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Revert "Allow variance annotations on generic references (#56418)" (#59793)

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This commit is contained in:
Mateusz Burzyński
2024-09-04 01:08:13 +02:00
committed by GitHub
parent fe2cb8ebaa
commit 29d92edd1c
6 changed files with 348 additions and 85 deletions
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src/compiler/checker.ts
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@@ -41147,7 +41147,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const modifiers = getTypeParameterModifiers(typeParameter) & (ModifierFlags.In | ModifierFlags.Out);
if (modifiers) {
const symbol = getSymbolOfDeclaration(node.parent);
if (isTypeAliasDeclaration(node.parent) && !(getObjectFlags(getDeclaredTypeOfSymbol(symbol)) & (ObjectFlags.Reference | ObjectFlags.Anonymous | ObjectFlags.Mapped))) {
if (isTypeAliasDeclaration(node.parent) && !(getObjectFlags(getDeclaredTypeOfSymbol(symbol)) & (ObjectFlags.Anonymous | ObjectFlags.Mapped))) {
error(node, Diagnostics.Variance_annotations_are_only_supported_in_type_aliases_for_object_function_constructor_and_mapped_types);
}
else if (modifiers === ModifierFlags.In || modifiers === ModifierFlags.Out) {