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Contents
# encoding: utf-8
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks for uses if the keyword *not* instead of !.
class Not < Cop
include IfNode
MSG = 'Use `!` instead of `not`.'.freeze
OPPOSITE_METHODS = {
:== => :!=,
:!= => :==,
:<= => :>,
:> => :<=,
:< => :>=,
:>= => :<
}.freeze
def on_send(node)
return unless node.keyword_not?
add_offense(node, :selector)
end
private
def autocorrect(node)
range = range_with_surrounding_space(node.loc.selector, :right)
child = node.children.first
if opposite_method?(child)
correct_opposite_method(range, child)
elsif requires_parens?(child)
correct_with_parens(range, node)
else
correct_without_parens(range)
end
end
def opposite_method?(child)
child.send_type? && OPPOSITE_METHODS.key?(child.method_name)
end
def requires_parens?(child)
child.and_type? || child.or_type? || child.binary_operation? ||
ternary?(child)
end
def correct_opposite_method(range, child)
lambda do |corrector|
corrector.remove(range)
corrector.replace(child.loc.selector,
OPPOSITE_METHODS[child.method_name].to_s)
end
end
def correct_with_parens(range, node)
lambda do |corrector|
corrector.replace(range, '!(')
corrector.insert_after(node.source_range, ')')
end
end
def correct_without_parens(range)
->(corrector) { corrector.replace(range, '!') }
end
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems