Sha256: fcebb7fe6d03e7f89ed2a4c80f48cd921446d06b032e6a862d607b1d49c9bcfa
Contents?: true
Size: 1.28 KB
Versions: 39
Compression:
Stored size: 1.28 KB
Contents
# These class attributes behave something like the class
# inheritable accessors. But instead of copying the hash over at
# the time the subclass is first defined, the accessors simply
# delegate to their superclass unless they have been given a
# specific value. This stops the strange situation where values
# set after class definition don't get applied to subclasses.
class Class
def superclass_delegating_reader(*names)
class_name_to_stop_searching_on = self.superclass.name.blank? ? "Object" : self.superclass.name
names.each do |name|
class_eval <<-EOS
def self.#{name}
if defined?(@#{name})
@#{name}
elsif superclass < #{class_name_to_stop_searching_on} && superclass.respond_to?(:#{name})
superclass.#{name}
end
end
def #{name}
self.class.#{name}
end
def self.#{name}?
!!#{name}
end
def #{name}?
!!#{name}
end
EOS
end
end
def superclass_delegating_writer(*names)
names.each do |name|
class_eval <<-EOS
def self.#{name}=(value)
@#{name} = value
end
EOS
end
end
def superclass_delegating_accessor(*names)
superclass_delegating_reader(*names)
superclass_delegating_writer(*names)
end
end
Version data entries
39 entries across 38 versions & 13 rubygems