8153397e91
* Lazily compute signature type predicates * Use an instance of IdentifierTypePredicate to represent an unresolved type predicate * Simplify `getMaybeTypePredicate` * Invert representation of `resolvedTypePredicate` * Remove `__unresolvedTypePredicate` type and remember to use `noTypePredicate` instead of `undefined` when in all `createSignature` calls * Fix style of getTypePredicateOfSignature * Use in createGetSymbolWalker * Fix bugs for unions of type predicates * Code review * Make noTypePredicate purely an implementation detail of getTypePredictateOfSignature * Add test * Add test for #19642 * Add test with reversed order
15 lines
179 B
TypeScript
15 lines
179 B
TypeScript
interface A {
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pred(x: {}): x is boolean;
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}
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interface B {
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pred(x: {}): x is string;
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}
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type Or = A | B;
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function f(o: Or, x: {}) {
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if (o.pred(x)) {
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x;
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}
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}
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