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Treat mixed (subtyping, inference) sub-types properly in CST

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This commit is contained in:
Simon Ogorodnik
2021-12-13 16:46:23 +03:00
committed by teamcity
parent b3943f5ab6
commit 8b23d86bd9
1 changed files with 5 additions and 13 deletions
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compiler/resolution.common/src/org/jetbrains/kotlin/resolve/calls/NewCommonSuperTypeCalculator.kt
+5 -13
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@@ -204,28 +204,20 @@ object NewCommonSuperTypeCalculator {
if (types.size == 1) return types.single()
val nonTypeVariables = types.filter { !it.isStubTypeForVariableInSubtyping() && !isCapturedStubTypeForVariableInSubtyping(it) }
if (nonTypeVariables.size == 1) return nonTypeVariables.single()
assert(nonTypeVariables.isNotEmpty()) {
"There should be at least one non-stub type to compute common supertype but there are: $types"
}
val (builderInferenceStubTypes, nonBuilderInferenceStubTypes) = types.partition { it.isStubTypeForBuilderInference() }
val areAllNonBuilderInferenceStubTypesNothing =
nonBuilderInferenceStubTypes.isNotEmpty() && nonBuilderInferenceStubTypes.all { it.isNothing() }
val (builderInferenceStubTypes, nonStubTypes) = nonTypeVariables.partition { it.isStubTypeForBuilderInference() }
val areAllNonStubTypesNothing =
nonStubTypes.isNotEmpty() && nonStubTypes.all { it.isNothing() }
if (nonBuilderInferenceStubTypes.size == 1 && !areAllNonBuilderInferenceStubTypesNothing)
return nonBuilderInferenceStubTypes.single()
if (builderInferenceStubTypes.isNotEmpty()) {
// Common super type between any non stub type (except Nothing) and stub one is always Any?
if (nonBuilderInferenceStubTypes.isNotEmpty() && !areAllNonBuilderInferenceStubTypesNothing) {
return nullableAnyType()
}
if (builderInferenceStubTypes.isNotEmpty() && (nonStubTypes.isEmpty() || areAllNonStubTypesNothing)) {
return commonSuperTypeForBuilderInferenceStubTypes(builderInferenceStubTypes, stateStubTypesNotEqual)
}
val uniqueTypes = uniquify(nonTypeVariables, stateStubTypesNotEqual)
val uniqueTypes = uniquify(nonStubTypes, stateStubTypesNotEqual)
if (uniqueTypes.size == 1) return uniqueTypes.single()
val explicitSupertypes = filterSupertypes(uniqueTypes, stateStubTypesNotEqual)