attr_bool

https://github.com/esotericpig/attr_bool

Finally attr_accessor & attr_reader with question marks for booleans!? Simply use: attr_accessor?, attr_reader?, attr_bool, attr_bool?. Default values can also be passed in as the last argument or with the 'default: ' keyword argument. In a Module/Class, extend 'AttrBool::Ext', or in the file, require 'attr_bool/core_ext'.