From: rr.rosas@...
Date: 2014-07-31T12:15:45+00:00
Subject: [ruby-core:64139] [ruby-trunk - Feature #6265] Remove 'useless'	'concatenation' syntax

Issue #6265 has been updated by Rodrigo Rosenfeld Rosas.


I said "useless" in the sense that you can achieve the same using "+" and it makes it easy to introduce common bugs in case you forget a comma between two strings when calling a method and this has happened already in real code, including the Rails source code despite the test suite.

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Feature #6265: Remove 'useless' 'concatenation' syntax
https://bugs.ruby-lang.org/issues/6265#change-48147

* Author: Rodrigo Rosenfeld Rosas
* Status: Assigned
* Priority: Normal
* Assignee: Yui NARUSE
* Category: core
* Target version: next minor
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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.



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