parse_constant

# File lib/rdoc/parser/ruby.rb, line 665
  def parse_constant container, tk, comment
    offset  = tk.seek
    line_no = tk.line_no

    name = tk.name
    skip_tkspace false

    return unless name =~ /^\w+$/

    eq_tk = get_tk

    unless TkASSIGN === eq_tk then
      unget_tk eq_tk
      return false
    end

    nest = 0
    get_tkread

    tk = get_tk

    if TkGT === tk then
      unget_tk tk
      unget_tk eq_tk
      return false
    end

    rhs_name = ''

    loop do
      case tk
      when TkSEMICOLON then
        break if nest <= 0
      when TkLPAREN, TkfLPAREN, TkLBRACE, TkfLBRACE, TkLBRACK, TkfLBRACK,
           TkDO, TkIF, TkUNLESS, TkCASE, TkDEF, TkBEGIN then
        nest += 1
      when TkRPAREN, TkRBRACE, TkRBRACK, TkEND then
        nest -= 1
      when TkCOMMENT then
        if nest <= 0 &&
           (@scanner.lex_state == EXPR_END || [email protected]) then
          unget_tk tk
          break
        end
      when TkCONSTANT then
        rhs_name << tk.name

        if nest <= 0 and TkNL === peek_tk then
          mod = if rhs_name =~ /^::/ then
                  RDoc::TopLevel.find_class_or_module rhs_name
                else
                  container.find_module_named rhs_name
                end

          container.add_module_alias mod, name, @top_level if mod
          break
        end
      when TkNL then
        if nest <= 0 &&
           (@scanner.lex_state == EXPR_END || [email protected]) then
          unget_tk tk
          break
        end
      when TkCOLON2, TkCOLON3 then
        rhs_name << '::'
      when nil then
        break
      end
      tk = get_tk
    end

    res = get_tkread.gsub(/^[ \t]+/, '').strip
    res = "" if res == ";"

    con = RDoc::Constant.new name, res, comment
    con.record_location @top_level
    con.offset = offset
    con.line   = line_no
    read_documentation_modifiers con, RDoc::CONSTANT_MODIFIERS

    @stats.add_constant con
    container.add_constant con
    true
  end