Bug #14110: Ruby 2.5.0.dev (from trunk) still doesn't support zero unicode codepoints

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.5.0dev (2017-11-14 trunk 60757) [x86_64-darwin17]
• Backport: 2.3: UNKNOWN, 2.4: UNKNOWN

[ibylich (Ilya Bylich)]

Hi,

This commit - https://github.com/ruby/ruby/commit/7e8b910 - according to its commit message should allow zero unicode codepoints, i.e.

$ cat test.rb
p "\u{}"

$ ./ruby -v
ruby 2.5.0dev (2017-11-14 trunk 60757) [x86_64-darwin17]

$ ./ruby test.rb
test.rb:1: invalid Unicode escape
p "\u{}"
      ^

Shouldn't it be supported now? Because the test that was removed (that zero codepoints are not supported) is still passing.
Thanks.

[ibylich (Ilya Bylich)]

ibylich (Ilya Bylich) wrote:

Hi,

This commit - https://github.com/ruby/ruby/commit/7e8b910 - according to its commit message should allow zero unicode codepoints, i.e.

$ cat test.rb
p "\u{}"

$ ./ruby -v
ruby 2.5.0dev (2017-11-14 trunk 60757) [x86_64-darwin17]

$ ./ruby test.rb
test.rb:1: invalid Unicode escape
p "\u{}"
      ^

Shouldn't it be supported now? Because the test that was removed (that zero codepoints are not supported) is still passing.
Thanks.

Sorry, I've missed that it has been already fixed in https://github.com/ruby/ruby/commit/50702d16ab5862413351520b65da820194dbf8d7.
Is it going to be backported to 2.4?

[duerst (Martin Dürst)]

• Status changed from Open to Closed

My understanding is that bugs get backported, but features don't.

While I think allowing \u{} can be convenient in some cases, I don't think it was part of the original design, and so I would think about it as a feature.