module Guff
  class TemplateToken
    getter :type

    def initialize(@type : Symbol, @val : String)
    end

    def get(args : Hash(String, String))
      case @type
      when :key
        raise "missing key: #{@val}" unless args.has_key?(@val)
        args[@val]
      when :val
        @val
      else
        # never reached
        raise "unknown token type: #{@type}"
      end
    end
  end
end