class Gem::NameTuple

def self.from_list(list)
  list.map {|t| new(*t) }
end

def self.null
  new nil, Gem::Version.new(0), nil
end

def self.to_basic(list)
  list.map(&:to_a)
end

def <=>(other)
  [@name, @version, Gem::Platform.sort_priority(@platform)] <=>
    [other.name, other.version, Gem::Platform.sort_priority(other.platform)]
end

def ==(other)
  case other
  when self.class
    @name == other.name &&
      @version == other.version &&
      @platform == other.platform
  when Array
    to_a == other
  else
    false
  end
end

def full_name
  case @platform
  when nil, "", Gem::Platform::RUBY
    "#{@name}-#{@version}"
  else
    "#{@name}-#{@version}-#{@platform}"
  end
end

def hash
  to_a.hash
end

def initialize(name, version, platform=Gem::Platform::RUBY)
  @name = name
  @version = version
  platform &&= platform.to_s
  platform = Gem::Platform::RUBY if !platform || platform.empty?
  @platform = platform
end

def inspect # :nodoc:
  "#<Gem::NameTuple #{@name}, #{@version}, #{@platform}>"
end

def match_platform?
  Gem::Platform.match_gem? @platform, @name
end

def prerelease?
  @version.prerelease?
end

def spec_name
  "#{full_name}.gemspec"
end

def to_a
  [@name, @version, @platform]
end