From: Rick Lloyd <redmine@...>
Date: 2009-04-18T05:50:35+09:00
Subject: [ruby-core:23242] [Bug #1389] Use of ":" as synonym for "do" and "then"

Bug #1389: Use of ":" as synonym for "do" and "then"
http://redmine.ruby-lang.org/issues/show/1389

Author: Rick Lloyd
Status: Open, Priority: Normal
ruby -v: 1.9.1p0

A review of syntax.y from ruby 1.8.7 and 1.9.1 shows the grammar rule for then no longer includes the literal symbol ':'.  This change causes commonly used idioms for case expressions and loops to fail.  These no longer work:

case
when CONDITION : 
 BODY
end

while BOOLEAN :
 BODY
end

until BOOLEAN :
 BODY
end

for NAME in EXPRESSION :
 BODY
end

Am I mistaken?  Is this a feature?


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