[ruby-core:77199] [Ruby trunk Feature#12700][Rejected] regexg heredoc support
From:
matz@...
Date:
2016-09-07 08:47:25 UTC
List:
ruby-core #77199
Issue #12700 has been updated by Yukihiro Matsumoto.
Status changed from Open to Rejected
Use `%r`.
Matz.
----------------------------------------
Feature #12700: regexg heredoc support
https://bugs.ruby-lang.org/issues/12700#change-60416
* Author: Allen Morris
* Status: Rejected
* Priority: Normal
* Assignee:
----------------------------------------
There is support for ', ", and ` heredocs, but there is no support for /.
Example code with new feature:
~~~ ruby
first = 'first'
orig = /#{first}
match\s # match
this # match this
/x
right = <</REGEXP/x
#{first}
match\s # match
this # match this
REGEXP
raise unless orig == right
~~~
There is no straight forward way to replace a regexp heredoc as a double quote heredoc requires that '\\s' be escaped.
As shown in the code below you can't use the string heredoc to directly replace a regexp heredoc because of this need for extra escaping.
~~~ ruby
first = 'first'
orig = /#{first}
match\s # match
this # match this
/x
wrong = Regexp.new(<<REGEXP, Regexp::EXTENDED)
#{first}
match\s # match
this # match this
REGEXP
right = Regexp.new(<<REGEXP, Regexp::EXTENDED)
#{first}
match\\s # match
this # match this
REGEXP
raise unless orig != wrong
raise unless orig == right
~~~
---Files--------------------------------
regex_heredoc_patch (2.99 KB)
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