys thinking about it?



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