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// @noImplicitAny: true
// @strictNullChecks: true
// Repro from #41759
type DiscriminatorTrue = {
disc: true;
cb: (x: string) => void;
}
type DiscriminatorFalse = {
disc?: false;
cb: (x: number) => void;
}
type Props = DiscriminatorTrue | DiscriminatorFalse;
declare function f(options: DiscriminatorTrue | DiscriminatorFalse): any;
// simple inference
f({
disc: true,
cb: s => parseInt(s)
});
// simple inference
f({
disc: false,
cb: n => n.toFixed()
});
// simple inference when strict-null-checks are enabled
f({
disc: undefined,
cb: n => n.toFixed()
});
// requires checking type information since discriminator is missing from object
f({
cb: n => n.toFixed()
});
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