A Module extension in a class with #extend

Methods
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Attributes
[RW] name

Name of extension module
Class Public methods
new(name, comment)

Creates a new Extend for name with comment

Source: show | on GitHub 

# File lib/rdoc/extend.rb, line 14
def initialize(name, comment)
  super()
  @name = name
  self.comment = comment
  @module = nil # cache for module if found
end
Instance Public methods
<=>(other)

Extends are sorted by name

Source: show | on GitHub 

# File lib/rdoc/extend.rb, line 24
def <=> other
  return unless self.class === other

  name <=> other.name
end
full_name()

Full name based on module

Source: show | on GitHub 

# File lib/rdoc/extend.rb, line 39
def full_name
  m = self.module
  RDoc::ClassModule === m ? m.full_name : @name
end
module()

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

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

  • first look into the children of the current context;

  • if not found, look into the children of extension modules, in reverse extend order;

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

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

Source: show | on GitHub 

# File lib/rdoc/extend.rb, line 71
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.extends.take_while { |i| i != self }.reverse
  searched.each do |i|
    ext = i.module
    next if String === ext
    full_name = ext.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.

Source: show | on GitHub 

# File lib/rdoc/extend.rb, line 106
def store= store
  super

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