From: Pavel Rosputko <redmine@...>
Date: 2010-12-22T05:01:20+09:00
Subject: [ruby-core:33802] [Ruby 1.9-Feature#4184][Open] String that has the same object_id in an each occurrence in a code

Feature #4184: String that has the same object_id in an each occurrence in a code
http://redmine.ruby-lang.org/issues/show/4184

Author: Pavel Rosputko
Status: Open, Priority: Normal

Regexp literals:
5.times { p /abcdasdf/.object_id } -> same!

String literals:
5.times { 'asdasdf'.object_id } -> different

Propose:
5.times { %c(asdasdf).object_id } -> same!

Example of usefullness:

a,b,c,d = data.unpack %c(ccNc) |
e,f,g,h = a.unpack %c(cvaN)    |  repeated many times

Aspects:
 - String like 'ccNc' are created many times
 - Not modified
 - Used once in code

It is possible to write "class K; Format_ccNc = 'ccNc'; end"
but Format_ccNc will be used only once!

It is logical to make %c() strings frozen.


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