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Contents
# Use this for a thing that damages.
#
# Example:
# class Rocket
# it_is Damaging
#
# damage { rand(10) + 5 }
# end
#
# OR
# class Rocket
# it_is Damaging
#
# damage 15
# end
#
# OR
#
# class Rocket
# it_is Damaging
#
# def damage
# # Define your own damage method.
# end
# end
#
module Damaging extend Trait
class DamageMissingError < RuntimeError
def initialize
super <<-MESSAGE
In a Damaging thing, you need to define method
damage damage = nil, &block
with params
damage 13 # some value
or
damage { 13 + rand(7) } # some block
to define how much damage the thing does.
MESSAGE
end
end
def self.included klass
klass.extend ClassMethods
end
def initialize window
raise DamageMissingError.new unless respond_to?(:damage)
super window
end
module ClassMethods
def damage damage = nil, &block
block = lambda { damage } unless block_given?
define_method :damage, &block
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems