From: "nobu (Nobuyoshi Nakada) via ruby-core" <ruby-core@...>
Date: 2025-03-18T08:40:02+00:00
Subject: [ruby-core:121397] [Ruby Feature#21190] Proposal for the Deconstruct Method in the MatchData Class

Issue #21190 has been updated by nobu (Nobuyoshi Nakada).


`Match#destruct` and `Match#destruct_keys` have been defined since ruby 3.2.
`Match#destruct` is an alias of `Match#captures` like @jeremyevans0 wrote, so your regexp match does not match 4-element pattern.

```ruby
result = /(\d{2})(\d{2})(\d{9})/.match("5586987654321")
p result.deconstruct                                    #=> ["55", "86", "987654321"]
p (result in [_, country_code, area_code, number])      #=> false
p (result in [country_code, area_code, number])         #=> true
p [country_code, area_code, number]                     #=> ["55", "86", "987654321"]
```

----------------------------------------
Feature #21190: Proposal for the Deconstruct Method in the MatchData Class
https://bugs.ruby-lang.org/issues/21190#change-112371

* Author: aristotelesbr (Arist�teles Costa)
* Status: Closed
----------------------------------------
## Context:

The MatchData class currently lacks the deconstruct method, which is necessary for extracting values from a string using pattern matching in Ruby.

## Current Extraction Method

Currently, extraction can be done as follows:


```rb
result = /(\d{2})(\d{2})(\d{9})/.match("5586987654321")

puts result[1] # => "55"
puts result[2] # => "86"
puts result[3] # => "987654321"

```


## Proposed Solution:

Implement the deconstruct method in the MatchData class to allow conversion of the MatchData object into an array, enabling deconstruction of its components.

```rb
class MatchData
  def deconstruct
    self.to_a
  end
end

result = /(\d{2})(\d{2})(\d{9})/.match("5586987654321")
result in [_ , country_code, area_code, number]

puts country_code  # => "55"
puts area_code     # => "86"
puts number        # => "987654321"
```



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