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Versions: 12
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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 = 'Do not freeze immutable objects, as freezing them has no ' \
'effect.'.freeze
def on_send(node)
return unless node.receiver && node.method?(:freeze) &&
immutable_literal?(node.receiver)
add_offense(node)
end
def autocorrect(node)
lambda do |corrector|
corrector.remove(node.loc.dot)
corrector.remove(node.loc.selector)
end
end
private
def immutable_literal?(node)
node = strip_parenthesis(node)
return true if node.immutable_literal?
FROZEN_STRING_LITERAL_TYPES.include?(node.type) &&
frozen_string_literals_enabled?
end
def strip_parenthesis(node)
if node.begin_type? && node.children.first
node.children.first
else
node
end
end
end
end
end
end
Version data entries
12 entries across 10 versions & 2 rubygems