class RDoc::Comment

A comment holds the text comment for a RDoc::CodeObject and provides a unified way of cleaning it up and parsing it into an RDoc::Markup::Document.

Each comment may have a different markup format set by format=. By default ‘rdoc’ is used. The :markup: directive tells RDoc which format to use.

See Directive for Specifying RDoc Source Format at RDoc::MarkupReference.

Attributes

document[W]

Overrides the content returned by parse. Use when there is no text source for this comment

file[RW]

The RDoc::TopLevel this comment was found in

format[R]

The format of this comment. Defaults to RDoc::Markup

line[RW]

Line where this Comment was written

location[RW]

The RDoc::TopLevel this comment was found in

text[R]

The text for this comment

to_s[R]

The text for this comment

Public Class Methods

new(text = nil, location = nil, language = nil) click to toggle source

Creates a new comment with text that is found in the RDoc::TopLevel location.

# File rdoc/comment.rb, line 56
def initialize text = nil, location = nil, language = nil
  @location = location
  @text     = text.nil? ? nil : text.dup
  @language = language

  @document   = nil
  @format     = 'rdoc'
  @normalized = false
end

Public Instance Methods

empty?() click to toggle source

A comment is empty if its text String is empty.

# File rdoc/comment.rb, line 128
def empty?
  @text.empty?
end

encode!(encoding) click to toggle source

HACK dubious

# File rdoc/comment.rb, line 135
def encode! encoding
  @text = String.new @text, encoding: encoding
  self
end

extract_call_seq(method) click to toggle source

Look for a ‘call-seq’ in the comment to override the normal parameter handling. The :call-seq: is indented from the baseline. All lines of the same indentation level and prefix are consumed.

For example, all of the following will be used as the :call-seq:

# :call-seq:
#   ARGF.readlines(sep=$/)     -> array
#   ARGF.readlines(limit)      -> array
#   ARGF.readlines(sep, limit) -> array
#
#   ARGF.to_a(sep=$/)     -> array
#   ARGF.to_a(limit)      -> array
#   ARGF.to_a(sep, limit) -> array

# File rdoc/comment.rb, line 95
def extract_call_seq method
  # we must handle situations like the above followed by an unindented first
  # comment.  The difficulty is to make sure not to match lines starting
  # with ARGF at the same indent, but that are after the first description
  # paragraph.
  if /^(?<S> ((?!\n)\s)*+        (?# whitespaces except newline))
       :?call-seq:
         (?<B> \g<S>(?<N>\n|\z)  (?# trailing spaces))?
       (?<seq>
         (\g<S>(?!\w)\S.*\g<N>)*
         (?>
           (?<H> \g<S>\w+        (?# ' #   ARGF' in the example above))
           .*\g<N>)?
         (\g<S>\S.*\g<N>         (?# other non-blank line))*+
         (\g<B>+(\k<H>.*\g<N>    (?# ARGF.to_a lines))++)*+
       )
       (?m:^\s*$|\z)
      /x =~ @text
    seq = $~[:seq]

    all_start, all_stop = $~.offset(0)
    @text.slice! all_start...all_stop

    seq.gsub!(/^\s*/, '')
    method.call_seq = seq
  end

  method
end

format=(format) click to toggle source

Sets the format of this comment and resets any parsed document

# File rdoc/comment.rb, line 143
def format= format
  @format = format
  @document = nil
end

normalize() click to toggle source

Normalizes the text. See RDoc::Text#normalize_comment for details

# File rdoc/comment.rb, line 157
def normalize
  return self unless @text
  return self if @normalized # TODO eliminate duplicate normalization

  @text = normalize_comment @text

  @normalized = true

  self
end

parse() click to toggle source

Parses the comment into an RDoc::Markup::Document. The parsed document is cached until the text is changed.

Calls superclass method RDoc::Text#parse

# File rdoc/comment.rb, line 179
def parse
  return @document if @document

  @document = super @text, @format
  @document.file = @location
  @document
end

remove_private() click to toggle source

Removes private sections from this comment. Private sections are flush to the comment marker and start with -- and end with ++. For C-style comments, a private marker may not start at the opening of the comment.

/*
 *--
 * private
 *++
 * public
 */

# File rdoc/comment.rb, line 200
def remove_private
  # Workaround for gsub encoding for Ruby 1.9.2 and earlier
  empty = ''
  empty = RDoc::Encoding.change_encoding empty, @text.encoding

  @text = @text.gsub(%r%^\s*([#*]?)--.*?^\s*(\1)\+\+\n?%m, empty)
  @text = @text.sub(%r%^\s*[#*]?--.*%m, '')
end

text=(text) click to toggle source

Replaces this comment’s text with text and resets the parsed document.

An error is raised if the comment contains a document but no text.

# File rdoc/comment.rb, line 214
def text= text
  raise RDoc::Error, 'replacing document-only comment is not allowed' if
    @text.nil? and @document

  @document = nil
  @text = text.nil? ? nil : text.dup
end

tomdoc?() click to toggle source

Returns true if this comment is in TomDoc format.

# File rdoc/comment.rb, line 225
def tomdoc?
  @format == 'tomdoc'
end