[#44036] [ruby-trunk - Feature #6242][Open] Ruby should support lists — "shugo (Shugo Maeda)" <redmine@...>

20 messages 2012/04/01

[#44084] [ruby-trunk - Bug #6246][Open] 1.9.3-p125 intermittent segfault — "jshow (Jodi Showers)" <jodi@...>

22 messages 2012/04/02

[#44156] [ruby-trunk - Feature #6265][Open] Remove 'useless' 'concatenation' syntax — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

45 messages 2012/04/06

[#44163] [ruby-trunk - Bug #6266][Open] encoding related exception with recent integrated psych — "jonforums (Jon Forums)" <redmine@...>

10 messages 2012/04/06

[#44303] [ruby-trunk - Feature #6284][Open] Add composition for procs — "pabloh (Pablo Herrero)" <pablodherrero@...>

57 messages 2012/04/12

[#44349] [ruby-trunk - Feature #6293][Open] new queue / blocking queues — "tenderlovemaking (Aaron Patterson)" <aaron@...>

10 messages 2012/04/13

[#44402] [ruby-trunk - Feature #6308][Open] Eliminate delegation from WeakRef — "headius (Charles Nutter)" <headius@...>

20 messages 2012/04/17

[#44403] [ruby-trunk - Feature #6309][Open] Add a reference queue for weak references — "headius (Charles Nutter)" <headius@...>

15 messages 2012/04/17

[#44533] [ruby-trunk - Bug #6341][Open] SIGSEGV: Thread.new { fork { GC.start } }.join — "rudolf (r stu3)" <redmine@...>

24 messages 2012/04/22

[#44630] [ruby-trunk - Feature #6361][Open] Bitwise string operations — "MartinBosslet (Martin Bosslet)" <Martin.Bosslet@...>

31 messages 2012/04/26

[#44648] [ruby-trunk - Feature #6367][Open] #same? for Enumerable — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

16 messages 2012/04/26

[#44704] [ruby-trunk - Feature #6373][Open] public #self — "trans (Thomas Sawyer)" <transfire@...>

61 messages 2012/04/27

[#44748] [ruby-trunk - Feature #6376][Open] Feature lookup and checking if feature is loaded — "trans (Thomas Sawyer)" <transfire@...>

13 messages 2012/04/28

[ruby-core:44207] [ruby-trunk - Feature #6265] Remove 'useless' 'concatenation' syntax

From: "mame (Yusuke Endoh)" <mame@...>
Date: 2012-04-09 03:43:58 UTC
List: ruby-core #44207
Issue #6265 has been updated by mame (Yusuke Endoh).


=begin
Matz,

> I agree with removing string concatenation in 3.0.

Okay.  Then, is the syntax deprecated in 2.0?
If so, it would be good to warn it.


 diff --git a/parse.y b/parse.y
 index 0393dc1..1726117 100644
 --- a/parse.y
 +++ b/parse.y
 @@ -3916,6 +3916,7 @@ string		: tCHAR
 		| string string1
 		    {
 		    /*%%%*/
 +			rb_warning0("string concatenation syntax is deprecated");
 			$$ = literal_concat($1, $2);
 		    /*%
 			$$ = dispatch2(string_concat, $1, $2);
 


Rodorigo,

> Yusuke, am I supposed to understand what you meant with the code in your last comment? If so, I didn't get it...

Sorry for the confusion.  The code is just a joke.
I can write such a code much easily without the syntax.

  eval$s=%q(puts(%(eval$s=%q(#$s)))#################################
  ##       ####       ####     ######       #####     ####        ##
  ##  #########  ###  ####  ##  #####  #########  ###  ######  #####
  ##  #########  ###  ####  ##  #####  #########  ###  ######  #####
  ##  #########  ###  ####  ##  #####  #########       ######  #####
  ##       ####       ####  ##  #####       ####  #l#  ######  #####
  #################################################################)

-- 
Yusuke Endoh <[email protected]>
=end

----------------------------------------
Feature #6265: Remove 'useless' 'concatenation' syntax
https://bugs.ruby-lang.org/issues/6265#change-25734

Author: rosenfeld (Rodrigo Rosenfeld Rosas)
Status: Assigned
Priority: Normal
Assignee: mame (Yusuke Endoh)
Category: 
Target version: 3.0


What is wrong with this code:

some_method 'argument1', 'argument2' 'argument3'

Yes, the missing colon, but it is not always easy to notice that...

What is this ('concatenation' 'syntax') useful for?

Why writing ('some ' 'concatenation') instead of 'some concatenation'?

A missing colon between string arguments can lead to some bugs that may be hard to find, specially if the arguments are optional.

And I can't see any useful case where this allowed syntax for concatenation would help.


-- 
http://bugs.ruby-lang.org/

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