frozen_string_literal: true

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

Methods
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Attributes
[RW] name

Name of included module

Class Public methods
new(name, comment)

Creates a new Mixin for name with comment

# 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 Public methods
<=>(other)

Mixins are sorted by name

# File lib/rdoc/mixin.rb, line 26
def <=> other
  return unless self.class === other

  name <=> other.name
end
full_name()

Full name based on module

# File lib/rdoc/mixin.rb, line 41
def full_name
  m = self.module
  RDoc::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.

# 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)

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

# File lib/rdoc/mixin.rb, line 110
def store= store
  super

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