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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop check for uses of Object#freeze on immutable objects.
#
# @example
# # bad
# CONST = 1.freeze
#
# # good
# CONST = 1
class RedundantFreeze < Cop
include FrozenStringLiteral
MSG = 'Freezing immutable objects is pointless.'.freeze
def_node_matcher :freezing?, '(send $_ :freeze)'
def on_send(node)
freezing?(node) do |receiver|
return unless immutable_literal?(receiver)
add_offense(node, :expression)
end
end
def autocorrect(node)
lambda do |corrector|
corrector.remove(node.loc.dot)
corrector.remove(node.loc.selector)
end
end
private
def immutable_literal?(node)
return false unless node
return true if node.immutable_literal?
FROZEN_STRING_LITERAL_TYPES.include?(node.type) &&
frozen_string_literals_enabled?(processed_source)
end
end
end
end
end
Version data entries
8 entries across 8 versions & 2 rubygems