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[FE] Prohibit sealed fun interfaces

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#KT-44947 Fixed
This commit is contained in:
Dmitriy Novozhilov
2021-02-16 12:50:51 +03:00
parent cdf7de5524
commit 5ce36a528e
6 changed files with 84 additions and 2 deletions
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compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/SealedInterfaceAllowedChecker.kt
+8 -2
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@@ -14,10 +14,16 @@ import org.jetbrains.kotlin.psi.KtDeclaration
object SealedInterfaceAllowedChecker : DeclarationChecker {
override fun check(declaration: KtDeclaration, descriptor: DeclarationDescriptor, context: DeclarationCheckerContext) {
if (context.languageVersionSettings.supportsFeature(LanguageFeature.SealedInterfaces)) return
if (descriptor !is ClassDescriptor) return
if (descriptor.kind != ClassKind.INTERFACE) return
val keyword = declaration.modifierList?.getModifier(KtTokens.SEALED_KEYWORD) ?: return
context.trace.report(Errors.UNSUPPORTED_FEATURE.on(keyword, LanguageFeature.SealedInterfaces to context.languageVersionSettings))
val diagnostic = if (context.languageVersionSettings.supportsFeature(LanguageFeature.SealedInterfaces)) {
if (descriptor.isFun) {
Errors.UNSUPPORTED.on(keyword, "sealed fun interfaces")
} else return
} else {
Errors.UNSUPPORTED_FEATURE.on(keyword, LanguageFeature.SealedInterfaces to context.languageVersionSettings)
}
context.trace.report(diagnostic)
}
}