Class: RDoc::Parser::Ruby

Inherits:
RDoc::Parser show all
Includes:
RubyTools, TokenStream
Defined in:
lib/rdoc/parser/ruby.rb

Overview

Extracts code elements from a source file returning a TopLevel object containing the constituent file elements.

This file is based on rtags

RubyParser understands how to document:

  • classes

  • modules

  • methods

  • constants

  • aliases

  • private, public, protected

  • private_class_function, public_class_function

  • private_constant, public_constant

  • module_function

  • attr, attr_reader, attr_writer, attr_accessor

  • extra accessors given on the command line

  • metaprogrammed methods

  • require

  • include

Method Arguments

– NOTE: I don’t think this works, needs tests, remove the paragraph following this block when known to work

The parser extracts the arguments from the method definition. You can override this with a custom argument definition using the :args: directive:

##
# This method tries over and over until it is tired

def go_go_go(thing_to_try, tries = 10) # :args: thing_to_try
  puts thing_to_try
  go_go_go thing_to_try, tries - 1
end

If you have a more-complex set of overrides you can use the :call-seq: directive: ++

The parser extracts the arguments from the method definition. You can override this with a custom argument definition using the :call-seq: directive:

##
# This method can be called with a range or an offset and length
#
# :call-seq:
#   my_method(Range)
#   my_method(offset, length)

def my_method(*args)
end

The parser extracts yield expressions from method bodies to gather the yielded argument names. If your method manually calls a block instead of yielding or you want to override the discovered argument names use the :yields: directive:

##
# My method is awesome

def my_method(&block) # :yields: happy, times
  block.call 1, 2
end

Metaprogrammed Methods

To pick up a metaprogrammed method, the parser looks for a comment starting with ‘##’ before an identifier:

##
# This is a meta-programmed method!

add_my_method :meta_method, :arg1, :arg2

The parser looks at the token after the identifier to determine the name, in this example, :meta_method. If a name cannot be found, a warning is printed and ‘unknown is used.

You can force the name of a method using the :method: directive:

##
# :method: some_method!

By default, meta-methods are instance methods. To indicate that a method is a singleton method instead use the :singleton-method: directive:

##
# :singleton-method:

You can also use the :singleton-method: directive with a name:

##
# :singleton-method: some_method!

You can define arguments for metaprogrammed methods via either the :call-seq:, :arg: or :args: directives.

Additionally you can mark a method as an attribute by using :attr:, :attr_reader:, :attr_writer: or :attr_accessor:. Just like for :method:, the name is optional.

##
# :attr_reader: my_attr_name

Hidden methods and attributes

You can provide documentation for methods that don’t appear using the :method:, :singleton-method: and :attr: directives:

##
# :attr_writer: ghost_writer
# There is an attribute here, but you can't see it!

##
# :method: ghost_method
# There is a method here, but you can't see it!

##
# this is a comment for a regular method

def regular_method() end

Note that by default, the :method: directive will be ignored if there is a standard rdocable item following it.

Constant Summary collapse

NORMAL =

RDoc::NormalClass type

"::"
SINGLE =

RDoc::SingleClass type

"<<"

Instance Attribute Summary

Attributes inherited from RDoc::Parser

#file_name

Instance Method Summary collapse

Methods included from RubyTools

#add_token_listener, #get_tk, #get_tk_until, #get_tkread, #peek_read, #peek_tk, #remove_token_listener, #reset, #skip_tkspace, #skip_tkspace_without_nl, #token_listener, #unget_tk

Methods included from TokenStream

#add_token, #add_tokens, #collect_tokens, #pop_token, to_html, #token_stream, #tokens_to_s

Methods inherited from RDoc::Parser

alias_extension, binary?, can_parse, can_parse_by_name, check_modeline, for, #handle_tab_width, parse_files_matching, remove_modeline, use_markup, zip?

Constructor Details

#initialize(top_level, file_name, content, options, stats) ⇒ Ruby

Creates a new Ruby parser.



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# File 'lib/rdoc/parser/ruby.rb', line 164

def initialize(top_level, file_name, content, options, stats)
  super

  content = handle_tab_width(content)

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

  reset
end

Instance Method Details

#collect_first_comment ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 236

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
  line_no = nil

  tk = get_tk

  while tk && (:on_comment == tk[:kind] or :on_embdoc == tk[:kind])
    comment_body = retrieve_comment_body(tk)
    if first_line and comment_body =~ /\A#!/ then
      skip_tkspace
      tk = get_tk
    elsif first_line and comment_body =~ /\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]

      line_no = tk[:line_no] if first_line
      first_line = false
      comment << comment_body
      tk = get_tk

      if :on_nl === tk then
        skip_tkspace_without_nl
        tk = get_tk
      end
    end
  end

  unget_tk tk

  new_comment comment, line_no
end

#consume_trailing_spaces ⇒ Object

Consumes trailing whitespace from the token stream



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# File 'lib/rdoc/parser/ruby.rb', line 279

def consume_trailing_spaces # :nodoc:
  skip_tkspace_without_nl
end

#create_attr(container, single, name, rw, comment) ⇒ Object

Creates a new attribute in container with name.



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# File 'lib/rdoc/parser/ruby.rb', line 286

def create_attr container, single, name, rw, comment # :nodoc:
  att = RDoc::Attr.new get_tkread, name, rw, comment, single == SINGLE
  record_location att

  container.add_attribute att
  @stats.add_attribute att

  att
end

#create_module_alias(container, constant, rhs_name) ⇒ Object

Creates a module alias in container at rhs_name (or at the top-level for “::”) with the name from constant.



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# File 'lib/rdoc/parser/ruby.rb', line 300

def create_module_alias container, constant, rhs_name # :nodoc:
  mod = if rhs_name =~ /^::/ then
          @store.find_class_or_module rhs_name
        else
          container.find_module_named rhs_name
        end

  container.add_module_alias mod, rhs_name, constant, @top_level
end

#error(msg) ⇒ Object

Aborts with msg



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# File 'lib/rdoc/parser/ruby.rb', line 313

def error(msg)
  msg = make_message msg

  abort msg
end

#get_bool ⇒ Object

Looks for a true or false token.



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# File 'lib/rdoc/parser/ruby.rb', line 322

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) ⇒ Object

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 ::).



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# File 'lib/rdoc/parser/ruby.rb', line 340

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_without_nl
  given_name << name_t[:text]

  is_self = name_t[:kind] == :on_op && name_t[:text] == '<<'
  new_modules = []
  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
        c = RDoc::NormalModule.new name_t[:text]
        c.store = @store
        new_modules << [prev_container, c]
        c
      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
    if :on_lparen == peek_tk[:kind] # ProcObjectInConstant::()
      parse_method_or_yield_parameters
      break
    end
    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_without_nl

  return [container, name_t, given_name, new_modules]
end

#get_class_specification ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 423

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_without_nl

  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 ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 456

def get_constant
  res = ""
  skip_tkspace_without_nl
  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_end_token(tk) ⇒ Object

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”



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# File 'lib/rdoc/parser/ruby.rb', line 558

def get_end_token tk # :nodoc:
  case tk[:kind]
  when :on_lparen
    token = RDoc::Parser::RipperStateLex::Token.new
    token[:kind] = :on_rparen
    token[:text] = ')'
    token
  when :on_rparen
    nil
  else
    token = RDoc::Parser::RipperStateLex::Token.new
    token[:kind] = :on_nl
    token[:text] = "\n"
    token
  end
end

#get_included_module_with_optional_parens ⇒ Object

Get an included module that may be surrounded by parens



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# File 'lib/rdoc/parser/ruby.rb', line 473

def get_included_module_with_optional_parens
  skip_tkspace_without_nl
  get_tkread
  tk = get_tk
  end_token = get_end_token tk
  return '' unless end_token

  nest = 0
  continue = false
  only_constant = true

  while tk != nil do
    is_element_of_constant = false
    case tk[:kind]
    when :on_semicolon then
      break if nest == 0
    when :on_lbracket then
      nest += 1
    when :on_rbracket then
      nest -= 1
    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 if nest <= 0
      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::Parser::RipperStateLex::EXPR_LABEL) != 0) then
        break if !continue and nest <= 0
      end
    when :on_comma then
      continue = true
    when :on_ident then
      continue = false if continue
    when :on_kw then
      case tk[:text]
      when 'def', 'do', 'case', 'for', 'begin', 'class', 'module'
        nest += 1
      when 'if', 'unless', 'while', 'until', 'rescue'
        # postfix if/unless/while/until/rescue must be EXPR_LABEL
        nest += 1 unless (tk[:state] & RDoc::Parser::RipperStateLex::EXPR_LABEL) != 0
      when 'end'
        nest -= 1
        break if nest == 0
      end
    when :on_const then
      is_element_of_constant = true
    when :on_op then
      is_element_of_constant = true if '::' == tk[:text]
    end
    only_constant = false unless is_element_of_constant
    tk = get_tk
  end

  if only_constant
    get_tkread_clean(/\s+/, ' ')
  else
    ''
  end
end

#get_method_container(container, name_t) ⇒ Object

Retrieves the method container for a singleton method.



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# File 'lib/rdoc/parser/ruby.rb', line 578

def get_method_container container, name_t # :nodoc:
  prev_container = container
  container = container.find_module_named(name_t[:text])

  unless container then
    constant = prev_container.constants.find do |const|
      const.name == name_t[:text]
    end

    if constant then
      parse_method_dummy prev_container
      return
    end
  end

  unless container then
    # TODO seems broken, should starting at Object in @store
    obj = name_t[:text].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[:text]}. Assuming it's a module")
    end

    if type == RDoc::NormalClass then
      sclass = obj.superclass ? obj.superclass.name : nil
      container = prev_container.add_class type, name_t[:text], sclass
    else
      container = prev_container.add_module type, name_t[:text]
    end

    record_location container
  end

  container
end

#get_symbol_or_name ⇒ Object

Extracts a name or symbol from the token stream.



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# File 'lib/rdoc/parser/ruby.rb', line 621

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

#get_tkread_clean(pattern, replacement) ⇒ Object

Retrieves the read token stream and replaces pattern with replacement using gsub. If the result is only a “;” returns an empty string.



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# File 'lib/rdoc/parser/ruby.rb', line 194

def get_tkread_clean pattern, replacement # :nodoc:
  read = get_tkread.gsub(pattern, replacement).strip
  return '' if read == ';'
  read
end

#get_visibility_information(tk, single) ⇒ Object

Extracts the visibility information for the visibility token tk and single class type identifier.

Returns the visibility type (a string), the visibility (a symbol) and singleton if the methods following should be converted to singleton methods.



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# File 'lib/rdoc/parser/ruby.rb', line 208

def get_visibility_information tk, single # :nodoc:
  vis_type  = tk[:text]
  singleton = single == SINGLE

  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 RDoc::Error, "Invalid visibility: #{tk.name}"
    end

  return vis_type, vis, singleton
end

#look_for_directives_in(container, comment) ⇒ Object

Look for directives in a normal comment block:

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

This routine modifies its comment parameter.



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# File 'lib/rdoc/parser/ruby.rb', line 661

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) ⇒ Object

Adds useful info about the parser to message



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# File 'lib/rdoc/parser/ruby.rb', line 681

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, line_no = nil) ⇒ Object

Creates a comment with the correct format



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# File 'lib/rdoc/parser/ruby.rb', line 693

def new_comment comment, line_no = nil
  c = RDoc::Comment.new comment, @top_level, :ruby
  c.line = line_no
  c.format = @markup
  c
end

#parse_alias(context, single, tk, comment) ⇒ Object

Parses an alias in context with comment



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# File 'lib/rdoc/parser/ruby.rb', line 762

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
  if al.document_self or not @track_visibility
    context.add_alias al
    @stats.add_alias al
  end

  al
end

#parse_attr(context, single, tk, comment) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 704

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_without_nl
    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) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 733

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) ⇒ Object

Extracts call parameters from the token stream.



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# File 'lib/rdoc/parser/ruby.rb', line 803

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::Parser::RipperStateLex.end?(tk) and nest <= 0
      else
        break if RDoc::Parser::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) ⇒ Object

Parses a class in context with comment



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# File 'lib/rdoc/parser/ruby.rb', line 846

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 = skip_parentheses { 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_class_regular(container, declaration_context, single, name_t, given_name, comment) ⇒ Object

Parses and creates a regular class



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# File 'lib/rdoc/parser/ruby.rb', line 880

def parse_class_regular container, declaration_context, single, # :nodoc:
                        name_t, given_name, comment
  superclass = '::Object'

  if given_name =~ /^::/ then
    declaration_context = @top_level
    given_name = $'
  end

  tk = peek_tk
  if tk[:kind] == :on_op && tk[:text] == '<' then
    get_tk
    skip_tkspace
    superclass = get_class_specification
    superclass = '(unknown)' if superclass.empty?
  end

  cls_type = single == SINGLE ? RDoc::SingleClass : RDoc::NormalClass
  cls = declaration_context.add_class cls_type, given_name, superclass
  cls.ignore unless container.document_children

  read_documentation_modifiers cls, RDoc::CLASS_MODIFIERS
  record_location cls

  cls.add_comment comment, @top_level

  @top_level.add_to_classes_or_modules cls
  @stats.add_class cls

  suppress_parents container, declaration_context unless cls.document_self

  parse_statements cls

  cls
end

#parse_class_singleton(container, name, comment) ⇒ Object

Parses a singleton class in container with the given name and comment.



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# File 'lib/rdoc/parser/ruby.rb', line 920

def parse_class_singleton container, name, comment # :nodoc:
  other = @store.find_class_named name

  unless other then
    if name =~ /^::/ then
      name = $'
      container = @top_level
    end

    other = container.add_module RDoc::NormalModule, name
    record_location other

    # class << $gvar
    other.ignore if name.empty?

    other.add_comment comment, @top_level
  end

  # notify :nodoc: all if not a constant-named class/module
  # (and remove any comment)
  unless name =~ /\A(::)?[A-Z]/ then
    other.document_self = nil
    other.document_children = false
    other.clear_comment
  end

  @top_level.add_to_classes_or_modules other
  @stats.add_class other

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

  other
end

#parse_comment(container, tk, comment) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 1085

def parse_comment container, tk, comment
  return parse_comment_tomdoc container, tk, comment if @markup == 'tomdoc'
  column  = tk[:char_no]
  line_no = comment.line.nil? ? tk[:line_no] : comment.line

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

  co =
    if (comment.text = comment.text.sub(/^# +:?method: *(\S*).*?\n/i, '')) && !!$~ then
      line_no += $`.count("\n")
      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_attr(container, type, name, comment) ⇒ Object

Parse a comment that is describing an attribute in container with the given name and comment.



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# File 'lib/rdoc/parser/ruby.rb', line 1113

def parse_comment_attr container, type, name, comment # :nodoc:
  return if name.empty?

  rw = case type
       when 'attr_reader' then 'R'
       when 'attr_writer' then 'W'
       else 'RW'
       end

  create_attr container, NORMAL, name, rw, comment
end

#parse_comment_ghost(container, text, name, column, line_no, comment) ⇒ Object

:nodoc:



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# File 'lib/rdoc/parser/ruby.rb', line 1125

def parse_comment_ghost container, text, name, column, line_no, # :nodoc:
                        comment
  name = nil if name.empty?

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

  meth.start_collecting_tokens
  indent = RDoc::Parser::RipperStateLex::Token.new(1, 1, :on_sp, ' ' * column)
  position_comment = RDoc::Parser::RipperStateLex::Token.new(line_no, 1, :on_comment)
  position_comment[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
  newline = RDoc::Parser::RipperStateLex::Token.new(0, 0, :on_nl, "\n")
  meth.add_tokens [position_comment, newline, indent]

  meth.params =
    if text.sub!(/^#\s+:?args?:\s*(.*?)\s*$/i, '') then
      $1
    else
      ''
    end

  comment.normalize
  comment.extract_call_seq meth

  return unless meth.name

  container.add_method meth

  meth.comment = comment

  @stats.add_method meth

  meth
end

#parse_comment_tomdoc(container, tk, comment) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 1164

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 = RDoc::Parser::RipperStateLex::Token.new(1, 1, :on_sp, ' ' * column)
  position_comment = RDoc::Parser::RipperStateLex::Token.new(line_no, 1, :on_comment)
  position_comment[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
  newline = RDoc::Parser::RipperStateLex::Token.new(0, 0, :on_nl, "\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) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 959

def parse_constant container, tk, comment, ignore_constants = false
  line_no = tk[:line_no]

  name = tk[:text]
  skip_tkspace_without_nl

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

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

    container, name_t, _, new_modules = get_class_or_module container, true

    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_without_nl
    is_array_or_hash = true
  end

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

  unless ignore_constants
    new_modules.each do |prev_c, new_module|
      prev_c.add_module_by_normal_module new_module
      new_module.ignore unless prev_c.document_children
      @top_level.add_to_classes_or_modules new_module
    end
  end

  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_body(container, constant, is_array_or_hash) ⇒ Object

:nodoc:



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# File 'lib/rdoc/parser/ruby.rb', line 1026

def parse_constant_body container, constant, is_array_or_hash # :nodoc:
  nest     = 0
  rhs_name = ''.dup

  get_tkread

  tk = get_tk

  body = nil
  loop do
    break if tk.nil?
    if :on_semicolon == tk[:kind] then
      break if nest <= 0
    elsif [:on_tlambeg, :on_lparen, :on_lbrace, :on_lbracket].include?(tk[:kind]) then
      nest += 1
    elsif (:on_kw == tk[:kind] && 'def' == tk[:text]) then
      nest += 1
    elsif (:on_kw == tk[:kind] && %w{do if unless case begin}.include?(tk[:text])) then
      if (tk[:state] & RDoc::Parser::RipperStateLex::EXPR_LABEL) == 0
        nest += 1
      end
    elsif [:on_rparen, :on_rbrace, :on_rbracket].include?(tk[:kind]) ||
          (:on_kw == tk[:kind] && 'end' == tk[:text]) then
      nest -= 1
    elsif (:on_comment == tk[:kind] or :on_embdoc == tk[:kind]) then
      unget_tk tk
      if nest <= 0 and RDoc::Parser::RipperStateLex.end?(tk) then
        body = get_tkread_clean(/^[ \t]+/, '')
        read_documentation_modifiers constant, RDoc::CONSTANT_MODIFIERS
        break
      else
        read_documentation_modifiers constant, RDoc::CONSTANT_MODIFIERS
      end
    elsif :on_const == tk[:kind] then
      rhs_name << tk[:text]

      next_tk = peek_tk
      if nest <= 0 and (next_tk.nil? || :on_nl == next_tk[:kind]) then
        create_module_alias container, constant, rhs_name unless is_array_or_hash
        break
      end
    elsif :on_nl == tk[:kind] then
      if nest <= 0 and RDoc::Parser::RipperStateLex.end?(tk) then
        unget_tk tk
        break
      end
    elsif :on_op == tk[:kind] && '::' == tk[:text]
      rhs_name << '::'
    end
    tk = get_tk
  end

  body ? body : get_tkread_clean(/^[ \t]+/, '')
end

#parse_constant_visibility(container, single, tk) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 2103

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_extend_or_include(klass, container, comment) ⇒ Object

Parses an include or extend, indicated by the klass and adds it to container # with comment



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# File 'lib/rdoc/parser/ruby.rb', line 1199

def parse_extend_or_include klass, container, comment # :nodoc:
  loop do
    skip_tkspace_comment

    name = get_included_module_with_optional_parens

    unless name.empty? then
      obj = container.add klass, name, comment
      record_location obj
    end

    return if peek_tk.nil? || :on_comma != peek_tk[:kind]

    get_tk
  end
end

#parse_identifier(container, single, tk, comment) ⇒ Object

Parses identifiers that can create new methods or change visibility.

Returns true if the comment was not consumed.



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# File 'lib/rdoc/parser/ruby.rb', line 1237

def parse_identifier container, single, tk, comment # :nodoc:
  case tk[:text]
  when 'private', 'protected', 'public', 'private_class_method',
       'public_class_method', 'module_function' then
    parse_visibility container, single, tk
    return true
  when 'private_constant', 'public_constant'
    parse_constant_visibility container, single, tk
    return true
  when 'attr' then
    parse_attr container, single, tk, comment
  when /^attr_(reader|writer|accessor)$/ then
    parse_attr_accessor container, single, tk, comment
  when 'alias_method' then
    parse_alias container, single, tk, comment
  when 'require', 'include' then
    # ignore
  else
    if comment.text =~ /\A#\#$/ then
      case comment.text
      when /^# +:?attr(_reader|_writer|_accessor)?:/ then
        parse_meta_attr container, single, tk, comment
      else
        method = parse_meta_method container, single, tk, comment
        method.params = container.params if
          container.params
        method.block_params = container.block_params if
          container.block_params
      end
    end
  end

  false
end

#parse_included_with_activesupport_concern(container, comment) ⇒ Object

Parses an included with a block feature of ActiveSupport::Concern.



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# File 'lib/rdoc/parser/ruby.rb', line 1219

def parse_included_with_activesupport_concern container, comment # :nodoc:
  skip_tkspace_without_nl
  tk = get_tk
  unless tk[:kind] == :on_lbracket || (tk[:kind] == :on_kw && tk[:text] == 'do')
    unget_tk tk
    return nil # should be a block
  end

  parse_statements container

  container
end

#parse_meta_attr(context, single, tk, comment) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 1301

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) ⇒ Object

Parses a meta-programmed method



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# File 'lib/rdoc/parser/ruby.rb', line 1335

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_without_nl

  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 = RDoc::Parser::RipperStateLex::Token.new(1, 1, :on_sp, ' ' * column)
  position_comment = RDoc::Parser::RipperStateLex::Token.new(line_no, 1, :on_comment)
  position_comment[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
  newline = RDoc::Parser::RipperStateLex::Token.new(0, 0, :on_nl, "\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_meta_method_name(comment, tk) ⇒ Object

Parses the name of a metaprogrammed method. comment is used to determine the name while tk is used in an error message if the name cannot be determined.



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# File 'lib/rdoc/parser/ruby.rb', line 1381

def parse_meta_method_name comment, tk # :nodoc:
  if comment.text.sub!(/^# +:?method: *(\S*).*?\n/i, '') then
    return $1 unless $1.empty?
  end

  name_t = get_tk

  if :on_symbol == name_t[:kind] then
    name_t[:text][1..-1]
  elsif :on_tstring == name_t[:kind] then
    name_t[:text][1..-2]
  elsif :on_op == name_t[:kind] && '=' == name_t[:text] then # ignore
    remove_token_listener self

    nil
  else
    warn "unknown name token #{name_t.inspect} for meta-method '#{tk[:text]}'"
    'unknown'
  end
end

#parse_meta_method_params(container, single, meth, tk, comment) ⇒ Object

Parses the parameters and block for a meta-programmed method.



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# File 'lib/rdoc/parser/ruby.rb', line 1405

def parse_meta_method_params container, single, meth, tk, comment # :nodoc:
  token_listener meth do
    meth.params = ''

    look_for_directives_in meth, comment
    comment.normalize
    comment.extract_call_seq meth

    container.add_method meth

    last_tk = tk

    while tk = get_tk do
      if :on_semicolon == tk[:kind] then
        break
      elsif :on_nl == tk[:kind] then
        break unless last_tk and :on_comma == last_tk[:kind]
      elsif :on_sp == tk[:kind] then
        # expression continues
      elsif :on_kw == tk[:kind] && 'do' == tk[:text] then
        parse_statements container, single, meth
        break
      else
        last_tk = tk
      end
    end
  end
end

#parse_method(container, single, tk, comment) ⇒ Object

Parses a normal method defined by def



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# File 'lib/rdoc/parser/ruby.rb', line 1437

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
  if singleton
    # `current_line_visibility' is useless because it works against
    # the normal method named as same as the singleton method, after
    # the latter was defined.  Of course these are different things.
    container.current_line_visibility = :public
  end

  record_location meth
  meth.line   = line_no

  meth.start_collecting_tokens
  indent = RDoc::Parser::RipperStateLex::Token.new(1, 1, :on_sp, ' ' * column)
  token = RDoc::Parser::RipperStateLex::Token.new(line_no, 1, :on_comment)
  token[:text] = "# File #{@top_level.relative_name}, line #{line_no}"
  newline = RDoc::Parser::RipperStateLex::Token.new(0, 0, :on_nl, "\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) ⇒ Object

Parses a method that needs to be ignored.



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# File 'lib/rdoc/parser/ruby.rb', line 1522

def parse_method_dummy container
  dummy = RDoc::Context.new
  dummy.parent = container
  dummy.store  = container.store
  skip_method dummy
end

#parse_method_name(container) ⇒ Object

Parses the name of a method in container.

Returns the method name, the container it is in (for def Foo.name) and if it is a singleton or regular method.



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# File 'lib/rdoc/parser/ruby.rb', line 1535

def parse_method_name container # :nodoc:
  skip_tkspace
  name_t = get_tk
  back_tk = skip_tkspace_without_nl
  singleton = false

  dot = get_tk
  if dot[:kind] == :on_period || (dot[:kind] == :on_op && dot[:text] == '::') then
    singleton = true

    name, container = parse_method_name_singleton container, name_t
  else
    unget_tk dot
    back_tk.reverse_each do |token|
      unget_tk token
    end

    name = parse_method_name_regular container, name_t
  end

  return name, container, singleton
end

#parse_method_name_regular(container, name_t) ⇒ Object

For the given container and initial name token name_t the method name is parsed from the token stream for a regular method.



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# File 'lib/rdoc/parser/ruby.rb', line 1562

def parse_method_name_regular container, name_t # :nodoc:
  if :on_op == name_t[:kind] && (%w{* & [] []= <<}.include?(name_t[:text])) then
    name_t[:text]
  else
    unless [:on_kw, :on_const, :on_ident].include?(name_t[:kind]) then
      warn "expected method name token, . or ::, got #{name_t.inspect}"
      skip_method container
      return
    end
    name_t[:text]
  end
end

#parse_method_name_singleton(container, name_t) ⇒ Object

For the given container and initial name token name_t the method name and the new container (if necessary) are parsed from the token stream for a singleton method.



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# File 'lib/rdoc/parser/ruby.rb', line 1580

def parse_method_name_singleton container, name_t # :nodoc:
  skip_tkspace
  name_t2 = get_tk

  if (:on_kw == name_t[:kind] && 'self' == name_t[:text]) || (:on_op == name_t[:kind] && '%' == name_t[:text]) then
    # NOTE: work around '[' being consumed early
    if :on_lbracket == name_t2[:kind]
      get_tk
      name = '[]'
    else
      name = name_t2[:text]
    end
  elsif :on_const == name_t[:kind] then
    name = name_t2[:text]

    container = get_method_container container, name_t

    return unless container

    name
  elsif :on_ident == name_t[:kind] || :on_ivar == name_t[:kind] || :on_gvar == name_t[:kind] then
    parse_method_dummy container

    name = nil
  elsif (:on_kw == name_t[:kind]) && ('true' == name_t[:text] || 'false' == name_t[:text] || 'nil' == name_t[:text]) then
    klass_name = "#{name_t[:text].capitalize}Class"
    container = @store.find_class_named klass_name
    container ||= @top_level.add_class RDoc::NormalClass, klass_name

    name = name_t2[:text]
  else
    warn "unexpected method name token #{name_t.inspect}"
    # break
    skip_method container

    name = nil
  end

  return name, container
end

#parse_method_or_yield_parameters(method = nil, modifiers = RDoc::METHOD_MODIFIERS) ⇒ Object

Extracts yield parameters from method



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# File 'lib/rdoc/parser/ruby.rb', line 1624

def parse_method_or_yield_parameters(method = nil,
                                     modifiers = RDoc::METHOD_MODIFIERS)
  skip_tkspace_without_nl
  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_lbracket then
      nest += 1
    when :on_rbracket then
      nest -= 1
    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::Parser::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) ⇒ Object

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

# yields: ....

and add this as the block_params for the method



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# File 'lib/rdoc/parser/ruby.rb', line 1691

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_without_nl
  read_documentation_modifiers method, RDoc::METHOD_MODIFIERS
end

#parse_method_params_and_body(container, single, meth, added_container) ⇒ Object

Parses the parameters and body of meth



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# File 'lib/rdoc/parser/ruby.rb', line 1492

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) ⇒ Object

Parses an RDoc::NormalModule in container with comment



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# File 'lib/rdoc/parser/ruby.rb', line 1706

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) ⇒ Object

Parses an RDoc::Require in context containing comment



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# File 'lib/rdoc/parser/ruby.rb', line 1728

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 ⇒ Object

Parses a rescue



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# File 'lib/rdoc/parser/ruby.rb', line 1749

def parse_rescue
  skip_tkspace_without_nl

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

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

    skip_tkspace_without_nl
  end
end

#parse_statements(container, single = NORMAL, current_method = nil, comment = new_comment('')) ⇒ Object

The core of the Ruby parser.



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# File 'lib/rdoc/parser/ruby.rb', line 1780

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
  container.visibility = :public unless current_method

  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

        line_no = nil
        while tk and (:on_comment == tk[:kind] or :on_embdoc == tk[:kind]) do
          comment_body = retrieve_comment_body(tk)
          line_no = tk[:line_no] if comment.empty?
          comment += comment_body
          comment << "\n" unless comment_body =~ /\n\z/

          if comment_body.size > 1 && comment_body =~ /\n\z/ then
            skip_tkspace_without_nl # leading spaces
          end
          tk = get_tk
        end

        comment = new_comment comment, line_no

        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::Parser::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::Parser::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
      when "included" then
        parse_included_with_activesupport_concern 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) ⇒ Object

Parse up to no symbol arguments



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# File 'lib/rdoc/parser/ruby.rb', line 1971

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_arg_paren(no) ⇒ Object

Parses up to no symbol arguments surrounded by () and places them in args.



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# File 'lib/rdoc/parser/ruby.rb', line 1986

def parse_symbol_arg_paren no # :nodoc:
  args = []

  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)[:kind]
    when :on_rparen
      break
    when :on_comma
    else
      warn("unexpected token: '#{tk2.inspect}'") if $DEBUG_RDOC
      break
    end
  end

  args
end

#parse_symbol_arg_space(no, tk) ⇒ Object

Parses up to no symbol arguments separated by spaces and places them in args.



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# File 'lib/rdoc/parser/ruby.rb', line 2014

def parse_symbol_arg_space no, tk # :nodoc:
  args = []

  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_without_nl

    tk1 = get_tk
    if tk1.nil? || :on_comma != tk1[:kind] 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

  args
end

#parse_symbol_in_arg ⇒ Object

Returns symbol text from the next token



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# File 'lib/rdoc/parser/ruby.rb', line 2045

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) ⇒ Object

Parses statements in the top-level container



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# File 'lib/rdoc/parser/ruby.rb', line 2062

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) ⇒ Object

Determines the visibility in container from tk



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# File 'lib/rdoc/parser/ruby.rb', line 2080

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) ⇒ Object

Determines the block parameter for context



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# File 'lib/rdoc/parser/ruby.rb', line 2119

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) ⇒ Object

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.



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# File 'lib/rdoc/parser/ruby.rb', line 2140

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] =~ /:?\b([\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) ⇒ Object

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



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# File 'lib/rdoc/parser/ruby.rb', line 2172

def read_documentation_modifiers context, allowed
  skip_tkspace_without_nl
  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

#record_location(container) ⇒ Object

Records the location of this container in the file for this parser and adds it to the list of classes and modules in the file.



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# File 'lib/rdoc/parser/ruby.rb', line 2191

def record_location container # :nodoc:
  case container
  when RDoc::ClassModule then
    @top_level.add_to_classes_or_modules container
  end

  container.record_location @top_level
end

#retrieve_comment_body(tk) ⇒ Object

Retrieve comment body without =begin/=end



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# File 'lib/rdoc/parser/ruby.rb', line 1769

def retrieve_comment_body(tk)
  if :on_embdoc == tk[:kind]
    tk[:text].gsub(/\A=begin.*\n/, '').gsub(/=end\n?\z/, '')
  else
    tk[:text]
  end
end

#scan ⇒ Object

Scans this Ruby file for Ruby constructs



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# File 'lib/rdoc/parser/ruby.rb', line 2203

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

      if @scanner_point >= @scanner.size
        now_line_no = @scanner[@scanner.size - 1][:line_no]
      else
        now_line_no = peek_tk[:line_no]
      end
      first_tk_index = @scanner.find_index { |tk| tk[:line_no] == now_line_no }
      last_tk_index = @scanner.find_index { |tk| tk[:line_no] == now_line_no + 1 }
      last_tk_index = last_tk_index ? last_tk_index - 1 : @scanner.size - 1
      code = @scanner[first_tk_index..last_tk_index].map{ |t| t[:text] }.join

      $stderr.puts <<-EOF

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

      EOF

      unless code.empty? then
        $stderr.puts code
        $stderr.puts
      end

      raise e
    end
  end

  @top_level
end

#skip_for_variable ⇒ Object

skip the var [in] part of a ‘for’ statement



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# File 'lib/rdoc/parser/ruby.rb', line 2291

def skip_for_variable
  skip_tkspace_without_nl
  get_tk
  skip_tkspace_without_nl
  tk = get_tk
  unget_tk(tk) unless :on_kw == tk[:kind] and 'in' == tk[:text]
end

#skip_method(container) ⇒ Object

Skips the next method in container



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# File 'lib/rdoc/parser/ruby.rb', line 2302

def skip_method container
  meth = RDoc::AnyMethod.new "", "anon"
  parse_method_parameters meth
  parse_statements container, false, meth
end

#skip_optional_do_after_expression ⇒ Object

while, until, and for have an optional do



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# File 'lib/rdoc/parser/ruby.rb', line 2250

def skip_optional_do_after_expression
  skip_tkspace_without_nl
  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_without_nl

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

#skip_parentheses(&block) ⇒ Object

Skip opening parentheses and yield the block. Skip closing parentheses too when exists.



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# File 'lib/rdoc/parser/ruby.rb', line 401

def skip_parentheses(&block)
  left_tk = peek_tk

  if :on_lparen == left_tk[:kind]
    get_tk

    ret = skip_parentheses(&block)

    right_tk = peek_tk
    if :on_rparen == right_tk[:kind]
      get_tk
    end

    ret
  else
    yield
  end
end

#skip_tkspace_comment(skip_nl = true) ⇒ Object

Skip spaces until a comment is found



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# File 'lib/rdoc/parser/ruby.rb', line 2311

def skip_tkspace_comment(skip_nl = true)
  loop do
    skip_nl ? skip_tkspace : skip_tkspace_without_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

#suppress_parents(container, ancestor) ⇒ Object

Marks containers between container and ancestor as ignored



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# File 'lib/rdoc/parser/ruby.rb', line 646

def suppress_parents container, ancestor # :nodoc:
  while container and container != ancestor do
    container.suppress unless container.documented?
    container = container.parent
  end
end

#tk_nl?(tk) ⇒ Boolean

Return true if tk is a newline.

Returns:

  • (Boolean) 


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# File 'lib/rdoc/parser/ruby.rb', line 186

def tk_nl?(tk)
  :on_nl == tk[:kind] or :on_ignored_nl == tk[:kind]
end

#update_visibility(container, vis_type, vis, singleton) ⇒ Object

Updates visibility in container from vis_type and vis.



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# File 'lib/rdoc/parser/ruby.rb', line 2323

def update_visibility container, vis_type, vis, singleton # :nodoc:
  new_methods = []

  case vis_type
  when 'module_function' then
    args = parse_symbol_arg
    container.set_visibility_for args, :private, false

    container.methods_matching args do |m|
      s_m = m.dup
      record_location s_m
      s_m.singleton = true
      new_methods << s_m
    end
  when 'public_class_method', 'private_class_method' then
    args = parse_symbol_arg

    container.methods_matching args, true do |m|
      if m.parent != container then
        m = m.dup
        record_location m
        new_methods << m
      end

      m.visibility = vis
    end
  else
    args = parse_symbol_arg
    container.set_visibility_for args, vis, singleton
  end

  new_methods.each do |method|
    case method
    when RDoc::AnyMethod then
      container.add_method method
    when RDoc::Attr then
      container.add_attribute method
    end
    method.visibility = vis
  end
end

#warn(message) ⇒ Object

Prints message to $stderr unless we’re being quiet



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# File 'lib/rdoc/parser/ruby.rb', line 2368

def warn message
  @options.warn make_message message
end