Sha256: 5a37426d23c0d9916f7896cc010b6dcd1776f235f1b1966ab1fe9cee5cc7e880
Contents?: true
Size: 1.76 KB
Versions: 18
Compression:
Stored size: 1.76 KB
Contents
class Class
# Taken from extlib but uses a full Marshall.dump rather than just a dup.
# This may not work for some data types. The data must be marshalable to use this method.
#
# Defines class-level inheritable attribute reader. Attributes are available to subclasses,
# each subclass has a copy of parent's attribute.
#
# @param *syms<Array[#to_s]> Array of attributes to define inheritable reader for.
# @return <Array[#to_s]> Array of attributes converted into inheritable_readers.
#
# @api public
#
# @todo Do we want to block instance_reader via :instance_reader => false
# @todo It would be preferable that we do something with a Hash passed in
# (error out or do the same as other methods above) instead of silently
# moving on). In particular, this makes the return value of this function
# less useful.
def deep_copy_class_inheritable_reader(*ivars)
instance_reader = ivars.pop[:reader] if ivars.last.is_a?(Hash)
ivars.each do |ivar|
self.class_eval <<-RUBY, __FILE__, __LINE__ + 1
def self.#{ivar}
return @#{ivar} if self == #{self} || defined?(@#{ivar})
ivar = superclass.#{ivar}
return nil if ivar.nil? && !#{self}.instance_variable_defined?("@#{ivar}")
@#{ivar} = ivar && !ivar.is_a?(Module) && !ivar.is_a?(Numeric) ? Marshal.load(Marshal.dump(ivar)) : ivar
end
RUBY
unless instance_reader == false
self.class_eval <<-RUBY, __FILE__, __LINE__ + 1
def #{ivar}
self.class.#{ivar}
end
RUBY
end # unless
end # ivars.each
end # self.deep_inheritable_reader
def deep_copy_class_inheritable_accessor(*ivars)
deep_copy_class_inheritable_reader(*ivars)
class_inheritable_writer(*ivars)
end
end # Class
Version data entries
18 entries across 18 versions & 2 rubygems