class RuboCop::Cop::Style::Not
This cop checks for uses of the keyword `not` instead of `!`.
@example
# bad - parentheses are required because of op precedence x = (not something) # good x = !something
Constants
- MSG
- OPPOSITE_METHODS
Public Instance Methods
autocorrect(node)
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# File lib/rubocop/cop/style/not.rb, line 36 def autocorrect(node) range = range_with_surrounding_space(range: node.loc.selector, side: :right) if opposite_method?(node.receiver) correct_opposite_method(range, node.receiver) elsif requires_parens?(node.receiver) correct_with_parens(range, node) else correct_without_parens(range) end end
on_send(node)
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# File lib/rubocop/cop/style/not.rb, line 30 def on_send(node) return unless node.prefix_not? add_offense(node, location: :selector) end
Private Instance Methods
correct_opposite_method(range, child)
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# File lib/rubocop/cop/style/not.rb, line 61 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
correct_with_parens(range, node)
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# File lib/rubocop/cop/style/not.rb, line 69 def correct_with_parens(range, node) lambda do |corrector| corrector.replace(range, '!(') corrector.insert_after(node.source_range, ')') end end
correct_without_parens(range)
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# File lib/rubocop/cop/style/not.rb, line 76 def correct_without_parens(range) ->(corrector) { corrector.replace(range, '!') } end
opposite_method?(child)
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# File lib/rubocop/cop/style/not.rb, line 51 def opposite_method?(child) child.send_type? && OPPOSITE_METHODS.key?(child.method_name) end
requires_parens?(child)
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# File lib/rubocop/cop/style/not.rb, line 55 def requires_parens?(child) child.and_type? || child.or_type? || child.send_type? && child.binary_operation? || child.if_type? && child.ternary? end