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
3 lines
123 B
TypeScript
3 lines
123 B
TypeScript
[true, true, false, null]
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.filter((thing): thing is boolean => thing !== null)
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.map(thing => thing.toString());
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