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[PATCH] [Bug #21819] Data objects without members should also be frozen
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Notes:
Merged: https://github.com/ruby/ruby/pull/13603
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I noticed that `deconstruct` and `hash` don't have enough coverage.
The behavior of `hash` is documented so I copied it.
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Notes:
Merged: https://github.com/ruby/ruby/pull/7666
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Implements [Feature #19000]
This commit adds copy with changes functionality for `Data` objects
using a new method `Data#with`.
Since Data objects are immutable, the only way to change them is by
creating a copy. This PR adds a `with` method for `Data` class instances
that optionally takes keyword arguments.
If the `with` method is called with no arguments, the behaviour is the
same as the `Kernel#dup` method, i.e. a new shallow copy is created
with no field values changed.
However, if keyword arguments are supplied to the `with` method, then
the copy is created with the specified field values changed. For
example:
```ruby
Point = Data.define(:x, :y)
point = Point.new(x: 1, y: 2)
point.with(x: 3) # => #<data Point x: 3, y: 2>
```
Passing positional arguments to `with` or passing keyword arguments to
it that do not correspond to any of the members of the Data class will
raise an `ArgumentError`.
Co-authored-by: Alan Wu <XrXr@users.noreply.github.com>
Notes:
Merged-By: k0kubun <takashikkbn@gmail.com>
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Notes:
Merged: https://github.com/ruby/ruby/pull/6843
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Notes:
Merged: https://github.com/ruby/ruby/pull/6843
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Notes:
Merged: https://github.com/ruby/ruby/pull/6353
Merged-By: nobu <nobu@ruby-lang.org>
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