lib/rubocop/cop/lint/empty_in_pattern.rb
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# Checks for the presence of `in` pattern branches without a body.
#
# @example
#
# # bad
# case condition
# in [a]
# do_something
# in [a, b]
# end
#
# # good
# case condition
# in [a]
# do_something
# in [a, b]
# nil
# end
#
# @example AllowComments: true (default)
#
# # good
# case condition
# in [a]
# do_something
# in [a, b]
# # noop
# end
#
# @example AllowComments: false
#
# # bad
# case condition
# in [a]
# do_something
# in [a, b]
# # noop
# end
#
class EmptyInPattern < Base
extend TargetRubyVersion
include CommentsHelp
MSG = 'Avoid `in` branches without a body.'
minimum_target_ruby_version 2.7
def on_case_match(node)
node.in_pattern_branches.each do |branch|
next if branch.body
next if cop_config['AllowComments'] && contains_comments?(branch)
add_offense(branch)
end
end
end
end
end
end