class RuboCop::Cop::Lint::MultipleComparison
In math and Python, we can use ‘x < y < z` style comparison to compare multiple value. However, we can’t use the comparison in Ruby. However, the comparison is not syntax error. This cop checks the bad usage of comparison operators.
@example
# bad x < y < z 10 <= x <= 20 # good x < y && y < z 10 <= x && x <= 20
Constants
- COMPARISON_METHODS
- MSG
- RESTRICT_ON_SEND
- SET_OPERATION_OPERATORS
Public Instance Methods
Source
# File lib/rubocop/cop/lint/multiple_comparison.rb, line 33 def on_send(node) return unless (center = multiple_compare?(node)) # It allows multiple comparison using `&`, `|`, and `^` set operation operators. # e.g. `x >= y & y < z` return if center.send_type? && SET_OPERATION_OPERATORS.include?(center.method_name) add_offense(node) do |corrector| new_center = "#{center.source} && #{center.source}" corrector.replace(center, new_center) end end