14 lines
408 B
TypeScript
14 lines
408 B
TypeScript
interface I1<T> {
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func<U>(callback: (value: T) => U): I1<T>;
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}
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declare var v1: I1<number>;
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var r1 = v1.func(num => num.toString())
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.func(str => str.length) // error, number doesn't have a length
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.func(num => num.toString())
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var s1 = v1.func(num => num.toString())
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var s2 = s1.func(str => str.length) // should also error
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var s3 = s2.func(num => num.toString())
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