diff options
Diffstat (limited to 'src/dotty/tools/dotc/core')
| -rw-r--r-- | src/dotty/tools/dotc/core/Types.scala | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/dotty/tools/dotc/core/Types.scala b/src/dotty/tools/dotc/core/Types.scala index 89facfee5..827e851a9 100644 --- a/src/dotty/tools/dotc/core/Types.scala +++ b/src/dotty/tools/dotc/core/Types.scala @@ -117,14 +117,15 @@ object Types { } /** A type T is a legal prefix in a type selection T#A if - * T is stable or T contains no abstract types + * T is stable or T contains no abstract types except possibly A. * !!! Todo: What about non-final vals that contain abstract types? */ - final def isLegalPrefix(implicit ctx: Context): Boolean = + final def isLegalPrefixFor(selector: Name)(implicit ctx: Context): Boolean = isStable || { val absTypeNames = memberNames(abstractTypeNameFilter) if (absTypeNames.nonEmpty) typr.println(s"abstract type members of ${this.showWithUnderlying()}: $absTypeNames") - absTypeNames.isEmpty + absTypeNames.isEmpty || + absTypeNames.head == selector && absTypeNames.tail.isEmpty } /** Is this type guaranteed not to have `null` as a value? |