Common lib/types constructs

Support dry-types
1

Personally I love dry-types and the composition it allows.
Our lib/types.rb keeps growing and I wonder what kind of “common types” people build.
I was even considering building a contrib package with some of those “common” utilities.
Some features are not fully documented in the website like >>, >, & but I find them very eloquent.

Lately I’ve been playing with the >> composition.

module Types
  Type = Types.Instance(Dry::Types::Type)
  Sum = Types.Instance(Dry::Types::Sum)
  Undefined = Dry::Types::Undefined

  SquishedString = Types::Coercible::String >> :squish.to_proc
  CapitalizedString = SquishedString >> :capitalize.to_proc
  LowercaseString = SquishedString >> :downcase.to_proc
end

Mostly I wanted to create an utility belt for our internal typechecks with some common tools and coercions so the mental gymnastics are less convoluted. We do have constructs like UniqueArray but I wonder what people create out there and if it’d make sense to put something together

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