[ruby-core:75584] [Ruby trunk Feature#11925] Struct construction with kwargs

Issue #11925 has been updated by Shyouhei Urabe.


We looked at this issue in yesterday's developer meeting.  Nobody there was against the functionality -- but the name.  `create!` doesn't sound appropriate at all.  `create` also not that obvious for non-English speakers like us that it expects keywords.

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Feature #11925: Struct construction with kwargs
https://bugs.ruby-lang.org/issues/11925#change-58718

* Author: Ilya Vorontsov
* Status: Open
* Priority: Normal
* Assignee: 
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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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