Class: RDoc::Mixin

Inherits:
CodeObject show all
Defined in:
lib/rdoc/mixin.rb

Overview

A Mixin adds features from a module into another context. RDoc::Include and RDoc::Extend are both mixins.

Direct Known Subclasses

Extend, Include

Constant Summary

Constants included from Text

Text::MARKUP_FORMAT, Text::TO_HTML_CHARACTERS

Instance Attribute Summary collapse

Attributes inherited from CodeObject

#comment, #document_children, #document_self, #done_documenting, #file, #force_documentation, #line, #metadata, #parent, #received_nodoc, #section, #store, #viewer

Attributes included from Text

#language

Instance Method Summary collapse

Methods inherited from CodeObject

#display?, #documented?, #each_parent, #file_name, #full_name=, #ignore, #ignored?, #initialize_visibility, #options, #parent_file_name, #parent_name, #record_location, #start_doc, #stop_doc, #suppress, #suppressed?

Methods included from Generator::Markup

#aref_to, #as_href, #cvs_url, #description, #formatter

Methods included from Text

encode_fallback, #expand_tabs, #flush_left, #markup, #normalize_comment, #parse, #snippet, #strip_hashes, #strip_newlines, #strip_stars, #to_html, #wrap

Constructor Details

#initialize(name, comment) ⇒ Mixin

Creates a new Mixin for name with comment


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# File 'lib/rdoc/mixin.rb', line 16

def initialize(name, comment)
  super()
  @name = name
  self.comment = comment
  @module = nil # cache for module if found
end

Instance Attribute Details

#nameObject

Name of included module


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# File 'lib/rdoc/mixin.rb', line 11

def name
  @name
end

Instance Method Details

#<=>(other) ⇒ Object

Mixins are sorted by name


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# File 'lib/rdoc/mixin.rb', line 26

def <=> other
  return unless self.class === other

  name <=> other.name
end

#==(other) ⇒ Object Also known as: eql?

:nodoc:


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# File 'lib/rdoc/mixin.rb', line 32

def == other # :nodoc:
  self.class === other and @name == other.name
end

#full_nameObject

Full name based on #module


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# File 'lib/rdoc/mixin.rb', line 41

def full_name
  m = self.module
  RDoc::ClassModule === m ? m.full_name : @name
end

#hashObject

:nodoc:


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# File 'lib/rdoc/mixin.rb', line 46

def hash # :nodoc:
  [@name, self.module].hash
end

#inspectObject

:nodoc:


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# File 'lib/rdoc/mixin.rb', line 50

def inspect # :nodoc:
  "#<%s:0x%x %s.%s %s>" % [
    self.class,
    object_id,
    parent_name, self.class.name.downcase, @name,
  ]
end

#moduleObject

Attempts to locate the included module object. Returns the name if not known.

The scoping rules of Ruby to resolve the name of an included module are:

  • first look into the children of the current context;

  • if not found, look into the children of included modules, in reverse inclusion order;

  • if still not found, go up the hierarchy of names.

This method has O(n!) behavior when the module calling include is referencing nonexistent modules. Avoid calling #module until after all the files are parsed. This behavior is due to ruby's constant lookup behavior.

As of the beginning of October, 2011, no gem includes nonexistent modules.


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# File 'lib/rdoc/mixin.rb', line 75

def module
  return @module if @module

  # search the current context
  return @name unless parent
  full_name = parent.child_name(@name)
  @module = @store.modules_hash[full_name]
  return @module if @module
  return @name if @name =~ /^::/

  # search the includes before this one, in reverse order
  searched = parent.includes.take_while { |i| i != self }.reverse
  searched.each do |i|
    inc = i.module
    next if String === inc
    full_name = inc.child_name(@name)
    @module = @store.modules_hash[full_name]
    return @module if @module
  end

  # go up the hierarchy of names
  up = parent.parent
  while up
    full_name = up.child_name(@name)
    @module = @store.modules_hash[full_name]
    return @module if @module
    up = up.parent
  end

  @name
end

#store=(store) ⇒ Object

Sets the store for this class or module and its contained code objects.


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# File 'lib/rdoc/mixin.rb', line 110

def store= store
  super

  @file = @store.add_file @file.full_name if @file
end

#to_sObject

:nodoc:


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# File 'lib/rdoc/mixin.rb', line 116

def to_s # :nodoc:
  "#{self.class.name.downcase} #@name in: #{parent}"
end