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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop identifies places where `lstrip.rstrip` can be replaced by
# `strip`.
#
# @example
# # bad
# 'abc'.lstrip.rstrip
# 'abc'.rstrip.lstrip
#
# # good
# 'abc'.strip
class Strip < Base
include RangeHelp
extend AutoCorrector
MSG = 'Use `strip` instead of `%<methods>s`.'
RESTRICT_ON_SEND = %i[lstrip rstrip].freeze
# @!method lstrip_rstrip(node)
def_node_matcher :lstrip_rstrip, <<~PATTERN
{(send $(send _ $:rstrip) $:lstrip)
(send $(send _ $:lstrip) $:rstrip)}
PATTERN
def on_send(node)
lstrip_rstrip(node) do |first_send, method_one, method_two|
range = range_between(first_send.loc.selector.begin_pos, node.source_range.end_pos)
message = format(MSG, methods: "#{method_one}.#{method_two}")
add_offense(range, message: message) do |corrector|
corrector.replace(range, 'strip')
end
end
end
end
end
end
end
Version data entries
41 entries across 41 versions & 6 rubygems