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dmitry-a-morozov/du.ts

Created February 25, 2016 00:54
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du.ts
class C1 { item: string }
class C2 { item: string[] }
class C3 { item: string }
type C1_C2_C3 = C1 | C2 | C3;
function Foo(x: C1_C2_C3): string {
if (x instanceof C1) return x.item;
else if (x instanceof C2) return x.item[0];
else if (x instanceof C3) return x.item;
}
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