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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks for uses of class variables. Offenses
# are signaled only on assignment to class variables to
# reduce the number of offenses that would be reported.
#
# You have to be careful when setting a value for a class
# variable; if a class has been inherited, changing the
# value of a class variable also affects the inheriting
# classes. This means that it's almost always better to
# use a class instance variable instead.
#
# @example
# # bad
# class A
# @@test = 10
# end
#
# # good
# class A
# @test = 10
# end
#
# class A
# def test
# @@test # you can access class variable without offense
# end
# end
#
class ClassVars < Cop
MSG = 'Replace class var %<class_var>s with a class ' \
'instance var.'.freeze
def on_cvasgn(node)
add_offense(node, location: :name)
end
def message(node)
class_var, = *node
format(MSG, class_var: class_var)
end
end
end
end
end
Version data entries
6,885 entries across 6,879 versions & 25 rubygems