18 lines
510 B
JavaScript
18 lines
510 B
JavaScript
declare function foo(x: mixed): boolean %checks(x !== null);
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declare function my_filter<T, P: $Pred<1>>(v: Array<T>, cb: P): Array<$Refine<T,P,1>>;
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declare function f2(x: mixed): string %checks(Array.isArray(x));
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function foo(x: mixed): %checks { return typeof x === "string"; }
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function is_string(x): boolean %checks {
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return typeof x === "string";
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}
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var f = (x: mixed): %checks => typeof x === "string";
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const foo2 = (x: mixed): boolean %checks => typeof x === "string";
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(x): %checks => x !== null;
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