diff options
| -rw-r--r-- | src/compiler/scala/reflect/internal/Kinds.scala | 10 | ||||
| -rw-r--r-- | test/files/pos/t5020.scala | 19 |
2 files changed, 23 insertions, 6 deletions
diff --git a/src/compiler/scala/reflect/internal/Kinds.scala b/src/compiler/scala/reflect/internal/Kinds.scala index 15fcb5f94d..e675be43dc 100644 --- a/src/compiler/scala/reflect/internal/Kinds.scala +++ b/src/compiler/scala/reflect/internal/Kinds.scala @@ -110,10 +110,7 @@ trait Kinds { ): List[(Type, Symbol, KindErrors)] = { // instantiate type params that come from outside the abstract type we're currently checking - def transform(tp: Type, clazz: Symbol): Type = - tp.asSeenFrom(pre, clazz) - def transformedBounds(p: Symbol, o: Symbol) = - transform(p.info.instantiateTypeParams(tparams, targs).bounds, o) + def transform(tp: Type, clazz: Symbol): Type = tp.asSeenFrom(pre, clazz) // check that the type parameters hkargs to a higher-kinded type conform to the // expected params hkparams @@ -131,6 +128,7 @@ trait Kinds { // @M sometimes hkargs != arg.typeParams, the symbol and the type may // have very different type parameters val hkparams = param.typeParams + def kindCheck(cond: Boolean, f: KindErrors => KindErrors) { if (!cond) kindErrors = f(kindErrors) @@ -160,8 +158,8 @@ trait Kinds { // conceptually the same. Could also replace the types by // polytypes, but can't just strip the symbols, as ordering // is lost then. - val declaredBounds = transformedBounds(hkparam, paramowner) - val declaredBoundsInst = bindHKParams(declaredBounds) + val declaredBounds = transform(hkparam.info.instantiateTypeParams(tparams, targs).bounds, paramowner) + val declaredBoundsInst = transform(bindHKParams(declaredBounds), owner) val argumentBounds = transform(hkarg.info.bounds, owner) kindCheck(declaredBoundsInst <:< argumentBounds, _ strictnessError (hkarg -> hkparam)) diff --git a/test/files/pos/t5020.scala b/test/files/pos/t5020.scala new file mode 100644 index 0000000000..06f7723f9f --- /dev/null +++ b/test/files/pos/t5020.scala @@ -0,0 +1,19 @@ +package a { + sealed trait GenericList[U, M[_ <: U]] { + type Transformed[N[MMA <: U]] <: GenericList[U, N] + } + + trait GenericCons[U, M[_ <: U], T <: GenericList[U, M]] extends GenericList[U, M] { + type Transformed[N[MMB <: U]] = GenericCons[U, N, GenericList[U, M]#Transformed[N]] + } +} + +package b { + sealed trait GenericList[L, M[_ >: L]] { + type Transformed[N[MMA >: L]] <: GenericList[L, N] + } + + trait GenericCons[L, M[_ >: L], T <: GenericList[L, M]] extends GenericList[L, M] { + type Transformed[N[MMB >: L]] = GenericCons[L, N, T#Transformed[N]] + } +}
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