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| 1 | +=== tests/cases/conformance/expressions/assignmentOperator/assignmentGenericLookupTypeNarrowing.ts === |
| 2 | +// Repro from #26130 |
| 3 | + |
| 4 | +let mappedObject: {[K in "foo"]: null | {x: string}} = {foo: {x: "hello"}}; |
| 5 | +>mappedObject : Symbol(mappedObject, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 3)) |
| 6 | +>K : Symbol(K, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 20)) |
| 7 | +>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 41)) |
| 8 | +>foo : Symbol(foo, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 56)) |
| 9 | +>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 62)) |
| 10 | + |
| 11 | +declare function foo<T>(x: T): null | T; |
| 12 | +>foo : Symbol(foo, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 75)) |
| 13 | +>T : Symbol(T, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 21)) |
| 14 | +>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 24)) |
| 15 | +>T : Symbol(T, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 21)) |
| 16 | +>T : Symbol(T, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 21)) |
| 17 | + |
| 18 | +function bar<K extends "foo">(key: K) { |
| 19 | +>bar : Symbol(bar, Decl(assignmentGenericLookupTypeNarrowing.ts, 3, 40)) |
| 20 | +>K : Symbol(K, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 13)) |
| 21 | +>key : Symbol(key, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 30)) |
| 22 | +>K : Symbol(K, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 13)) |
| 23 | + |
| 24 | + const element = foo(mappedObject[key]); |
| 25 | +>element : Symbol(element, Decl(assignmentGenericLookupTypeNarrowing.ts, 6, 7)) |
| 26 | +>foo : Symbol(foo, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 75)) |
| 27 | +>mappedObject : Symbol(mappedObject, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 3)) |
| 28 | +>key : Symbol(key, Decl(assignmentGenericLookupTypeNarrowing.ts, 5, 30)) |
| 29 | + |
| 30 | + if (element == null) |
| 31 | +>element : Symbol(element, Decl(assignmentGenericLookupTypeNarrowing.ts, 6, 7)) |
| 32 | + |
| 33 | + return; |
| 34 | + const x = element.x; |
| 35 | +>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 9, 7)) |
| 36 | +>element.x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 41)) |
| 37 | +>element : Symbol(element, Decl(assignmentGenericLookupTypeNarrowing.ts, 6, 7)) |
| 38 | +>x : Symbol(x, Decl(assignmentGenericLookupTypeNarrowing.ts, 2, 41)) |
| 39 | +} |
| 40 | + |
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