13 lines
785 B
TypeScript
13 lines
785 B
TypeScript
//// [contextualTypingOfLambdaReturnExpression.ts]
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function callb(lam: (l: number) => void);
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function callb(lam: (n: string) => void);
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function callb(a) { }
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callb((a) => a.length); // Ok, we choose the second overload because the first one gave us an error when trying to resolve the lambda return type
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callb((a) => { a.length; }); // Error, we picked the first overload and errored when type checking the lambda body
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//// [contextualTypingOfLambdaReturnExpression.js]
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function callb(a) { }
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callb(function (a) { return a.length; }); // Ok, we choose the second overload because the first one gave us an error when trying to resolve the lambda return type
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callb(function (a) { a.length; }); // Error, we picked the first overload and errored when type checking the lambda body
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