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[FIR] Support determining emptiness of an intersection type with type parameters' types

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This commit is contained in:
Victor Petukhov
2022-04-05 17:19:06 +03:00
committed by teamcity
parent 313da6f41e
commit 47d6236a2d
97 changed files with 1970 additions and 106 deletions
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compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/ResolutionStages.kt
+3 -2
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@@ -41,6 +41,7 @@ import org.jetbrains.kotlin.resolve.calls.tower.CandidateApplicability
import org.jetbrains.kotlin.resolve.deprecation.DeprecationLevelValue
import org.jetbrains.kotlin.types.AbstractNullabilityChecker
import org.jetbrains.kotlin.types.TypeApproximatorConfiguration
import org.jetbrains.kotlin.types.isDefinitelyEmpty
import org.jetbrains.kotlin.util.OperatorNameConventions
abstract class ResolutionStage {
@@ -579,12 +580,12 @@ internal object CheckLowPriorityInOverloadResolution : CheckerStage() {
internal object CheckIncompatibleTypeVariableUpperBounds : ResolutionStage() {
override suspend fun check(candidate: Candidate, callInfo: CallInfo, sink: CheckerSink, context: ResolutionContext) =
with(candidate.system.asConstraintSystemCompleterContext()) {
val typeVariables = candidate.system.notFixedTypeVariables.values
val typeVariables = candidate.system.notFixedTypeVariables.values.takeIf { it.isNotEmpty() } ?: return
for (variableWithConstraints in typeVariables) {
val upperTypes = variableWithConstraints.constraints.extractUpperTypes()
if (upperTypes.isEmptyIntersection()) {
if (upperTypes.computeEmptyIntersectionTypeKind().isDefinitelyEmpty()) {
sink.yieldDiagnostic(
@Suppress("UNCHECKED_CAST")
InferredEmptyIntersectionDiagnostic(