diff options
Diffstat (limited to 'src/dotty/tools/dotc/core')
| -rw-r--r-- | src/dotty/tools/dotc/core/TypeApplications.scala | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/src/dotty/tools/dotc/core/TypeApplications.scala b/src/dotty/tools/dotc/core/TypeApplications.scala index 4080d74dc..9e5c3d5a5 100644 --- a/src/dotty/tools/dotc/core/TypeApplications.scala +++ b/src/dotty/tools/dotc/core/TypeApplications.scala @@ -51,23 +51,21 @@ class TypeApplications(val self: Type) extends AnyVal { } } /** The type parameters of the underlying class. - * This is like `typeParams`, except for 4 differences. + * This is like `typeParams`, except for 3 differences. * First, it does not adjust type parameters in refined types. I.e. type arguments * do not remove corresponding type parameters. - * Second, it will return Nil instead of forcing a symbol, in order to rule - * out CyclicReference exceptions. - * Third, it will return Nil for BoundTypes because we might get a NullPointer exception + * Second, it will return Nil for BoundTypes because we might get a NullPointer exception * on PolyParam#underlying otherwise (demonstrated by showClass test). - * Fourth, it won't return higher-kinded type parameters. + * Third, it won't return higher-kinded type parameters. */ final def safeUnderlyingTypeParams(implicit ctx: Context): List[TypeSymbol] = { def ifCompleted(sym: Symbol): Symbol = if (sym.isCompleted) sym else NoSymbol self match { case tp: ClassInfo => - if (tp.cls.isCompleted) tp.cls.typeParams else Nil + tp.cls.typeParams case tp: TypeRef => val tsym = tp.typeSymbol - if (tsym.isClass && tsym.isCompleted) tsym.typeParams + if (tsym.isClass) tsym.typeParams else if (tsym.isAliasType) tp.underlying.safeUnderlyingTypeParams else Nil case tp: BoundType => |