From: Run Paint Run Run <redmine@...>
Date: 2009-08-04T18:40:02+09:00
Subject: [ruby-core:24738] [Bug #1873] MatchData#[]: Omits All But Last Captures Corresponding to the Same Named Group

Issue #1873 has been updated by Run Paint Run Run.


> This request is in other words, enable capture history.

I'm not sure I understand. The example shows that the history is already captured. Both the #inspect output and #to_a shows that the data is already stored inside the MatchData object; it's just not accessible with the #[Symbol] accessor.

IOW:

  >> 'abc'.match(/(?<a>a)(?<a>b)(?<a>c)/)
  => #<MatchData "abc" a:"a" a:"b" a:"c">

Group 'a' is shown as having the values 'a', 'b', and 'c', but #[:a] only returns 'c':

  >> 'abc'.match(/(?<a>a)(?<a>b)(?<a>c)/)[:a]
  => "c"
  >> 'abc'.match(/(?<a>a)(?<a>b)(?<a>c)/).captures
  => ["a", "b", "c"]

This doesn't seem like a disabled function to me; just an assumption that each group name will only appear once.
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http://redmine.ruby-lang.org/issues/show/1873

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