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Contents
# frozen_string_literal: true
module RuboCop
module Cop
# Some common code shared between `NegatedIf` and
# `NegatedWhile` cops.
module NegativeConditional
extend NodePattern::Macros
MSG = 'Favor `%<inverse>s` over `%<current>s` for negative conditions.'
private
# @!method single_negative?(node)
def_node_matcher :single_negative?, '(send !(send _ :!) :!)'
# @!method empty_condition?(node)
def_node_matcher :empty_condition?, '(begin)'
def check_negative_conditional(node, message:, &block)
condition = node.condition
return if empty_condition?(condition)
condition = condition.children.last while condition.begin_type?
return unless single_negative?(condition)
return if node.if_type? && node.else?
add_offense(node, message: message, &block)
end
end
end
end
Version data entries
235 entries across 226 versions & 23 rubygems