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
4 lines
134 B
TypeScript
4 lines
134 B
TypeScript
declare function f<T>(predicate: (x: {}) => x is T): T;
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// 'res' should be of type 'number'.
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const res = f((n): n is number => true);
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