Feature #8600: Recognize variables declared in if modifier at end of line

• Status: Rejected
• Priority: Normal
• Assignee: -
• Target version: 2.6

[rudolph9 (Kurt Rudolph)]

=begin
2.0.0 (main):0 > .ruby -v
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-darwin12.3.0]
2.0.0 (main):0 > ([0,1,2])[i] = 1.0 if i = ['seconds'].find_index('seconds')
NameError: undefined local variable or method i' for main:Object from (pry):1:in pry'

Is it possible to get rid of this kind of error? Especially since it doesn't matter what the value of the variable is so long as it's defined.

2.0.0 (main):0 > i = 10000
=> 10000
2.0.0 (main):0 > ([0,1,2])[i] = 1.0 if i = ['seconds'].find_index('seconds')
=> 1.0
=end

[rosenfeld (Rodrigo Rosenfeld Rosas)]

A long-time +1, but if I remember correctly Matz doesn't want this because it could introduce backward incompatibility...

[rosenfeld (Rodrigo Rosenfeld Rosas)]

Or maybe because it would be too complex to change the parser to support that? Now I'm not sure about the reasons...

[matz (Yukihiro Matsumoto)]

• Description updated (diff)
• Status changed from Open to Rejected

Variables are declared in the order of appearance. I don't want to introduce exceptions.

Matz.

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)