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17 lines
315 B
TypeScript
17 lines
315 B
TypeScript
// @strict: true
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interface X {
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a?: { aProp: string };
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b?: { bProp: string };
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}
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type AorB = { a: object; b: undefined } | { a: undefined; b: object };
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declare const q: X & AorB;
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if (q.a !== undefined) {
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q.a.aProp;
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} else {
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// q.b is previously incorrectly inferred as potentially undefined
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q.b.bProp;
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}
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