lighttroupe/luz

# Example Usage:
#
#        class Example
#            boolean_accessor :is_understood        # starts false
#
#            def initialize
#                is_understood!
#            end

class Module
    def boolean_accessor(*signals)
        signals.each { |signal|
            module_eval( "def #{signal}() @#{signal} == true ; end", __FILE__, __LINE__ )
            module_eval( "def #{signal}?() @#{signal} == true ; end", __FILE__, __LINE__ )
            module_eval( "def is_#{signal}?() @#{signal} == true ; end", __FILE__, __LINE__ )
            module_eval( "def #{signal}=(value) @#{signal} = value ; end", __FILE__, __LINE__ )

            # Chainable (return self)
            module_eval( "def set_#{signal}(value) @#{signal} = value ; self ; end", __FILE__, __LINE__ )
            module_eval( "def toggle_#{signal}() self.#{signal} = !self.#{signal}? ; self ;end", __FILE__, __LINE__ )
            module_eval( "def toggle_#{signal}!() self.#{signal} = !self.#{signal}? ; self ; end", __FILE__, __LINE__ )
            module_eval( "def #{signal}!() self.#{signal} = true ; self ; end", __FILE__, __LINE__ )
            module_eval( "def not_#{signal}!() self.#{signal} = false ; self ; end", __FILE__, __LINE__ )
        }
    end
end