36 lines
No EOL
2.1 KiB
TypeScript
36 lines
No EOL
2.1 KiB
TypeScript
// These tests ensure that in cases where it may *appear* that a value has a type,
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// they actually are properly being contextually typed. The way we test this is
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// that we invoke contextually typed arguments with type arguments.
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// Since 'any' cannot be invoked with type arguments, we should get errors
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// back if contextual typing is not taking effect.
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type FuncType = (x: <T>(p: T) => T) => typeof x;
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function fun<T>(f: FuncType, x: T): T;
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function fun<T>(f: FuncType, g: FuncType, x: T): T;
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function fun<T>(...rest: any[]): T {
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return undefined;
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}
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var a = fun(x => { x<number>(undefined); return x; }, 10);
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var b = fun((x => { x<number>(undefined); return x; }), 10);
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var c = fun(((x => { x<number>(undefined); return x; })), 10);
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var d = fun((((x => { x<number>(undefined); return x; }))), 10);
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var e = fun(x => { x<number>(undefined); return x; }, x => { x<number>(undefined); return x; }, 10);
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var f = fun((x => { x<number>(undefined); return x; }),(x => { x<number>(undefined); return x; }), 10);
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var g = fun(((x => { x<number>(undefined); return x; })),((x => { x<number>(undefined); return x; })), 10);
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var h = fun((((x => { x<number>(undefined); return x; }))),((x => { x<number>(undefined); return x; })), 10);
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// Ternaries in parens
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var i = fun((Math.random() < 0.5 ? x => { x<number>(undefined); return x; } : x => undefined), 10);
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var j = fun((Math.random() < 0.5 ? (x => { x<number>(undefined); return x; }) : (x => undefined)), 10);
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var k = fun((Math.random() < 0.5 ? (x => { x<number>(undefined); return x; }) : (x => undefined)), x => { x<number>(undefined); return x; }, 10);
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var l = fun(((Math.random() < 0.5 ? ((x => { x<number>(undefined); return x; })) : ((x => undefined)))),((x => { x<number>(undefined); return x; })), 10);
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var lambda1: FuncType = x => { x<number>(undefined); return x; };
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var lambda2: FuncType = (x => { x<number>(undefined); return x; });
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type ObjType = { x: (p: number) => string; y: (p: string) => number };
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var obj1: ObjType = { x: x => (x, undefined), y: y => (y, undefined) };
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var obj2: ObjType = ({ x: x => (x, undefined), y: y => (y, undefined) }); |