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tests/cases/compiler/intersectionWithConflictingPrivates.ts(5,4): error TS2339: Property 'y' does not exist on type 'never'.
The intersection 'A & B' was reduced to 'never' because property 'x' exists in multiple constituents and is private in some.
tests/cases/compiler/intersectionWithConflictingPrivates.ts(6,1): error TS2322: Type '{}' is not assignable to type 'never'.
The intersection 'A & B' was reduced to 'never' because property 'x' exists in multiple constituents and is private in some.
==== tests/cases/compiler/intersectionWithConflictingPrivates.ts (2 errors) ====
class A { private x: unknown; y?: string; }
class B { private x: unknown; y?: string; }
declare let ab: A & B;
ab.y = 'hello';
~
!!! error TS2339: Property 'y' does not exist on type 'never'.
!!! error TS2339: The intersection 'A & B' was reduced to 'never' because property 'x' exists in multiple constituents and is private in some.
ab = {};
~~
!!! error TS2322: Type '{}' is not assignable to type 'never'.
!!! error TS2322: The intersection 'A & B' was reduced to 'never' because property 'x' exists in multiple constituents and is private in some.
function f1(node: A | B) {
if (node instanceof A || node instanceof A) {
node; // A
}
else {
node; // B
}
node; // A | B
}
// Repro from #37659
abstract class ViewNode { }
abstract class ViewRefNode extends ViewNode { }
abstract class ViewRefFileNode extends ViewRefNode { }
class CommitFileNode extends ViewRefFileNode {
private _id: any;
}
class ResultsFileNode extends ViewRefFileNode {
private _id: any;
}
class StashFileNode extends CommitFileNode {
private _id2: any;
}
class StatusFileNode extends ViewNode {
private _id: any;
}
class Foo {
private async foo(node: CommitFileNode | ResultsFileNode | StashFileNode) {
if (
!(node instanceof CommitFileNode) &&
!(node instanceof StashFileNode) &&
!(node instanceof ResultsFileNode)
) {
return;
}
await this.bar(node);
}
private async bar(node: CommitFileNode | ResultsFileNode | StashFileNode | StatusFileNode, options?: {}) {
return Promise.resolve(undefined);
}
}
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