[ruby-core:79181] [Ruby trunk Feature#11925] Struct construction with kwargs

Issue #11925 has been updated by Koichi Sasada.


Another idea is introducing another method to define own struct, such as `T = Struct.define(:a, :b); T.new(a: 1, b: 2)` and so on.
(just idea) Moreover we can extend Struct  with some properties, like: `Struct.define(:a, b: :read_only)`.

These ideas are provided by another person.

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Feature #11925: Struct construction with kwargs
https://bugs.ruby-lang.org/issues/11925#change-62605

* Author: Ilya Vorontsov
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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Propose to make Struct subclass constructors which accept keyword arguments. Not sure, if it's reasonable to allow `.new` accept kwargs, so may be should use different method named like `.create`:

```ruby
  Point = Struct.new(:x,:y, :color)
  pt_1 = Point.create(x: 1, y: 2) # => Point<x: 1, y: 2, color: nil>
  pt_2 = Point.create!(x: 1, y: 2) # => ArgumentError, color not specified.
```

It will greatly simplify work with big structures, especially in cases when struct layout changes and for cases when structure can have lots of non-significant values. It also allows simpler ways to use implement default values for struct members.



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