diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/TypeOps.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/TypeOps.scala | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/dotty/tools/dotc/core/TypeOps.scala b/src/dotty/tools/dotc/core/TypeOps.scala index a0cc00b4b..8b4952489 100644 --- a/src/dotty/tools/dotc/core/TypeOps.scala +++ b/src/dotty/tools/dotc/core/TypeOps.scala @@ -48,9 +48,11 @@ trait TypeOps { this: Context => } def instParam(ps: List[Symbol], as: List[Type]): Type = - if (ps.isEmpty || as.isEmpty) throwError - else if (tparam eq ps.head) as.head - else throwError + if (as.isEmpty) tp + else if (ps.isEmpty) throwError + else if (tparam eq ps.head) + if (as.head.exists) as.head else tp + else instParam(ps.tail, as.tail) if (tparamOwner == clazz && prefixMatches) instParamFrom(basePre) else toInstance(basePre.normalizedPrefix, clazz.owner, tparam) |