diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/Types.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/Types.scala | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/dotty/tools/dotc/core/Types.scala b/src/dotty/tools/dotc/core/Types.scala index 794f05319..718d01ebe 100644 --- a/src/dotty/tools/dotc/core/Types.scala +++ b/src/dotty/tools/dotc/core/Types.scala @@ -2096,6 +2096,13 @@ object Types { if (lo eq tp) this else TypeAlias(tp, variance) + /** If this is an alias, a derived alias with the new variance, + * Otherwise the type itself. + */ + def withVariance(variance: Int)(implicit ctx: Context) = + if (lo ne hi) this + else derivedTypeBounds(lo, hi, variance) + def contains(tp: Type)(implicit ctx: Context) = tp match { case tp: TypeBounds => lo <:< tp.lo && tp.hi <:< hi case _ => lo <:< tp && tp <:< hi |