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Diffstat (limited to 'src/dotty/tools/dotc/core/Decorators.scala')
-rw-r--r-- | src/dotty/tools/dotc/core/Decorators.scala | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/dotty/tools/dotc/core/Decorators.scala b/src/dotty/tools/dotc/core/Decorators.scala index eb287f411..ca601cddf 100644 --- a/src/dotty/tools/dotc/core/Decorators.scala +++ b/src/dotty/tools/dotc/core/Decorators.scala @@ -105,6 +105,12 @@ object Decorators { else ys.nonEmpty && loop(xs.tail, ys.tail) loop(xs, ys) } + + /** Union on lists seen as sets */ + def | (ys: List[T]): List[T] = xs ++ (ys filterNot (xs contains _)) + + /** Intersection on lists seen as sets */ + def & (ys: List[T]): List[T] = xs filter (ys contains _) } implicit class ListOfListDecorator[T](val xss: List[List[T]]) extends AnyVal { |