class RuboCop::Cop::Performance::ReverseEach

items.reverse_each
# good
items.reverse.each
# bad
@example
—-
[1, 2, 3].reverse_each {} #=> [1, 2, 3]
[1, 2, 3].reverse.each {} #=> [3, 2, 1]
—-
[source,ruby]

If the return value is used, it will not be detected because the result will be different.
Identifies usages of ‘reverse.each` and change them to use `reverse_each` instead.

def offense_range(node) 

def offense_range(node)
  range_between(node.children.first.loc.selector.begin_pos, node.loc.selector.end_pos)
end

def on_send(node) 

def on_send(node)
  return if use_return_value?(node)
  reverse_each?(node) do
    range = offense_range(node)
    add_offense(range) do |corrector|
      corrector.replace(range, 'reverse_each')
    end
  end
end

def use_return_value?(node) 

def use_return_value?(node)
  !!node.ancestors.detect do |ancestor|
    ancestor.assignment? || ancestor.send_type? || ancestor.return_type?
  end
end