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996b1bfa95
* lib/rubygems.rb, lib/rubygems/*, test/rubygems/*: Update rubygems-2.5.2.
It supports to enable frozen string literal and add `--norc` option for
disable to `.gemrc` configuration.
See 2.5.2 release notes for other fixes and enhancements.
a8aa3bac72/History.txt (L3)
* lib/rubygems/specification.rb: `coding` is affect only first line except
shebang.
* lib/rubygems/package.rb, lib/rubygems/package/*: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@56003 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
37 lines
584 B
Ruby
37 lines
584 B
Ruby
# frozen_string_literal: true
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module Gem
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class List
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include Enumerable
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attr_accessor :value, :tail
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def initialize(value = nil, tail = nil)
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@value = value
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@tail = tail
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end
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def each
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n = self
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while n
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yield n.value
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n = n.tail
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end
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end
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def to_a
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super.reverse
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end
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def prepend(value)
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List.new value, self
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end
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def pretty_print q # :nodoc:
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q.pp to_a
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end
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def self.prepend(list, value)
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return List.new(value) unless list
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List.new value, list
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end
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end
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end
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