Class RDoc::Parser::Ruby

# File lib/rdoc/parser/ruby.rb, line 1480
  def add_token_listener(obj)
    @token_listeners ||= []
    @token_listeners << obj
  end

# File lib/rdoc/parser/ruby.rb, line 1488
  def collect_first_comment
    skip_tkspace
    res = ''
    first_line = true

    tk = get_tk

    while TkCOMMENT === tk
      if first_line and tk.text =~ /\A#!/ then
        skip_tkspace
        tk = get_tk
      elsif first_line and tk.text =~ /\A#\s*-\*-/ then
        first_line = false
        skip_tkspace
        tk = get_tk
      else
        first_line = false
        res << tk.text << "\n"
        tk = get_tk

        if TkNL === tk then
          skip_tkspace false
          tk = get_tk
        end
      end
    end

    unget_tk tk

    res
  end

# File lib/rdoc/parser/ruby.rb, line 1520
  def error(msg)
    msg = make_message msg
    $stderr.puts msg
    exit(1)
  end

# File lib/rdoc/parser/ruby.rb, line 1530
  def extract_call_seq(comment, meth)
    if comment.sub!(/:?call-seq:(.*?)^\s*\#?\s*$/m, '') then
      seq = $1
      seq.gsub!(/^\s*\#\s*/, '')
      meth.call_seq = seq
    end

    meth
  end

# File lib/rdoc/parser/ruby.rb, line 1540
  def get_bool
    skip_tkspace
    tk = get_tk
    case tk
    when TkTRUE
      true
    when TkFALSE, TkNIL
      false
    else
      unget_tk tk
      true
    end
  end

# File lib/rdoc/parser/ruby.rb, line 1558
  def get_class_or_module(container)
    skip_tkspace
    name_t = get_tk

    # class ::A -> A is in the top level
    if TkCOLON2 === name_t then
      name_t = get_tk
      container = @top_level
    end

    skip_tkspace(false)

    while TkCOLON2 === peek_tk do
      prev_container = container
      container = container.find_module_named(name_t.name)
      if !container
#          warn("Couldn't find module #{name_t.name}")
        container = prev_container.add_module RDoc::NormalModule, name_t.name
      end
      get_tk
      name_t = get_tk
    end
    skip_tkspace(false)
    return [container, name_t]
  end

# File lib/rdoc/parser/ruby.rb, line 1587
  def get_class_specification
    tk = get_tk
    return "self" if TkSELF === tk

    res = ""
    while TkCOLON2 === tk or TkCOLON3 === tk or TkCONSTANT === tk do
      res += tk.text
      tk = get_tk
    end

    unget_tk(tk)
    skip_tkspace(false)

    get_tkread # empty out read buffer

    tk = get_tk

    case tk
    when TkNL, TkCOMMENT, TkSEMICOLON then
      unget_tk(tk)
      return res
    end

    res += parse_call_parameters(tk)
    res
  end

# File lib/rdoc/parser/ruby.rb, line 1618
  def get_constant
    res = ""
    skip_tkspace(false)
    tk = get_tk

    while TkCOLON2 === tk or TkCOLON3 === tk or TkCONSTANT === tk do
      res += tk.text
      tk = get_tk
    end

#      if res.empty?
#        warn("Unexpected token #{tk} in constant")
#      end
    unget_tk(tk)
    res
  end

# File lib/rdoc/parser/ruby.rb, line 1638
  def get_constant_with_optional_parens
    skip_tkspace(false)
    nest = 0
    while TkLPAREN === (tk = peek_tk) or TkfLPAREN === tk do
      get_tk
      skip_tkspace(true)
      nest += 1
    end

    name = get_constant

    while nest > 0
      skip_tkspace(true)
      tk = get_tk
      nest -= 1 if TkRPAREN === tk
    end
    name
  end

# File lib/rdoc/parser/ruby.rb, line 1657
  def get_symbol_or_name
    tk = get_tk
    case tk
    when  TkSYMBOL
      tk.text.sub(/^:/, '')
    when TkId, TkOp
      tk.name
    when TkSTRING
      tk.text
    else
      raise "Name or symbol expected (got #{tk})"
    end
  end

# File lib/rdoc/parser/ruby.rb, line 1671
  def get_tk
    tk = nil
    if @tokens.empty?
      tk = @scanner.token
      @read.push @scanner.get_read
      puts "get_tk1 => #{tk.inspect}" if $TOKEN_DEBUG
    else
      @read.push @unget_read.shift
      tk = @tokens.shift
      puts "get_tk2 => #{tk.inspect}" if $TOKEN_DEBUG
    end

    if TkSYMBEG === tk then
      set_token_position(tk.line_no, tk.char_no)
      tk1 = get_tk
      if TkId === tk1 or TkOp === tk1 or TkSTRING === tk1 then
        if tk1.respond_to?(:name)
          tk = Token(TkSYMBOL).set_text(":" + tk1.name)
        else
          tk = Token(TkSYMBOL).set_text(":" + tk1.text)
        end
        # remove the identifier we just read (we're about to
        # replace it with a symbol)
        @token_listeners.each do |obj|
          obj.pop_token
        end if @token_listeners
      else
        warn("':' not followed by identifier or operator")
        tk = tk1
      end
    end

    # inform any listeners of our shiny new token
    @token_listeners.each do |obj|
      obj.add_token(tk)
    end if @token_listeners

    tk
  end

# File lib/rdoc/parser/ruby.rb, line 1711
  def get_tkread
    read = @read.join("")
    @read = []
    read
  end

# File lib/rdoc/parser/ruby.rb, line 1724
  def look_for_directives_in(context, comment)
    preprocess = RDoc::Markup::PreProcess.new(@file_name,
                                              @options.rdoc_include)

    preprocess.handle(comment) do |directive, param|
      case directive
      when 'enddoc' then
        throw :enddoc
      when 'main' then
        @options.main_page = param
        ''
      when 'method', 'singleton-method' then
        false # ignore
      when 'section' then
        context.set_current_section(param, comment)
        comment.replace ''
        break
      when 'startdoc' then
        context.start_doc
        context.force_documentation = true
        ''
      when 'stopdoc' then
        context.stop_doc
        ''
      when 'title' then
        @options.title = param
        ''
      else
        warn "Unrecognized directive '#{directive}'"
        false
      end
    end

    remove_private_comments(comment)
  end

# File lib/rdoc/parser/ruby.rb, line 1760
  def make_message(msg)
    prefix = "\n" + @file_name + ":"
    if @scanner
      prefix << "#{@scanner.line_no}:#{@scanner.char_no}: "
    end
    return prefix + msg
  end

# File lib/rdoc/parser/ruby.rb, line 1816
  def parse_alias(context, single, tk, comment)
    skip_tkspace
    if TkLPAREN === peek_tk then
      get_tk
      skip_tkspace
    end
    new_name = get_symbol_or_name
    @scanner.instance_eval{@lex_state = EXPR_FNAME}
    skip_tkspace
    if TkCOMMA === peek_tk then
      get_tk
      skip_tkspace
    end
    old_name = get_symbol_or_name

    al = RDoc::Alias.new get_tkread, old_name, new_name, comment
    read_documentation_modifiers al, RDoc::ATTR_MODIFIERS
    if al.document_self
      context.add_alias(al)
    end
  end

# File lib/rdoc/parser/ruby.rb, line 1768
  def parse_attr(context, single, tk, comment)
    args = parse_symbol_arg(1)
    if args.size > 0
      name = args[0]
      rw = "R"
      skip_tkspace(false)
      tk = get_tk
      if TkCOMMA === tk then
        rw = "RW" if get_bool
      else
        unget_tk tk
      end
      att = RDoc::Attr.new get_tkread, name, rw, comment
      read_documentation_modifiers att, RDoc::ATTR_MODIFIERS
      if att.document_self
        context.add_attribute(att)
      end
    else
      warn("'attr' ignored - looks like a variable")
    end
  end

# File lib/rdoc/parser/ruby.rb, line 1790
  def parse_attr_accessor(context, single, tk, comment)
    args = parse_symbol_arg
    read = get_tkread
    rw = "?"

    # If nodoc is given, don't document any of them

    tmp = RDoc::CodeObject.new
    read_documentation_modifiers tmp, RDoc::ATTR_MODIFIERS
    return unless tmp.document_self

    case tk.name
    when "attr_reader"   then rw = "R"
    when "attr_writer"   then rw = "W"
    when "attr_accessor" then rw = "RW"
    else
      rw = @options.extra_accessor_flags[tk.name]
      rw = '?' if rw.nil?
    end

    for name in args
      att = RDoc::Attr.new get_tkread, name, rw, comment
      context.add_attribute att
    end
  end

# File lib/rdoc/parser/ruby.rb, line 1838
  def parse_call_parameters(tk)
    end_token = case tk
                when TkLPAREN, TkfLPAREN
                  TkRPAREN
                when TkRPAREN
                  return ""
                else
                  TkNL
                end
    nest = 0

    loop do
        case tk
        when TkSEMICOLON
          break
        when TkLPAREN, TkfLPAREN
          nest += 1
        when end_token
          if end_token == TkRPAREN
            nest -= 1
            break if @scanner.lex_state == EXPR_END and nest <= 0
          else
            break unless @scanner.continue
          end
        when TkCOMMENT
          unget_tk(tk)
          break
        end
        tk = get_tk
    end
    res = get_tkread.tr("\n", " ").strip
    res = "" if res == ";"
    res
  end

# File lib/rdoc/parser/ruby.rb, line 1873
  def parse_class(container, single, tk, comment)
    container, name_t = get_class_or_module(container)

    case name_t
    when TkCONSTANT
      name = name_t.name
      superclass = "Object"

      if TkLT === peek_tk then
        get_tk
        skip_tkspace(true)
        superclass = get_class_specification
        superclass = "<unknown>" if superclass.empty?
      end

      cls_type = single == SINGLE ? RDoc::SingleClass : RDoc::NormalClass
      cls = container.add_class cls_type, name, superclass

      @stats.add_class cls

      read_documentation_modifiers cls, RDoc::CLASS_MODIFIERS
      cls.record_location @top_level

      parse_statements cls
      cls.comment = comment

    when TkLSHFT
      case name = get_class_specification
      when "self", container.name
        parse_statements(container, SINGLE)
      else
        other = RDoc::TopLevel.find_class_named(name)
        unless other
          #            other = @top_level.add_class(NormalClass, name, nil)
          #            other.record_location(@top_level)
          #            other.comment = comment
          other = RDoc::NormalClass.new "Dummy", nil
        end

        @stats.add_class other

        read_documentation_modifiers other, RDoc::CLASS_MODIFIERS
        parse_statements(other, SINGLE)
      end

    else
      warn("Expected class name or '<<'. Got #{name_t.class}: #{name_t.text.inspect}")
    end
  end

# File lib/rdoc/parser/ruby.rb, line 1977
  def parse_comment(container, tk, comment)
    line_no = tk.line_no
    column  = tk.char_no

    singleton = !!comment.sub!(/(^# +:?)(singleton-)(method:)/, '\1\3')

    if comment.sub!(/^# +:?method: *(\S*).*?\n/i, '') then
      name = $1 unless $1.empty?
    else
      return nil
    end

    meth = RDoc::GhostMethod.new get_tkread, name
    meth.singleton = singleton

    @stats.add_method meth

    meth.start_collecting_tokens
    indent = TkSPACE.new 1, 1
    indent.set_text " " * column

    position_comment = TkCOMMENT.new(line_no, 1, "# File #{@top_level.file_absolute_name}, line #{line_no}")
    meth.add_tokens [position_comment, NEWLINE_TOKEN, indent]

    meth.params = ''

    extract_call_seq comment, meth

    container.add_method meth if meth.document_self

    meth.comment = comment
  end

# File lib/rdoc/parser/ruby.rb, line 1923
  def parse_constant(container, single, tk, comment)
    name = tk.name
    skip_tkspace(false)
    eq_tk = get_tk

    unless TkASSIGN === eq_tk then
      unget_tk(eq_tk)
      return
    end


    nest = 0
    get_tkread

    tk = get_tk
    if TkGT === tk then
      unget_tk(tk)
      unget_tk(eq_tk)
      return
    end

    loop do
        case tk
        when TkSEMICOLON
          break
        when TkLPAREN, TkfLPAREN, TkLBRACE, TkLBRACK, TkDO
          nest += 1
        when TkRPAREN, TkRBRACE, TkRBRACK, TkEND
          nest -= 1
        when TkCOMMENT
          if nest <= 0 && @scanner.lex_state == EXPR_END
            unget_tk(tk)
            break
          end
        when TkNL
          if (nest <= 0) && ((@scanner.lex_state == EXPR_END) || (!@scanner.continue))
            unget_tk(tk)
            break
          end
        end
        tk = get_tk
    end

    res = get_tkread.tr("\n", " ").strip
    res = "" if res == ";"

    con = RDoc::Constant.new name, res, comment
    read_documentation_modifiers con, RDoc::CONSTANT_MODIFIERS

    if con.document_self
      container.add_constant(con)
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2010
  def parse_include(context, comment)
    loop do
      skip_tkspace_comment

      name = get_constant_with_optional_parens
      context.add_include RDoc::Include.new(name, comment) unless name.empty?

      return unless TkCOMMA === peek_tk
      get_tk
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2025
  def parse_meta_method(container, single, tk, comment)
    line_no = tk.line_no
    column  = tk.char_no

    start_collecting_tokens
    add_token tk
    add_token_listener self

    skip_tkspace false

    singleton = !!comment.sub!(/(^# +:?)(singleton-)(method:)/, '\1\3')

    if comment.sub!(/^# +:?method: *(\S*).*?\n/i, '') then
      name = $1 unless $1.empty?
    end

    if name.nil? then
      name_t = get_tk
      case name_t
      when TkSYMBOL then
        name = name_t.text[1..-1]
      when TkSTRING then
        name = name_t.text[1..-2]
      else
        warn "#{container.top_level.file_relative_name}:#{name_t.line_no} unknown name token #{name_t.inspect} for meta-method"
        name = 'unknown'
      end
    end

    meth = RDoc::MetaMethod.new get_tkread, name
    meth.singleton = singleton

    @stats.add_method meth

    remove_token_listener self

    meth.start_collecting_tokens
    indent = TkSPACE.new 1, 1
    indent.set_text " " * column

    position_comment = TkCOMMENT.new(line_no, 1, "# File #{@top_level.file_absolute_name}, line #{line_no}")
    meth.add_tokens [position_comment, NEWLINE_TOKEN, indent]
    meth.add_tokens @token_stream

    add_token_listener meth

    meth.params = ''

    extract_call_seq comment, meth

    container.add_method meth if meth.document_self

    last_tk = tk

    while tk = get_tk do
      case tk
      when TkSEMICOLON then
        break
      when TkNL then
        break unless last_tk and TkCOMMA === last_tk
      when TkSPACE then
        # expression continues
      else
        last_tk = tk
      end
    end

    remove_token_listener meth

    meth.comment = comment
  end

# File lib/rdoc/parser/ruby.rb, line 2100
  def parse_method(container, single, tk, comment)
    line_no = tk.line_no
    column  = tk.char_no

    start_collecting_tokens
    add_token(tk)
    add_token_listener(self)

    @scanner.instance_eval do @lex_state = EXPR_FNAME end

    skip_tkspace(false)
    name_t = get_tk
    back_tk = skip_tkspace
    meth = nil
    added_container = false

    dot = get_tk
    if TkDOT === dot or TkCOLON2 === dot then
      @scanner.instance_eval do @lex_state = EXPR_FNAME end
      skip_tkspace
      name_t2 = get_tk

      case name_t
      when TkSELF then
        name = name_t2.name
      when TkCONSTANT then
        name = name_t2.name
        prev_container = container
        container = container.find_module_named(name_t.name)
        unless container then
          added_container = true
          obj = name_t.name.split("::").inject(Object) do |state, item|
            state.const_get(item)
          end rescue nil

          type = obj.class == Class ? RDoc::NormalClass : RDoc::NormalModule

          unless [Class, Module].include?(obj.class) then
            warn("Couldn't find #{name_t.name}. Assuming it's a module")
          end

          if type == RDoc::NormalClass then
            container = prev_container.add_class(type, name_t.name, obj.superclass.name)
          else
            container = prev_container.add_module(type, name_t.name)
          end

          container.record_location @top_level
        end
      else
        # warn("Unexpected token '#{name_t2.inspect}'")
        # break
        skip_method(container)
        return
      end

      meth = RDoc::AnyMethod.new(get_tkread, name)
      meth.singleton = true
    else
      unget_tk dot
      back_tk.reverse_each do |token|
        unget_tk token
      end
      name = name_t.name

      meth = RDoc::AnyMethod.new get_tkread, name
      meth.singleton = (single == SINGLE)
    end

    @stats.add_method meth

    remove_token_listener self

    meth.start_collecting_tokens
    indent = TkSPACE.new 1, 1
    indent.set_text " " * column

    token = TkCOMMENT.new(line_no, 1, "# File #{@top_level.file_absolute_name}, line #{line_no}")
    meth.add_tokens [token, NEWLINE_TOKEN, indent]
    meth.add_tokens @token_stream

    add_token_listener meth

    @scanner.instance_eval do @continue = false end
    parse_method_parameters meth

    if meth.document_self then
      container.add_method meth
    elsif added_container then
      container.document_self = false
    end

    # Having now read the method parameters and documentation modifiers, we
    # now know whether we have to rename #initialize to ::new

    if name == "initialize" && !meth.singleton then
      if meth.dont_rename_initialize then
        meth.visibility = :protected
      else
        meth.singleton = true
        meth.name = "new"
        meth.visibility = :public
      end
    end

    parse_statements(container, single, meth)

    remove_token_listener(meth)

    extract_call_seq comment, meth

    meth.comment = comment
  end

# File lib/rdoc/parser/ruby.rb, line 2214
  def parse_method_or_yield_parameters(method = nil,
                                       modifiers = RDoc::METHOD_MODIFIERS)
    skip_tkspace(false)
    tk = get_tk

    # Little hack going on here. In the statement
    #  f = 2*(1+yield)
    # We see the RPAREN as the next token, so we need
    # to exit early. This still won't catch all cases
    # (such as "a = yield + 1"
    end_token = case tk
                when TkLPAREN, TkfLPAREN
                  TkRPAREN
                when TkRPAREN
                  return ""
                else
                  TkNL
                end
    nest = 0

    loop do
        case tk
        when TkSEMICOLON
          break
        when TkLBRACE
          nest += 1
        when TkRBRACE
          # we might have a.each {|i| yield i }
          unget_tk(tk) if nest.zero?
          nest -= 1
          break if nest <= 0
        when TkLPAREN, TkfLPAREN
          nest += 1
        when end_token
          if end_token == TkRPAREN
            nest -= 1
            break if @scanner.lex_state == EXPR_END and nest <= 0
          else
            break unless @scanner.continue
          end
        when method && method.block_params.nil? && TkCOMMENT
          unget_tk(tk)
          read_documentation_modifiers(method, modifiers)
        end
      tk = get_tk
    end
    res = get_tkread.tr("\n", " ").strip
    res = "" if res == ";"
    res
  end

# File lib/rdoc/parser/ruby.rb, line 2273
  def parse_method_parameters(method)
    res = parse_method_or_yield_parameters(method)
    res = "(" + res + ")" unless res[0] == ?(
    method.params = res unless method.params
    if method.block_params.nil?
      skip_tkspace(false)
      read_documentation_modifiers method, RDoc::METHOD_MODIFIERS
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2283
  def parse_module(container, single, tk, comment)
    container, name_t = get_class_or_module(container)

    name = name_t.name

    mod = container.add_module RDoc::NormalModule, name
    mod.record_location @top_level

    @stats.add_module mod

    read_documentation_modifiers mod, RDoc::CLASS_MODIFIERS
    parse_statements(mod)
    mod.comment = comment
  end

# File lib/rdoc/parser/ruby.rb, line 2298
  def parse_require(context, comment)
    skip_tkspace_comment
    tk = get_tk
    if TkLPAREN === tk then
      skip_tkspace_comment
      tk = get_tk
    end

    name = nil
    case tk
    when TkSTRING
      name = tk.text
      #    when TkCONSTANT, TkIDENTIFIER, TkIVAR, TkGVAR
      #      name = tk.name
    when TkDSTRING
      warn "Skipping require of dynamic string: #{tk.text}"
      #   else
      #     warn "'require' used as variable"
    end
    if name
      context.add_require RDoc::Require.new(name, comment)
    else
      unget_tk(tk)
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2324
  def parse_statements(container, single = NORMAL, current_method = nil,
                       comment = '')
    nest = 1
    save_visibility = container.visibility

    non_comment_seen = true

    while tk = get_tk do
      keep_comment = false

      non_comment_seen = true unless TkCOMMENT === tk

      case tk
      when TkNL then
        skip_tkspace true # Skip blanks and newlines
        tk = get_tk

        if TkCOMMENT === tk then
          if non_comment_seen then
            # Look for RDoc in a comment about to be thrown away
            parse_comment container, tk, comment unless comment.empty?

            comment = ''
            non_comment_seen = false
          end

          while TkCOMMENT === tk do
            comment << tk.text << "\n"
            tk = get_tk          # this is the newline
            skip_tkspace(false)  # leading spaces
            tk = get_tk
          end

          unless comment.empty? then
            look_for_directives_in container, comment

            if container.done_documenting then
              container.ongoing_visibility = save_visibility
            end
          end

          keep_comment = true
        else
          non_comment_seen = true
        end

        unget_tk tk
        keep_comment = true

      when TkCLASS then
        if container.document_children then
          parse_class container, single, tk, comment
        else
          nest += 1
        end

      when TkMODULE then
        if container.document_children then
          parse_module container, single, tk, comment
        else
          nest += 1
        end

      when TkDEF then
        if container.document_self then
          parse_method container, single, tk, comment
        else
          nest += 1
        end

      when TkCONSTANT then
        if container.document_self then
          parse_constant container, single, tk, comment
        end

      when TkALIAS then
        if container.document_self then
          parse_alias container, single, tk, comment
        end

      when TkYIELD then
        if current_method.nil? then
          warn "Warning: yield outside of method" if container.document_self
        else
          parse_yield container, single, tk, current_method
        end

      # Until and While can have a 'do', which shouldn't increase the nesting.
      # We can't solve the general case, but we can handle most occurrences by
      # ignoring a do at the end of a line.

      when  TkUNTIL, TkWHILE then
        nest += 1
        skip_optional_do_after_expression

      # 'for' is trickier
      when TkFOR then
        nest += 1
        skip_for_variable
        skip_optional_do_after_expression

      when TkCASE, TkDO, TkIF, TkUNLESS, TkBEGIN then
        nest += 1

      when TkIDENTIFIER then
        if nest == 1 and current_method.nil? then
          case tk.name
          when 'private', 'protected', 'public', 'private_class_method',
               'public_class_method', 'module_function' then
            parse_visibility container, single, tk
            keep_comment = true
          when 'attr' then
            parse_attr container, single, tk, comment
          when /^attr_(reader|writer|accessor)$/, @options.extra_accessors then
            parse_attr_accessor container, single, tk, comment
          when 'alias_method' then
            if container.document_self then
              parse_alias container, single, tk, comment
            end
          else
            if container.document_self and comment =~ /\A#\#$/ then
              parse_meta_method container, single, tk, comment
            end
          end
        end

        case tk.name
        when "require" then
          parse_require container, comment
        when "include" then
          parse_include container, comment
        end

      when TkEND then
        nest -= 1
        if nest == 0 then
          read_documentation_modifiers container, RDoc::CLASS_MODIFIERS
          container.ongoing_visibility = save_visibility
          return
        end

      end

      comment = '' unless keep_comment

      begin
        get_tkread
        skip_tkspace(false)
      end while peek_tk == TkNL
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2476
  def parse_symbol_arg(no = nil)
    args = []
    skip_tkspace_comment
    case tk = get_tk
    when TkLPAREN
      loop do
        skip_tkspace_comment
        if tk1 = parse_symbol_in_arg
          args.push tk1
          break if no and args.size >= no
        end

        skip_tkspace_comment
        case tk2 = get_tk
        when TkRPAREN
          break
        when TkCOMMA
        else
          warn("unexpected token: '#{tk2.inspect}'") if $DEBUG_RDOC
          break
        end
      end
    else
      unget_tk tk
      if tk = parse_symbol_in_arg
        args.push tk
        return args if no and args.size >= no
      end

      loop do
        skip_tkspace(false)

        tk1 = get_tk
        unless TkCOMMA === tk1 then
          unget_tk tk1
          break
        end

        skip_tkspace_comment
        if tk = parse_symbol_in_arg
          args.push tk
          break if no and args.size >= no
        end
      end
    end
    args
  end

# File lib/rdoc/parser/ruby.rb, line 2524
  def parse_symbol_in_arg
    case tk = get_tk
    when TkSYMBOL
      tk.text.sub(/^:/, '')
    when TkSTRING
      eval @read[-1]
    else
      warn("Expected symbol or string, got #{tk.inspect}") if $DEBUG_RDOC
      nil
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2536
  def parse_toplevel_statements(container)
    comment = collect_first_comment
    look_for_directives_in(container, comment)
    container.comment = comment unless comment.empty?
    parse_statements container, NORMAL, nil, comment
  end

# File lib/rdoc/parser/ruby.rb, line 2543
  def parse_visibility(container, single, tk)
    singleton = (single == SINGLE)

    vis_type = tk.name

    vis = case vis_type
          when 'private'   then :private
          when 'protected' then :protected
          when 'public'    then :public
          when 'private_class_method' then
            singleton = true
            :private
          when 'public_class_method' then
            singleton = true
            :public
          when 'module_function' then
            singleton = true
            :public
          else
            raise "Invalid visibility: #{tk.name}"
          end

    skip_tkspace_comment false

    case peek_tk
      # Ryan Davis suggested the extension to ignore modifiers, because he
      # often writes
      #
      #   protected unless $TESTING
      #
    when TkNL, TkUNLESS_MOD, TkIF_MOD, TkSEMICOLON then
      container.ongoing_visibility = vis
    else
      if vis_type == 'module_function' then
        args = parse_symbol_arg
        container.set_visibility_for args, :private, false

        module_functions = []

        container.methods_matching args do |m|
          s_m = m.dup
          s_m.singleton = true if RDoc::AnyMethod === s_m
          s_m.visibility = :public
          module_functions << s_m
        end

        module_functions.each do |s_m|
          case s_m
          when RDoc::AnyMethod then
            container.add_method s_m
          when RDoc::Attr then
            container.add_attribute s_m
          end
        end
      else
        args = parse_symbol_arg
        container.set_visibility_for args, vis, singleton
      end
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2608
  def parse_yield(context, single, tk, method)
    if method.block_params.nil?
      get_tkread
      @scanner.instance_eval{@continue = false}
      method.block_params = parse_yield_parameters
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2604
  def parse_yield_parameters
    parse_method_or_yield_parameters
  end

# File lib/rdoc/parser/ruby.rb, line 2616
  def peek_read
    @read.join('')
  end

# File lib/rdoc/parser/ruby.rb, line 2623
  def peek_tk
    unget_tk(tk = get_tk)
    tk
  end

# File lib/rdoc/parser/ruby.rb, line 2640
  def read_directive(allowed)
    tk = get_tk
    result = nil
    if TkCOMMENT === tk
      if tk.text =~ /\s*:?(\w+):\s*(.*)/
        directive = $1.downcase
        if allowed.include?(directive)
          result = [directive, $2]
        end
      end
    else
      unget_tk(tk)
    end
    result
  end

# File lib/rdoc/parser/ruby.rb, line 2656
  def read_documentation_modifiers(context, allow)
    dir = read_directive(allow)

    case dir[0]
    when "notnew", "not_new", "not-new" then
      context.dont_rename_initialize = true

    when "nodoc" then
      context.document_self = false
      if dir[1].downcase == "all"
        context.document_children = false
      end

    when "doc" then
      context.document_self = true
      context.force_documentation = true

    when "yield", "yields" then
      unless context.params.nil?
        context.params.sub!(/(,|)\s*&\w+/,'') # remove parameter &proc
      end

      context.block_params = dir[1]

    when "arg", "args" then
      context.params = dir[1]
    end if dir
  end

# File lib/rdoc/parser/ruby.rb, line 2685
  def remove_private_comments(comment)
    comment.gsub!(/^#--\n.*?^#\+\+/m, '')
    comment.sub!(/^#--\n.*/m, '')
  end

# File lib/rdoc/parser/ruby.rb, line 2690
  def remove_token_listener(obj)
    @token_listeners.delete(obj)
  end

# File lib/rdoc/parser/ruby.rb, line 2694
  def reset
    @tokens = []
    @unget_read = []
    @read = []
  end

# File lib/rdoc/parser/ruby.rb, line 2700
  def scan
    reset

    catch(:eof) do
      catch(:enddoc) do
        begin
          parse_toplevel_statements(@top_level)
        rescue Exception => e
          $stderr.puts "\n\nRDoc failure in \#{@file_name} at or around line \#{@scanner.line_no} column\n\#{@scanner.char_no}\n\nBefore reporting this, could you check that the file you're documenting\ncompiles cleanly--RDoc is not a full Ruby parser, and gets confused easily if\nfed invalid programs.\n\nThe internal error was:\n\n"

          e.set_backtrace(e.backtrace[0,4])
          raise
        end
      end
    end

    @top_level
  end

# File lib/rdoc/parser/ruby.rb, line 2774
  def skip_for_variable
    skip_tkspace(false)
    tk = get_tk
    skip_tkspace(false)
    tk = get_tk
    unget_tk(tk) unless TkIN === tk
  end

# File lib/rdoc/parser/ruby.rb, line 2782
  def skip_method(container)
    meth = RDoc::AnyMethod.new "", "anon"
    parse_method_parameters(meth)
    parse_statements(container, false, meth)
  end

# File lib/rdoc/parser/ruby.rb, line 2735
  def skip_optional_do_after_expression
    skip_tkspace(false)
    tk = get_tk
    case tk
    when TkLPAREN, TkfLPAREN
      end_token = TkRPAREN
    else
      end_token = TkNL
    end

    nest = 0
    @scanner.instance_eval{@continue = false}

    loop do
      case tk
      when TkSEMICOLON
        break
      when TkLPAREN, TkfLPAREN
        nest += 1
      when TkDO
        break if nest.zero?
      when end_token
        if end_token == TkRPAREN
          nest -= 1
          break if @scanner.lex_state == EXPR_END and nest.zero?
        else
          break unless @scanner.continue
        end
      end
      tk = get_tk
    end
    skip_tkspace(false)

    get_tk if TkDO === peek_tk
  end

# File lib/rdoc/parser/ruby.rb, line 2791
  def skip_tkspace(skip_nl = true)
    tokens = []

    while TkSPACE === (tk = get_tk) or (skip_nl and TkNL === tk) do
      tokens.push tk
    end

    unget_tk(tk)
    tokens
  end

# File lib/rdoc/parser/ruby.rb, line 2805
  def skip_tkspace_comment(skip_nl = true)
    loop do
      skip_tkspace(skip_nl)
      return unless TkCOMMENT === peek_tk
      get_tk
    end
  end

# File lib/rdoc/parser/ruby.rb, line 2813
  def unget_tk(tk)
    @tokens.unshift tk
    @unget_read.unshift @read.pop

    # Remove this token from any listeners
    @token_listeners.each do |obj|
      obj.pop_token
    end if @token_listeners
  end

# File lib/rdoc/parser/ruby.rb, line 2823
  def warn(msg)
    return if @options.quiet
    msg = make_message msg
    $stderr.puts msg
  end