19 lines
598 B
TypeScript
19 lines
598 B
TypeScript
// Simple mapped type and inferrence
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type Mapped<T> = { [K in keyof T]: { name: T[K] } };
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type InferFromMapped<T> = T extends Mapped<infer R> ? R : never;
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// Object literal type and associated mapped type
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// Note that in the real code we don't have a direct reference to LiteralType
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type LiteralType = {
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first: "first";
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second: "second";
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}
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type MappedLiteralType = {
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first: { name: "first" },
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second: { name: "second" },
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};
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type Inferred = InferFromMapped<MappedLiteralType>;
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// UNEXPECTED resolves to false
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type Test1 = Inferred extends Record<any, string> ? true : false; |