TypeConstraints

Usage

require "type_constraints"

TypeConstraints.setup do
  type :Array do
    constraint -> v { v.kind_of?(Array) }
  end
  subtype :ArrayOfString, :Array do
    constraint -> v { v.all?() {|v| v.kind_of?(String) } }
  end
  subtype :ArrayOfHisa, :ArrayOfString do
    constraint -> v { v.all?() {|v| v === "5518" } }
  end
end


puts "testing Array"
p TypeConstraints.check?(:Array, []) #=> true
p TypeConstraints.check?(:Array, {}) #=> false

puts "testing ArrayOfString"
p TypeConstraints.check?(:ArrayOfString, ["1000", "2000"]) #=> true
p TypeConstraints.check?(:ArrayOfString, [1000, 2000])     #=> false

puts "testing ArrayOfHisa"
p TypeConstraints.check?(:ArrayOfHisa, ["5518"]) #=> true
p TypeConstraints.check?(:ArrayOfHisa, ["hisa"]) #=> false
p TypeConstraints.check?(:ArrayOfHisa, [5518])   #=> false

Installation

Add this line to your application's Gemfile:

gem 'type_constraints'

And then execute:

$ bundle

Or install it yourself as:

$ gem install type_constraints

Contributing

1. Fork it ( https://github.com/[my-github-username]/type_constraints/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request