parse_GEM

# File lib/rubygems/request_set/lockfile/parser.rb, line 110
  def parse_GEM # :nodoc:
    sources = []

    while [:entry, 'remote'] == peek.first(2) do
      get :entry, 'remote'
      data = get(:text).value
      skip :newline

      sources << Gem::Source.new(data)
    end

    sources << Gem::Source.new(Gem::DEFAULT_HOST) if sources.empty?

    get :entry, 'specs'

    skip :newline

    set = Gem::Resolver::LockSet.new sources
    last_specs = nil

    while not @tokens.empty? and :text == peek.type do
      token = get :text
      name = token.value
      column = token.column

      case peek[0]
      when :newline then
        last_specs.each do |spec|
          spec.add_dependency Gem::Dependency.new name if column == 6
        end
      when :l_paren then
        get :l_paren

        token = get [:text, :requirement]
        type = token.type
        data = token.value

        if type == :text and column == 4 then
          version, platform = data.split '-', 2

          platform =
            platform ? Gem::Platform.new(platform) : Gem::Platform::RUBY

          last_specs = set.add name, version, platform
        else
          dependency = parse_dependency name, data

          last_specs.each do |spec|
            spec.add_dependency dependency
          end
        end

        get :r_paren
      else
        raise "BUG: unknown token #{peek}"
      end

      skip :newline
    end

    @set.sets << set
  end