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October 19, 2019 05:20
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module Hoge | |
class ArrayBase | |
class << self | |
attr_accessor :type | |
end | |
def type | |
self.class.type | |
end | |
def initialize(values = []) | |
@values = values.map { |v| type.new(v) } | |
end | |
def values | |
@values | |
end | |
def values=(new_values) | |
new_values.map { |v| type.new(v) } | |
end | |
end | |
def Array(type) | |
klass = Class.new(Hoge::ArrayBase) | |
klass.type = type | |
klass | |
end | |
module_function :Array | |
class Foo | |
attr_reader :value | |
def initialize(value) | |
@value = value | |
end | |
def to_s | |
"Foo(v=#{value})" | |
end | |
end | |
class Bar | |
attr_reader :value | |
def initialize(value) | |
@value = value | |
end | |
def to_s | |
"Bar(v=#{value})" | |
end | |
end | |
end | |
puts Hoge::Array(Hoge::Foo).new(%w(1 2 3)).values | |
puts Hoge::Array(Hoge::Bar).new(%w(1 2 3)).values |
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