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=== tests/cases/compiler/restParamUsingMappedTypeOverUnionConstraint.ts ===
// repro 29919#issuecomment-470948453
type HomomorphicMappedType<T> = { [P in keyof T]: T[P] extends string ? boolean : null }
>HomomorphicMappedType : HomomorphicMappedType<T>
declare function test<T extends [number] | [string]>(
>test : <T extends [number] | [string]>(args: T, fn: (...args: HomomorphicMappedType<T>) => void) => void
args: T,
>args : T
fn: (...args: HomomorphicMappedType<T>) => void
>fn : (...args: HomomorphicMappedType<T>) => void
>args : HomomorphicMappedType<T>
): void
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