アクセサ作る時に型制約っぽいの入れたい

勢いで作りました。

require 'scottie'
require 'type_constraints'

TypeConstraints.setup do
  subtype :NotNgWord, :String do
    constraint -> v { v !~ /悪/ }
  end
end

class Person
  has name: :NotNgWord, twitter_acount: :String
end

# ok
person = Person.new
person.name = "ひさいち"
person.twitter_acount = "hisaichi5518"

# throw exception
# person.name = "悪魔ちゃん"
# person.twitter_acount = :hisaichi5518

# ok
p person.name #=> "ひさいち"
p person.twitter_acount #=> "hisaichi5518"