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, #offset, #parent, #received_nodoc, #section, #store, #viewer

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



15
16
17
18
19
20
# File 'lib/rdoc/mixin.rb', line 15

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



10
11
12
# File 'lib/rdoc/mixin.rb', line 10

def name
  @name
end

Instance Method Details

#<=>(other) ⇒ Object

Mixins are sorted by name



25
26
27
28
29
# File 'lib/rdoc/mixin.rb', line 25

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

  name <=> other.name
end

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

:nodoc:



31
32
33
# File 'lib/rdoc/mixin.rb', line 31

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

#full_nameObject

Full name based on #module



40
41
42
43
# File 'lib/rdoc/mixin.rb', line 40

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

#hashObject

:nodoc:



45
46
47
# File 'lib/rdoc/mixin.rb', line 45

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

#inspectObject

:nodoc:



49
50
51
52
53
54
55
# File 'lib/rdoc/mixin.rb', line 49

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.



74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
# File 'lib/rdoc/mixin.rb', line 74

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.



109
110
111
112
113
# File 'lib/rdoc/mixin.rb', line 109

def store= store
  super

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

#to_sObject

:nodoc:



115
116
117
# File 'lib/rdoc/mixin.rb', line 115

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