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36 messages 2013/05/02

[#54749] [ruby-trunk - Feature #8361][Open] Alternative syntax for block parameter — "alexeymuranov (Alexey Muranov)" <redmine@...>

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[#54798] [ruby-trunk - Bug #8370][Open] Constants MAX_MULTIPART_LENGTH in cgi\core.rb — "xibbar (Takeyuki FUJIOKA)" <xibbar@...>

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[#54850] [ruby-trunk - Feature #8377][Open] Deprecate :: for method calls in 2.1 — "charliesome (Charlie Somerville)" <charliesome@...>

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[#54881] [ruby-trunk - Bug #8384][Open] Cannot build ruby against OpenSSL build with "no-ec2m" — "vo.x (Vit Ondruch)" <v.ondruch@...>

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[#54921] [ruby-trunk - Bug #8393][Open] A class who's parent class is in a module can go wrong if files are required in the wrong order — "eLobato (Daniel Lobato Garcia)" <elobatocs@...>

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[#54939] [ruby-trunk - Bug #8399][Open] Remove usage of RARRAY_PTR in C extensions when not needed — "dbussink (Dirkjan Bussink)" <d.bussink@...>

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[#55053] [ruby-trunk - Feature #8426][Open] Implement class hierarchy method caching — "charliesome (Charlie Somerville)" <charliesome@...>

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11 messages 2013/05/29

[ruby-core:54947] [ruby-trunk - Bug #8398][Rejected] case/when shouldn't try to evaluate all AND joined conditions if one of preceding was falsy

From: "nobu (Nobuyoshi Nakada)" <nobu@...>
Date: 2013-05-13 00:44:09 UTC
List: ruby-core #54947
Issue #8398 has been updated by nobu (Nobuyoshi Nakada).

Status changed from Open to Rejected


----------------------------------------
Bug #8398: case/when shouldn't try to evaluate all AND joined conditions if one of preceding was falsy 
https://bugs.ruby-lang.org/issues/8398#change-39287

Author: goshakkk (Gosha Arinich)
Status: Rejected
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: 1.9.3, 2.0.0
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


=begin

Steps to reproduce:

 case 1
 when String && proc { |x| x.blah }
   :something
 else
   :no
 end

Here is how I thought it works: goes to the first 'when', evals the first condition ((({1 === String}))), sees it's false and proceeds to the next (({when})) (or (({else}))) and happily returns (({:no})).

As it turns out, even if one of AND joined conditions was false, ruby would still try to eval other conditions, and as soon as it calls the block with 1, (({NoMethodError})) gets thrown as there is no (({#blah})) on Integer.

I believe this is incorrect behavior and conditions with AND in case/when should behave like everywhere else.

=end



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