From: "matz (Yukihiro Matsumoto)" <matz@...>
Date: 2013-03-27T05:43:51+09:00
Subject: [ruby-core:53748] [ruby-trunk - Bug #8168][Feedback] Feature request: support for (single) statement lambda syntax/definition


Issue #8168 has been updated by matz (Yukihiro Matsumoto).

Status changed from Open to Feedback
Assignee set to matz (Yukihiro Matsumoto)

=begin
What if the lambda takes the parameter e.g. (({->(x){x*x}}))?

Matz.
=end
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Bug #8168: Feature request: support for (single) statement lambda syntax/definition
https://bugs.ruby-lang.org/issues/8168#change-37945

Author: garysweaver (Gary Weaver)
Status: Feedback
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: 
ruby -v: ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin11.4.2]


Abstract: Proposal for single statement lambda support, either via a new type of stab '->>', such that '->> some value;' would be equivalent to '-> {some value;}', or by just supplying a stab operator '->' with a value instead of a block (which would be more intuitive).

Background: Often proc and lambda blocks are one statement long. Braces or do/end in this case are mostly unnecessary and result in less beautiful code

Pros: may reduce amount of syntax required, especially if can re-use same operator.

Cons: different stab operator may be confusing because of similarity to existing lambda operator. With either proposal, may cause additional overhead for interpreters.



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