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##
# A Mixin adds features from a module into another context. RDoc::Include and
# RDoc::Extend are both mixins.
class RDoc::Mixin < RDoc::CodeObject
##
# Name of included module
attr_accessor :name
##
# Creates a new Mixin for +name+ with +comment+
def initialize(name, comment)
super()
@name = name
self.comment = comment
@module = nil # cache for module if found
end
##
# Mixins are sorted by name
def <=> other
return unless self.class === other
name <=> other.name
end
def == other # :nodoc:
self.class === other and @name == other.name
end
alias eql? == # :nodoc:
##
# Full name based on #module
def full_name
m = self.module
RDoc::ClassModule === m ? m.full_name : @name
end
def hash # :nodoc:
[@name, self.module].hash
end
def inspect # :nodoc:
"#<%s:0x%x %s.%s %s>" % [
self.class,
object_id,
parent_name, self.class.name.downcase, @name,
]
end
##
# 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 <code>O(n!)</code> 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.
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
##
# Sets the store for this class or module and its contained code objects.
def store= store
super
@file = @store.add_file @file.full_name if @file
end
def to_s # :nodoc:
"#{self.class.name.downcase} #@name in: #{parent}"
end
end