class RuboCop::Cop::Lint::RedundantWithIndex


end
v
ary.each do |v|
# good
end
v
ary.each.with_index do |v|
# bad
end
v
ary.each do |v|
# good
end
v
ary.each_with_index do |v|
# bad
@example
Checks for redundant ‘with_index`.

def message(node) 

def message(node)
  if node.method?(:each_with_index)
    MSG_EACH_WITH_INDEX
  else
    MSG_WITH_INDEX
  end
end

def on_block(node) 

def on_block(node)
  return unless (send = redundant_with_index?(node))
  range = with_index_range(send)
  add_offense(range, message: message(send)) do |corrector|
    if send.method?(:each_with_index)
      corrector.replace(send.loc.selector, 'each')
    else
      corrector.remove(range)
      corrector.remove(send.loc.dot)
    end
  end
end

def with_index_range(send) 

def with_index_range(send)
  range_between(send.loc.selector.begin_pos, send.loc.expression.end_pos)
end