//> using options -source:future-migration -deprecation -Werror
scala> import scala.util._
-- Migration Warning: ----------------------------------------------------------
1 |import scala.util._
  |                  ^
  |         `_` is no longer supported for a wildcard import; use `*` instead
No warnings can be incurred under -Werror
1 warning found
1 error found
scala> extension (x: Int) def foo(y: Int) = x + y
def foo(x: Int)(y: Int): Int
scala> 2 foo 4
-- Migration Warning: ----------------------------------------------------------
1 |2 foo 4
  |  ^^^
  |Alphanumeric method foo is not declared infix; it should not be used as infix operator.
  |Instead, use method syntax .foo(...) or backticked identifier `foo`.
No warnings can be incurred under -Werror
1 warning found
1 error found
