Class: RDoc::Parser::Ruby (Ruby 2.5.7)
Description: Class : RDoc::Parser::Ruby - Ruby 2.5.7

### Home Classes Methods

### In Files

- rdoc/parser/ruby.rb

### Parent

RDoc::Parser

### Methods

- ::new
- #collect_first_comment
- #error
- #get_bool
- #get_class_or_module
- #get_class_specification
- #get_constant
- #get_constant_with_optional_parens
- #get_symbol_or_name
- #look_for_directives_in
- #make_message
- #new_comment
- #parse_alias
- #parse_attr
- #parse_attr_accessor
- #parse_call_parameters
- #parse_class
- #parse_comment
- #parse_comment_tomdoc
- #parse_constant
- #parse_constant_visibility
- #parse_meta_attr
- #parse_meta_method
- #parse_method
- #parse_method_dummy
- #parse_method_or_yield_parameters
- #parse_method_parameters
- #parse_method_params_and_body
- #parse_module
- #parse_require
- #parse_rescue
- #parse_statements
- #parse_symbol_arg
- #parse_symbol_in_arg
- #parse_top_level_statements
- #parse_visibility
- #parse_yield
- #read_directive
- #read_documentation_modifiers
- #scan
- #skip_for_variable
- #skip_method
- #skip_optional_do_after_expression
- #skip_tkspace_comment
- #tk_nl?
- #warn

### Included Modules

- RDoc::TokenStream
- RDoc::Parser::RubyTools

### Class/Module Index

Quicksearch

- RDoc
- RDoc::Alias
- RDoc::AnonClass
- RDoc::AnyMethod
- RDoc::Attr
- RDoc::ClassModule
- RDoc::CodeObject
- RDoc::Comment
- RDoc::Constant
- RDoc::Context
- RDoc::Context::Section
- RDoc::CrossReference
- RDoc::ERBIO
- RDoc::ERBPartial
- RDoc::Encoding
- RDoc::Error
- RDoc::Extend
- RDoc::Generator
- RDoc::Generator::Darkfish
- RDoc::Generator::JsonIndex
- RDoc::Generator::Markup
- RDoc::Generator::POT
- RDoc::Generator::POT::MessageExtractor
- RDoc::Generator::POT::PO
- RDoc::Generator::POT::POEntry
- RDoc::Generator::RI
- RDoc::GhostMethod
- RDoc::I18n
- RDoc::I18n::Locale
- RDoc::I18n::Text
- RDoc::Include
- RDoc::Markdown
- RDoc::Markdown::Literals
- RDoc::Markup
- RDoc::Markup::AttrChanger
- RDoc::Markup::AttrSpan
- RDoc::Markup::AttributeManager
- RDoc::Markup::Attributes
- RDoc::Markup::BlankLine
- RDoc::Markup::BlockQuote
- RDoc::Markup::Document
- RDoc::Markup::Formatter
- RDoc::Markup::FormatterTestCase
- RDoc::Markup::HardBreak
- RDoc::Markup::Include
- RDoc::Markup::IndentedParagraph
- RDoc::Markup::List
- RDoc::Markup::ListItem
- RDoc::Markup::Paragraph
- RDoc::Markup::Parser
- RDoc::Markup::Parser::Error
- RDoc::Markup::Parser::ParseError
- RDoc::Markup::PreProcess
- RDoc::Markup::Raw
- RDoc::Markup::Rule
- RDoc::Markup::Special
- RDoc::Markup::TextFormatterTestCase
- RDoc::Markup::ToAnsi
- RDoc::Markup::ToBs
- RDoc::Markup::ToHtml
- RDoc::Markup::ToHtmlCrossref
- RDoc::Markup::ToHtmlSnippet
- RDoc::Markup::ToJoinedParagraph
- RDoc::Markup::ToLabel
- RDoc::Markup::ToMarkdown
- RDoc::Markup::ToRdoc
- RDoc::Markup::ToTableOfContents
- RDoc::Markup::ToTest
- RDoc::Markup::ToTtOnly
- RDoc::Markup::Verbatim
- RDoc::MetaMethod
- RDoc::MethodAttr
- RDoc::Mixin
- RDoc::NormalClass
- RDoc::NormalModule
- RDoc::Options
- RDoc::Parser
- RDoc::Parser::C
- RDoc::Parser::ChangeLog
- RDoc::Parser::Markdown
- RDoc::Parser::RD
- RDoc::Parser::Ruby
- RDoc::Parser::RubyTools
- RDoc::Parser::Simple
- RDoc::Parser::Text
- RDoc::RD
- RDoc::RD::BlockParser
- RDoc::RD::Inline
- RDoc::RD::InlineParser
- RDoc::RDoc
- RDoc::RI
- RDoc::RI::Driver
- RDoc::RI::Driver::Error
- RDoc::RI::Driver::NotFoundError
- RDoc::RI::Error
- RDoc::RI::Paths
- RDoc::RI::Task
- RDoc::Require
- RDoc::RipperStateLex
- RDoc::RipperStateLex::InnerStateLex
- RDoc::RubygemsHook
- RDoc::Servlet
- RDoc::SingleClass
- RDoc::Stats
- RDoc::Stats::Normal
- RDoc::Stats::Quiet
- RDoc::Stats::Verbose
- RDoc::Store
- RDoc::Store::Error
- RDoc::Store::MissingFileError
- RDoc::Task
- RDoc::TestCase
- RDoc::Text
- RDoc::TokenStream
- RDoc::TomDoc
- RDoc::TopLevel
- RDocTask

No matching classes.

# RDoc::Parser::Ruby

### Constants

NORMAL

  `RDoc::NormalClass` type

SINGLE

  `RDoc::SingleClass` type

### Public Class Methods

new(top_level, file_name, content, options, stats) click to toggle source

Creates a new `Ruby` parser.

                   # File rdoc/parser/ruby.rb, line 165
    def initialize(top_level, file_name, content, options, stats)
      super

      if /\t/ =~ content then
        tab_width = @options.tab_width
        content = content.split(/\n/).map do |line|
          1 while line.gsub!(/\t+/) {
            ' ' * (tab_width*$&.length - $`.length % tab_width)
          }  && $~
          line
        end.join("\n")
      end

      @size = 0
      @token_listeners = nil
      @scanner = RDoc::RipperStateLex.parse(content)
      @content = content
      @scanner_point = 0
      @prev_seek = nil
      @markup = @options.markup
      @track_visibility = :nodoc != @options.visibility
      @encoding = @options.encoding

      reset
    end

### Public Instance Methods

collect_first_comment() click to toggle source

Look for the first comment in a file that isn't a shebang line.

                   # File rdoc/parser/ruby.rb, line 241
    def collect_first_comment
      skip_tkspace
      comment = ''.dup
      comment = RDoc::Encoding.change_encoding comment, @encoding if @encoding
      first_line = true
      first_comment_tk_kind = nil

      tk = get_tk

      while tk && (:on_comment == tk[:kind] or :on_embdoc == tk[:kind])
        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
          break if first_comment_tk_kind and not first_comment_tk_kind === tk[:kind]
          first_comment_tk_kind = tk[:kind]

          first_line = false
          comment << tk[:text]
          tk = get_tk

          if :on_nl === tk then
            skip_tkspace false
            tk = get_tk
          end
        end
      end

      unget_tk tk

      new_comment comment
    end

error(msg) click to toggle source

Aborts with `msg`

                   # File rdoc/parser/ruby.rb, line 315
    def error(msg)
      msg = make_message msg

      abort msg
    end

get_bool() click to toggle source

Looks for a true or false token.

                   # File rdoc/parser/ruby.rb, line 324
    def get_bool
      skip_tkspace
      tk = get_tk
      if :on_kw == tk[:kind] && 'true' == tk[:text]
        true
      elsif :on_kw == tk[:kind] && ('false' == tk[:text] || 'nil' == tk[:text])
        false
      else
        unget_tk tk
        true
      end
    end

get_class_or_module(container, ignore_constants = false) click to toggle source

Look for the name of a class of module (optionally with a leading

  or

with

  separated named) and return the ultimate name, the associated

container, and the given name (with the ::).

                   # File rdoc/parser/ruby.rb, line 342
    def get_class_or_module container, ignore_constants = false
      skip_tkspace
      name_t = get_tk
      given_name = ''.dup

      # class ::A -> A is in the top level
      if :on_op == name_t[:kind] and '::' == name_t[:text] then # bug
        name_t = get_tk
        container = @top_level
        given_name << '::'
      end

      skip_tkspace false
      given_name << name_t[:text]

      is_self = name_t[:kind] == :on_op && name_t[:text] == '<<'
      while !is_self && (tk = peek_tk) and :on_op == tk[:kind] and '::' == tk[:text] do
        prev_container = container
        container = container.find_module_named name_t[:text]
        container ||=
          if ignore_constants then
            RDoc::Context.new
          else
            c = prev_container.add_module RDoc::NormalModule, name_t[:text]
            c.ignore unless prev_container.document_children
            @top_level.add_to_classes_or_modules c
            c
          end

        record_location container

        get_tk
        skip_tkspace false
        name_t = get_tk
        unless :on_const == name_t[:kind] || :on_ident == name_t[:kind]
          raise RDoc::Error, "Invalid class or module definition: #{given_name}"
        end
        if prev_container == container and !ignore_constants
          given_name = name_t[:text]
        else
          given_name << '::' + name_t[:text]
        end
      end

      skip_tkspace false

      return [container, name_t, given_name]
    end

get_class_specification() click to toggle source

Return a superclass, which can be either a constant of an expression

                   # File rdoc/parser/ruby.rb, line 394
    def get_class_specification
      tk = peek_tk
      if tk.nil?
        return ''
      elsif :on_kw == tk[:kind] && 'self' == tk[:text]
        return 'self'
      elsif :on_gvar == tk[:kind]
        return ''
      end

      res = get_constant

      skip_tkspace false

      get_tkread # empty out read buffer

      tk = get_tk
      return res unless tk

      case tk[:kind]
      when :on_nl, :on_comment, :on_embdoc, :on_semicolon then
        unget_tk(tk)
        return res
      end

      res += parse_call_parameters(tk)
      res
    end

get_constant() click to toggle source

Parse a constant, which might be qualified by one or more class or module names

                   # File rdoc/parser/ruby.rb, line 427
    def get_constant
      res = ""
      skip_tkspace false
      tk = get_tk

      while tk && ((:on_op == tk[:kind] && '::' == tk[:text]) || :on_const == tk[:kind]) do
        res += tk[:text]
        tk = get_tk
      end

      unget_tk(tk)
      res
    end

get_constant_with_optional_parens() click to toggle source

Get a constant that may be surrounded by parens

                   # File rdoc/parser/ruby.rb, line 444
    def get_constant_with_optional_parens
      skip_tkspace false

      nest = 0

      while :on_lparen == (tk = peek_tk)[:kind] do
        get_tk
        skip_tkspace
        nest += 1
      end

      name = get_constant

      while nest > 0
        skip_tkspace
        tk = get_tk
        nest -= 1 if :on_rparen == tk[:kind]
      end

      name
    end

get_symbol_or_name() click to toggle source

Extracts a name or symbol from the token stream.

                   # File rdoc/parser/ruby.rb, line 537
    def get_symbol_or_name
      tk = get_tk
      case tk[:kind]
      when :on_symbol then
        text = tk[:text].sub(/^:/, '')

        next_tk = peek_tk
        if next_tk && :on_op == next_tk[:kind] && '=' == next_tk[:text] then
          get_tk
          text << '='
        end

        text
      when :on_ident, :on_const, :on_gvar, :on_cvar, :on_ivar, :on_op, :on_kw then
        tk[:text]
      when :on_tstring, :on_dstring then
        tk[:text][1..-2]
      else
        raise RDoc::Error, "Name or symbol expected (got #{tk})"
      end
    end

look_for_directives_in(container, comment) click to toggle source

Look for directives in a normal comment block:

    # :stopdoc:
    # Don't display comment from this point forward

This routine modifies its `comment` parameter.

                   # File rdoc/parser/ruby.rb, line 577
    def look_for_directives_in container, comment
      @preprocess.handle comment, container do |directive, param|
        case directive
        when 'method', 'singleton-method',
             'attr', 'attr_accessor', 'attr_reader', 'attr_writer' then
          false # handled elsewhere
        when 'section' then
          break unless container.kind_of?(RDoc::Context)
          container.set_current_section param, comment.dup
          comment.text = ''
          break
        end
      end

      comment.remove_private
    end

make_message(message) click to toggle source

Adds useful info about the parser to `message`

                   # File rdoc/parser/ruby.rb, line 597
    def make_message message
      prefix = "#{@file_name}:".dup

      tk = peek_tk
      prefix << "#{tk[:line_no]}:#{tk[:char_no]}:" if tk

      "#{prefix} #{message}"
    end

new_comment(comment) click to toggle source

Creates a comment with the correct format

                   # File rdoc/parser/ruby.rb, line 609
    def new_comment comment
      c = RDoc::Comment.new comment, @top_level
      c.format = @markup
      c
    end

parse_alias(context, single, tk, comment) click to toggle source

Parses an `alias` in `context` with `comment`

                   # File rdoc/parser/ruby.rb, line 677
    def parse_alias(context, single, tk, comment)
      line_no = tk[:line_no]

      skip_tkspace

      if :on_lparen === peek_tk[:kind] then
        get_tk
        skip_tkspace
      end

      new_name = get_symbol_or_name

      skip_tkspace
      if :on_comma === peek_tk[:kind] then
        get_tk
        skip_tkspace
      end

      begin
        old_name = get_symbol_or_name
      rescue RDoc::Error
        return
      end

      al = RDoc::Alias.new(get_tkread, old_name, new_name, comment,
                           single == SINGLE)
      record_location al
      al.line   = line_no

      read_documentation_modifiers al, RDoc::ATTR_MODIFIERS
      context.add_alias al
      @stats.add_alias al

      al
    end

parse_attr(context, single, tk, comment) click to toggle source

Creates an `RDoc::Attr` for the name following `tk`, setting the comment to `comment`.

                   # File rdoc/parser/ruby.rb, line 619
    def parse_attr(context, single, tk, comment)
      line_no = tk[:line_no]

      args = parse_symbol_arg 1
      if args.size > 0 then
        name = args[0]
        rw = "R"
        skip_tkspace false
        tk = get_tk

        if :on_comma == tk[:kind] then
          rw = "RW" if get_bool
        else
          unget_tk tk
        end

        att = create_attr context, single, name, rw, comment
        att.line   = line_no

        read_documentation_modifiers att, RDoc::ATTR_MODIFIERS
      else
        warn "'attr' ignored - looks like a variable"
      end
    end

parse_attr_accessor(context, single, tk, comment) click to toggle source

Creates an `RDoc::Attr` for each attribute listed after `tk`, setting the comment for each to `comment`.

                   # File rdoc/parser/ruby.rb, line 648
    def parse_attr_accessor(context, single, tk, comment)
      line_no = tk[:line_no]

      args = parse_symbol_arg
      rw = "?"

      tmp = RDoc::CodeObject.new
      read_documentation_modifiers tmp, RDoc::ATTR_MODIFIERS
      # TODO In most other places we let the context keep track of document_self
      # and add found items appropriately but here we do not.  I'm not sure why.
      return if @track_visibility and not tmp.document_self

      case tk[:text]
      when "attr_reader"   then rw = "R"
      when "attr_writer"   then rw = "W"
      when "attr_accessor" then rw = "RW"
      else
        rw = '?'
      end

      for name in args
        att = create_attr context, single, name, rw, comment
        att.line   = line_no
      end
    end

parse_call_parameters(tk) click to toggle source

Extracts call parameters from the token stream.

                   # File rdoc/parser/ruby.rb, line 716
    def parse_call_parameters(tk)
      end_token = case tk[:kind]
                  when :on_lparen
                    :on_rparen
                  when :on_rparen
                    return ""
                  else
                    :on_nl
                  end
      nest = 0

      loop do
        break if tk.nil?
        case tk[:kind]
        when :on_semicolon
          break
        when :on_lparen
          nest += 1
        when end_token
          if end_token == :on_rparen
            nest -= 1
            break if RDoc::RipperStateLex.end?(tk) and nest <= 0
          else
            break if RDoc::RipperStateLex.end?(tk)
          end
        when :on_comment, :on_embdoc
          unget_tk(tk)
          break
        when :on_op
          if tk[:text] =~ /^(.{1,2})?=$/
            unget_tk(tk)
            break
          end
        end
        tk = get_tk
      end

      get_tkread_clean "\n", " "
    end

parse_class(container, single, tk, comment) click to toggle source

Parses a class in `context` with `comment`

                   # File rdoc/parser/ruby.rb, line 759
    def parse_class container, single, tk, comment
      line_no = tk[:line_no]

      declaration_context = container
      container, name_t, given_name = get_class_or_module container

      if name_t[:kind] == :on_const
        cls = parse_class_regular container, declaration_context, single,
          name_t, given_name, comment
      elsif name_t[:kind] == :on_op && name_t[:text] == '<<'
        case name = get_class_specification
        when 'self', container.name
          read_documentation_modifiers cls, RDoc::CLASS_MODIFIERS
          parse_statements container, SINGLE
          return # don't update line
        else
          cls = parse_class_singleton container, name, comment
        end
      else
        warn "Expected class name or '<<'. Got #{name_t[:kind]}: #{name_t[:text].inspect}"
        return
      end

      cls.line   = line_no

      # after end modifiers
      read_documentation_modifiers cls, RDoc::CLASS_MODIFIERS

      cls
    end

parse_comment(container, tk, comment) click to toggle source

Generates an RDoc::Method or `RDoc::Attr` from `comment` by looking for :method: or :attr: directives in `comment`.

                   # File rdoc/parser/ruby.rb, line 989
    def parse_comment container, tk, comment
      return parse_comment_tomdoc container, tk, comment if @markup == 'tomdoc'
      column  = tk[:char_no]
      line_no = tk[:line_no]

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

      co =
        if (comment.text = comment.text.sub(/^# +:?method: *(\S*).*?\n/i, '')) && !!$~ then
          parse_comment_ghost container, comment.text, $1, column, line_no, comment
        elsif (comment.text = comment.text.sub(/# +:?(attr(_reader|_writer|_accessor)?): *(\S*).*?\n/i, '')) && !!$~ then
          parse_comment_attr container, $1, $3, comment
        end

      if co then
        co.singleton = singleton
        co.line      = line_no
      end

      true
    end

parse_comment_tomdoc(container, tk, comment) click to toggle source

Creates an RDoc::Method on `container` from `comment` if there is a Signature section in the comment

                   # File rdoc/parser/ruby.rb, line 1067
    def parse_comment_tomdoc container, tk, comment
      return unless signature = RDoc::TomDoc.signature(comment)
      column  = tk[:char_no]
      line_no = tk[:line_no]

      name, = signature.split %r%[ \(]%, 2

      meth = RDoc::GhostMethod.new get_tkread, name
      record_location meth
      meth.line      = line_no

      meth.start_collecting_tokens
      indent = { :line_no => 1, :char_no => 1, :kind => :on_sp, :text => ' ' * column }
      position_comment = { :line_no => line_no, :char_no => 1, :kind => :on_comment }
      position_comment[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
      newline = { :line_no => 0, :char_no => 0, :kind => :on_nl, :text => "\n" }
      meth.add_tokens [position_comment, newline, indent]

      meth.call_seq = signature

      comment.normalize

      return unless meth.name

      container.add_method meth

      meth.comment = comment

      @stats.add_method meth
    end

parse_constant(container, tk, comment, ignore_constants = false) click to toggle source

Parses a constant in `context` with `comment`. If `ignore_constants` is true, no found constants will be added to `RDoc`.

                   # File rdoc/parser/ruby.rb, line 872
    def parse_constant container, tk, comment, ignore_constants = false
      line_no = tk[:line_no]

      name = tk[:text]
      skip_tkspace false

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

      if :on_op == peek_tk[:kind] && '::' == peek_tk[:text] then
        unget_tk tk

        container, name_t, = get_class_or_module container, ignore_constants

        name = name_t[:text]
      end

      is_array_or_hash = false
      if peek_tk && :on_lbracket == peek_tk[:kind]
        get_tk
        nest = 1
        while bracket_tk = get_tk
          case bracket_tk[:kind]
          when :on_lbracket
            nest += 1
          when :on_rbracket
            nest -= 1
            break if nest == 0
          end
        end
        skip_tkspace false
        is_array_or_hash = true
      end

      unless peek_tk && :on_op == peek_tk[:kind] && '=' == peek_tk[:text] then
        return false
      end
      get_tk

      value = ''
      con = RDoc::Constant.new name, value, comment

      body = parse_constant_body container, con, is_array_or_hash

      return unless body

      con.value = body
      record_location con
      con.line   = line_no
      read_documentation_modifiers con, RDoc::CONSTANT_MODIFIERS

      return if is_array_or_hash

      @stats.add_constant con
      container.add_constant con

      true
    end

parse_constant_visibility(container, single, tk) click to toggle source

Parses a Module#private_constant or Module#public_constant call from `tk`.

                   # File rdoc/parser/ruby.rb, line 1963
    def parse_constant_visibility(container, single, tk)
      args = parse_symbol_arg
      case tk[:text]
      when 'private_constant'
        vis = :private
      when 'public_constant'
        vis = :public
      else
        raise RDoc::Error, 'Unreachable'
      end
      container.set_constant_visibility_for args, vis
    end

parse_meta_attr(context, single, tk, comment) click to toggle source

Parses a meta-programmed attribute and creates an `RDoc::Attr`.

To create foo and bar attributes on class C with comment “My attributes”:

    class C

      ##
      # :attr:
      #
      # My attributes

      my_attr :foo, :bar

    end

To create a foo attribute on class C with comment “My attribute”:

    class C

      ##
      # :attr: foo
      #
      # My attribute

      my_attr :foo, :bar

    end

                   # File rdoc/parser/ruby.rb, line 1188
    def parse_meta_attr(context, single, tk, comment)
      args = parse_symbol_arg
      rw = "?"

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

      tmp = RDoc::CodeObject.new
      read_documentation_modifiers tmp, RDoc::ATTR_MODIFIERS

      regexp = /^# +:?(attr(_reader|_writer|_accessor)?): *(\S*).*?\n/i
      if regexp =~ comment.text then
        comment.text = comment.text.sub(regexp, '')
        rw = case $1
             when 'attr_reader' then 'R'
             when 'attr_writer' then 'W'
             else 'RW'
             end
        name = $3 unless $3.empty?
      end

      if name then
        att = create_attr context, single, name, rw, comment
      else
        args.each do |attr_name|
          att = create_attr context, single, attr_name, rw, comment
        end
      end

      att
    end

parse_meta_method(container, single, tk, comment) click to toggle source

Parses a meta-programmed method

                   # File rdoc/parser/ruby.rb, line 1222
    def parse_meta_method(container, single, tk, comment)
      column  = tk[:char_no]
      line_no = tk[:line_no]

      start_collecting_tokens
      add_token tk
      add_token_listener self

      skip_tkspace false

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

      name = parse_meta_method_name comment, tk

      return unless name

      meth = RDoc::MetaMethod.new get_tkread, name
      record_location meth
      meth.line   = line_no
      meth.singleton = singleton

      remove_token_listener self

      meth.start_collecting_tokens
      indent = { :line_no => 1, :char_no => 1, :kind => :on_sp, :text => ' ' * column }
      position_comment = { :line_no => line_no, :char_no => 1, :kind => :on_comment }
      position_comment[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
      newline = { :line_no => 0, :char_no => 0, :kind => :on_nl, :text => "\n" }
      meth.add_tokens [position_comment, newline, indent]
      meth.add_tokens @token_stream

      parse_meta_method_params container, single, meth, tk, comment

      meth.comment = comment

      @stats.add_method meth

      meth
    end

parse_method(container, single, tk, comment) click to toggle source

Parses a normal method defined by `def`

                   # File rdoc/parser/ruby.rb, line 1324
    def parse_method(container, single, tk, comment)
      singleton = nil
      added_container = false
      name = nil
      column  = tk[:char_no]
      line_no = tk[:line_no]

      start_collecting_tokens
      add_token tk

      token_listener self do
        prev_container = container
        name, container, singleton = parse_method_name container
        added_container = container != prev_container
      end

      return unless name

      meth = RDoc::AnyMethod.new get_tkread, name
      look_for_directives_in meth, comment
      meth.singleton = single == SINGLE ? true : singleton

      record_location meth
      meth.line   = line_no

      meth.start_collecting_tokens
      indent = { :line_no => 1, :char_no => 1, :kind => :on_sp, :text => ' ' * column }
      token = { :line_no => line_no, :char_no => 1, :kind => :on_comment }
      token[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
      newline = { :line_no => 0, :char_no => 0, :kind => :on_nl, :text => "\n" }
      meth.add_tokens [token, newline, indent]
      meth.add_tokens @token_stream

      parse_method_params_and_body container, single, meth, added_container

      comment.normalize
      comment.extract_call_seq meth

      meth.comment = comment

      # after end modifiers
      read_documentation_modifiers meth, RDoc::METHOD_MODIFIERS

      @stats.add_method meth
    end

parse_method_dummy(container) click to toggle source

Parses a method that needs to be ignored.

                   # File rdoc/parser/ruby.rb, line 1403
    def parse_method_dummy container
      dummy = RDoc::Context.new
      dummy.parent = container
      dummy.store  = container.store
      skip_method dummy
    end

parse_method_or_yield_parameters(method = nil, modifiers = RDoc::METHOD_MODIFIERS) click to toggle source

Extracts `yield` parameters from `method`

                   # File rdoc/parser/ruby.rb, line 1505
    def parse_method_or_yield_parameters(method = nil,
                                         modifiers = RDoc::METHOD_MODIFIERS)
      skip_tkspace false
      tk = get_tk
      end_token = get_end_token tk
      return '' unless end_token

      nest = 0
      continue = false

      while tk != nil do
        case tk[:kind]
        when :on_semicolon then
          break if nest == 0
        when :on_lbrace then
          nest += 1
        when :on_rbrace then
          nest -= 1
          if nest <= 0
            # we might have a.each { |i| yield i }
            unget_tk(tk) if nest < 0
            break
          end
        when :on_lparen then
          nest += 1
        when end_token[:kind] then
          if end_token[:kind] == :on_rparen
            nest -= 1
            break if nest <= 0
          else
            break
          end
        when :on_rparen then
          nest -= 1
        when :on_comment, :on_embdoc then
          @read.pop
          if :on_nl == end_token[:kind] and "\n" == tk[:text][-1] and
            (!continue or (tk[:state] & RDoc::RipperStateLex::EXPR_LABEL) != 0) then
            if method && method.block_params.nil? then
              unget_tk tk
              read_documentation_modifiers method, modifiers
            end
            break if !continue and nest <= 0
          end
        when :on_comma then
          continue = true
        when :on_ident then
          continue = false if continue
        end
        tk = get_tk
      end

      get_tkread_clean(/\s+/, ' ')
    end

parse_method_parameters(method) click to toggle source

Capture the method's parameters. Along the way, look for a comment containing:

    # yields: ....

and add this as the block_params for the method

                   # File rdoc/parser/ruby.rb, line 1568
    def parse_method_parameters method
      res = parse_method_or_yield_parameters method

      res = "(#{res})" unless res =~ /\A\(/
      method.params = res unless method.params

      return if  method.block_params

      skip_tkspace false
      read_documentation_modifiers method, RDoc::METHOD_MODIFIERS
    end

parse_method_params_and_body(container, single, meth, added_container) click to toggle source

Parses the parameters and body of `meth`

                   # File rdoc/parser/ruby.rb, line 1373
    def parse_method_params_and_body container, single, meth, added_container
      token_listener meth do
        parse_method_parameters meth

        if meth.document_self or not @track_visibility 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 meth.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
      end
    end

parse_module(container, single, tk, comment) click to toggle source

Parses an `RDoc::NormalModule` in `container` with `comment`

                   # File rdoc/parser/ruby.rb, line 1583
    def parse_module container, single, tk, comment
      container, name_t, = get_class_or_module container

      name = name_t[:text]

      mod = container.add_module RDoc::NormalModule, name
      mod.ignore unless container.document_children
      record_location mod

      read_documentation_modifiers mod, RDoc::CLASS_MODIFIERS
      mod.add_comment comment, @top_level
      parse_statements mod

      # after end modifiers
      read_documentation_modifiers mod, RDoc::CLASS_MODIFIERS

      @stats.add_module mod
    end

parse_require(context, comment) click to toggle source

Parses an `RDoc::Require` in `context` containing `comment`

                   # File rdoc/parser/ruby.rb, line 1605
    def parse_require(context, comment)
      skip_tkspace_comment
      tk = get_tk

      if :on_lparen == tk[:kind] then
        skip_tkspace_comment
        tk = get_tk
      end

      name = tk[:text][1..-2] if :on_tstring == tk[:kind]

      if name then
        @top_level.add_require RDoc::Require.new(name, comment)
      else
        unget_tk tk
      end
    end

parse_rescue() click to toggle source

Parses a rescue

                   # File rdoc/parser/ruby.rb, line 1626
    def parse_rescue
      skip_tkspace false

      while tk = get_tk
        case tk[:kind]
        when :on_nl, :on_semicolon, :on_comment then
          break
        when :on_comma then
          skip_tkspace false

          get_tk if :on_nl == peek_tk[:kind]
        end

        skip_tkspace false
      end
    end

parse_statements(container, single = NORMAL, current_method = nil, comment = new_comment('')) click to toggle source

The core of the `Ruby` parser.

                   # File rdoc/parser/ruby.rb, line 1646
    def parse_statements(container, single = NORMAL, current_method = nil,
                         comment = new_comment(''))
      raise 'no' unless RDoc::Comment === comment
      comment = RDoc::Encoding.change_encoding comment, @encoding if @encoding

      nest = 1
      save_visibility = container.visibility

      non_comment_seen = true

      while tk = get_tk do
        keep_comment = false
        try_parse_comment = false

        non_comment_seen = true unless (:on_comment == tk[:kind] or :on_embdoc == tk[:kind])

        case tk[:kind]
        when :on_nl, :on_ignored_nl, :on_comment, :on_embdoc then
          if :on_nl == tk[:kind] or :on_ignored_nl == tk[:kind]
            skip_tkspace
            tk = get_tk
          else
            past_tokens = @read.size > 1 ? @read[0..-2] : []
            nl_position = 0
            past_tokens.reverse.each_with_index do |read_tk, i|
              if read_tk =~ /^\n$/ then
                nl_position = (past_tokens.size - 1) - i
                break
              elsif read_tk =~ /^#.*\n$/ then
                nl_position = ((past_tokens.size - 1) - i) + 1
                break
              end
            end
            comment_only_line = past_tokens[nl_position..-1].all?{ |c| c =~ /^\s+$/ }
            unless comment_only_line then
              tk = get_tk
            end
          end

          if tk and (:on_comment == tk[:kind] or :on_embdoc == tk[:kind]) then
            if non_comment_seen then
              # Look for RDoc in a comment about to be thrown away
              non_comment_seen = parse_comment container, tk, comment unless
                comment.empty?

              comment = ''
              comment = RDoc::Encoding.change_encoding comment, @encoding if @encoding
            end

            while tk and (:on_comment == tk[:kind] or :on_embdoc == tk[:kind]) do
              comment += tk[:text]
              comment += "\n" unless "\n" == tk[:text].chars.to_a.last

              if tk[:text].size > 1 && "\n" == tk[:text].chars.to_a.last then
                skip_tkspace false # leading spaces
              end
              tk = get_tk
            end

            comment = new_comment comment

            unless comment.empty? then
              look_for_directives_in container, comment

              if container.done_documenting then
                throw :eof if RDoc::TopLevel === container
                container.ongoing_visibility = save_visibility
              end
            end

            keep_comment = true
          else
            non_comment_seen = true
          end

          unget_tk tk
          keep_comment = true
          container.current_line_visibility = nil

        when :on_kw then
          case tk[:text]
          when 'class' then
            parse_class container, single, tk, comment

          when 'module' then
            parse_module container, single, tk, comment

          when 'def' then
            parse_method container, single, tk, comment

          when 'alias' then
            parse_alias container, single, tk, comment unless current_method

          when 'yield' 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

          when 'until', 'while' then
            if (tk[:state] & RDoc::RipperStateLex::EXPR_LABEL) == 0
              nest += 1
              skip_optional_do_after_expression
            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.

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

          when 'case', 'do', 'if', 'unless', 'begin' then
            if (tk[:state] & RDoc::RipperStateLex::EXPR_LABEL) == 0
              nest += 1
            end

          when 'super' then
            current_method.calls_super = true if current_method

          when 'rescue' then
            parse_rescue

          when 'end' then
            nest -= 1
            if nest == 0 then
              container.ongoing_visibility = save_visibility

              parse_comment container, tk, comment unless comment.empty?

              return
            end
          end

        when :on_const then
          unless parse_constant container, tk, comment, current_method then
            try_parse_comment = true
          end

        when :on_ident then
          if nest == 1 and current_method.nil? then
            keep_comment = parse_identifier container, single, tk, comment
          end

          case tk[:text]
          when "require" then
            parse_require container, comment
          when "include" then
            parse_extend_or_include RDoc::Include, container, comment
          when "extend" then
            parse_extend_or_include RDoc::Extend, container, comment
          end

        else
          try_parse_comment = nest == 1
        end

        if try_parse_comment then
          non_comment_seen = parse_comment container, tk, comment unless
            comment.empty?

          keep_comment = false
        end

        unless keep_comment then
          comment = new_comment ''
          comment = RDoc::Encoding.change_encoding comment, @encoding if @encoding
          container.params = nil
          container.block_params = nil
        end

        consume_trailing_spaces
      end

      container.params = nil
      container.block_params = nil
    end

parse_symbol_arg(no = nil) click to toggle source

Parse up to `no` symbol arguments

                   # File rdoc/parser/ruby.rb, line 1831
    def parse_symbol_arg(no = nil)
      skip_tkspace_comment

      tk = get_tk
      if tk[:kind] == :on_lparen
        parse_symbol_arg_paren no
      else
        parse_symbol_arg_space no, tk
      end
    end

parse_symbol_in_arg() click to toggle source

Returns symbol text from the next token

                   # File rdoc/parser/ruby.rb, line 1905
    def parse_symbol_in_arg
      tk = get_tk
      if :on_symbol == tk[:kind] then
        tk[:text].sub(/^:/, '')
      elsif :on_tstring == tk[:kind] then
        tk[:text][1..-2]
      elsif :on_dstring == tk[:kind] or :on_ident == tk[:kind] then
        nil # ignore
      else
        warn("Expected symbol or string, got #{tk.inspect}") if $DEBUG_RDOC
        nil
      end
    end

parse_top_level_statements(container) click to toggle source

Parses statements in the top-level `container`

                   # File rdoc/parser/ruby.rb, line 1922
    def parse_top_level_statements container
      comment = collect_first_comment

      look_for_directives_in container, comment

      throw :eof if container.done_documenting

      @markup = comment.format

      # HACK move if to RDoc::Context#comment=
      container.comment = comment if container.document_self unless comment.empty?

      parse_statements container, NORMAL, nil, comment
    end

parse_visibility(container, single, tk) click to toggle source

Determines the visibility in `container` from `tk`

                   # File rdoc/parser/ruby.rb, line 1940
    def parse_visibility(container, single, tk)
      vis_type, vis, singleton = get_visibility_information tk, single

      skip_tkspace_comment false

      ptk = peek_tk
      # Ryan Davis suggested the extension to ignore modifiers, because he
      # often writes
      #
      #   protected unless $TESTING
      #
      if [:on_nl, :on_semicolon].include?(ptk[:kind]) || (:on_kw == ptk[:kind] && (['if', 'unless'].include?(ptk[:text]))) then
        container.ongoing_visibility = vis
      elsif :on_kw == ptk[:kind] && 'def' == ptk[:text]
        container.current_line_visibility = vis
      else
        update_visibility container, vis_type, vis, singleton
      end
    end

parse_yield(context, single, tk, method) click to toggle source

Determines the block parameter for `context`

                   # File rdoc/parser/ruby.rb, line 1979
    def parse_yield(context, single, tk, method)
      return if method.block_params

      get_tkread
      method.block_params = parse_method_or_yield_parameters
    end

read_directive(allowed) click to toggle source

Directives are modifier comments that can appear after class, module, or method names. For example:

    def fred # :yields: a, b

or:

    class MyClass # :nodoc:

We return the directive name and any parameters as a two element array if the name is in `allowed`. A directive can be found anywhere up to the end of the current line.

                   # File rdoc/parser/ruby.rb, line 2000
    def read_directive allowed
      tokens = []

      while tk = get_tk do
        tokens << tk

        if :on_nl == tk[:kind] or (:on_kw == tk[:kind] && 'def' == tk[:text]) then
          return
        elsif :on_comment == tk[:kind] or :on_embdoc == tk[:kind] then
          return unless tk[:text] =~ /\s*:?([\w-]+):\s*(.*)/

          directive = $1.downcase

          return [directive, $2] if allowed.include? directive

          return
        end
      end
    ensure
      unless tokens.length == 1 and (:on_comment == tokens.first[:kind] or :on_embdoc == tokens.first[:kind]) then
        tokens.reverse_each do |token|
          unget_tk token
        end
      end
    end

read_documentation_modifiers(context, allowed) click to toggle source

Handles directives following the definition for `context` (any `RDoc::CodeObject`) if the directives are `allowed` at this point.

See also `RDoc::Markup::PreProcess#handle_directive`

                   # File rdoc/parser/ruby.rb, line 2032
    def read_documentation_modifiers context, allowed
      skip_tkspace(false)
      directive, value = read_directive allowed

      return unless directive

      @preprocess.handle_directive '', directive, value, context do |dir, param|
        if %w[notnew not_new not-new].include? dir then
          context.dont_rename_initialize = true

          true
        end
      end
    end

scan() click to toggle source

Scans this `Ruby` file for `Ruby` constructs

                   # File rdoc/parser/ruby.rb, line 2063
      def scan
        reset

        catch :eof do
          begin
            parse_top_level_statements @top_level

          rescue StandardError => e
            if @content.include?('<%') and @content.include?('%>') then
              # Maybe, this is ERB.
              $stderr.puts "\033[2KRDoc detects ERB file. Skips it for compatibility:"
              $stderr.puts @file_name
              return
            end
            bytes = ''

            if @scanner_point >= @scanner.size
              now_line_no = @scanner[@scanner.size - 1][:line_no]
            else
              now_line_no = peek_tk[:line_no]
            end

            $stderr.puts <<-EOF

    #{self.class} failure around line #{now_line_no} of
    #{@file_name}

            EOF

            unless bytes.empty? then
              $stderr.puts
              now_line_no = peek_tk[:line_no]
              start_index = @scanner.find_index { |tk| tk[:line_no] == now_line_no }
              end_index = @scanner.find_index { |tk| tk[:line_no] == now_line_no + 1 } - 1
              $stderr.puts @scanner[start_index..end_index].join
            end

            raise e
          end
        end

        @top_level
      end

skip_for_variable() click to toggle source

skip the var [in] part of a 'for' statement

                   # File rdoc/parser/ruby.rb, line 2151
    def skip_for_variable
      skip_tkspace false
      get_tk
      skip_tkspace false
      tk = get_tk
      unget_tk(tk) unless :on_kw == tk[:kind] and 'in' == tk[:text]
    end

skip_method(container) click to toggle source

Skips the next method in `container`

                   # File rdoc/parser/ruby.rb, line 2162
    def skip_method container
      meth = RDoc::AnyMethod.new "", "anon"
      parse_method_parameters meth
      parse_statements container, false, meth
    end

skip_optional_do_after_expression() click to toggle source

while, until, and for have an optional do

                   # File rdoc/parser/ruby.rb, line 2110
    def skip_optional_do_after_expression
      skip_tkspace false
      tk = get_tk

      b_nest = 0
      nest = 0

      loop do
        break unless tk
        case tk[:kind]
        when :on_semicolon, :on_nl, :on_ignored_nl then
          break if b_nest.zero?
        when :on_lparen then
          nest += 1
        when :on_rparen then
          nest -= 1
        when :on_kw then
          case tk[:text]
          when 'begin'
            b_nest += 1
          when 'end'
            b_nest -= 1
          when 'do'
            break if nest.zero?
          end
        when :on_comment, :on_embdoc then
          if b_nest.zero? and "\n" == tk[:text][-1] then
            break
          end
        end
        tk = get_tk
      end

      skip_tkspace false

      get_tk if peek_tk && :on_kw == peek_tk[:kind] && 'do' == peek_tk[:text]
    end

skip_tkspace_comment(skip_nl = true) click to toggle source

Skip spaces until a comment is found

                   # File rdoc/parser/ruby.rb, line 2171
    def skip_tkspace_comment(skip_nl = true)
      loop do
        skip_tkspace skip_nl
        next_tk = peek_tk
        return if next_tk.nil? || (:on_comment != next_tk[:kind] and :on_embdoc != next_tk[:kind])
        get_tk
      end
    end

tk_nl?(tk) click to toggle source

                   # File rdoc/parser/ruby.rb, line 191
    def tk_nl?(tk)
      :on_nl == tk[:kind] or :on_ignored_nl == tk[:kind]
    end

warn(message) click to toggle source

Prints `message` to +$stderr+ unless we're being quiet

                   # File rdoc/parser/ruby.rb, line 2228
    def warn message
      @options.warn make_message message
    end