Feature #4299

no warning: found = in conditional, should be ==

Added by znz (Kazuhiro NISHIYAMA) over 1 year ago. Updated 11 months ago.

[ruby-dev:43083]
Status:Feedback Start date:01/20/2011
Priority:Normal Due date:
Assignee:nobu (Nobuyoshi Nakada) % Done:

0%
Category:core
Target version:2.0.0

Description

http://d.hatena.ne.jp/nagachika/20110119/ruby_trunk_changes_30595_30603
で知ったのですが、右辺の種類によっては「warning: found = in conditional, should be ==」が出ないことがあるようです。

% ruby-trunk -ve '!_=""'
ruby 1.9.3dev (2011-01-20 trunk 30614) [i686-linux]
-e:1: warning: found = in conditional, should be ==
% ruby-trunk -ve '!_=1' 
ruby 1.9.3dev (2011-01-20 trunk 30614) [i686-linux]
-e:1: warning: found = in conditional, should be ==
% ruby-trunk -ve '!_={}'    
ruby 1.9.3dev (2011-01-20 trunk 30614) [i686-linux]
% ruby-trunk -ve '!_=[]'
ruby 1.9.3dev (2011-01-20 trunk 30614) [i686-linux]
%

History

[ruby-dev:43918]#1
Updated by naruse (Yui NARUSE) 11 months ago

  • Status changed from Open to Assigned
  • Assignee set to nobu (Nobuyoshi Nakada)

[ruby-dev:43927]#2
Updated by nahi (Hiroshi Nakamura) 11 months ago

  • Target version set to 1.9.3

#3
Updated by nobu (Nobuyoshi Nakada) 11 months ago

  • Tracker changed from Bug to Feature
  • Status changed from Assigned to Feedback
この警告が出るのは、右辺が静的なリテラル(数値と、式展開のない文字列、nil、false、true)であるときだけです。 つまり、実行時に動的に作られるArrayやHashに対して出ないのは意図的なものですが、この条件を拡げるべきだという論点はありうると思います。

#4
Updated by naruse (Yui NARUSE) 11 months ago

  • Target version changed from 1.9.3 to 2.0.0

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