class RDoc::Mixin

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

Attributes

Name of included module

Public Class Methods

Creates a new Mixin for name with comment

Calls superclass method RDoc::CodeObject::new

# File lib/rdoc/code_object/mixin.rb, line 17
def initialize(name, comment)
  super()
  @name = name
  self.comment = comment
  @module = nil # cache for module if found
end

Public Instance Methods

<=> (other)

Mixins are sorted by name

# File lib/rdoc/code_object/mixin.rb, line 27
def <=>(other)
  return unless self.class === other

  name <=> other.name
end

full_name ()

Full name based on module

# File lib/rdoc/code_object/mixin.rb, line 42
def full_name
  m = self.module
  ClassModule === m ? m.full_name : @name
end

module ()

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.

The Ruby parser passes an already-resolved full-path name, so most of this logic only runs for the C parser, which passes the unresolved local name.

# File lib/rdoc/code_object/mixin.rb, line 79
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)

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

Calls superclass method RDoc::CodeObject#store=

# File lib/rdoc/code_object/mixin.rb, line 114
def store=(store)
  super

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