57 lines
1.5 KiB
Plaintext
57 lines
1.5 KiB
Plaintext
=== tests/cases/compiler/subtypeRelationForNever.ts ===
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function fail(message: string) : never { throw new Error(message); }
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>fail : (message: string) => never
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>message : string
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>new Error(message) : Error
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>Error : ErrorConstructor
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>message : string
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function withFew<a, r>(values: a[], haveFew: (values: a[]) => r, haveNone: (reason: string) => r): r {
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>withFew : <a, r>(values: a[], haveFew: (values: a[]) => r, haveNone: (reason: string) => r) => r
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>a : a
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>r : r
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>values : a[]
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>a : a
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>haveFew : (values: a[]) => r
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>values : a[]
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>a : a
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>r : r
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>haveNone : (reason: string) => r
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>reason : string
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>r : r
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>r : r
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return values.length > 0 ? haveFew(values) : haveNone('No values.');
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>values.length > 0 ? haveFew(values) : haveNone('No values.') : r
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>values.length > 0 : boolean
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>values.length : number
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>values : a[]
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>length : number
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>0 : number
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>haveFew(values) : r
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>haveFew : (values: a[]) => r
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>values : a[]
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>haveNone('No values.') : r
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>haveNone : (reason: string) => r
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>'No values.' : string
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}
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function id<a>(value: a) : a { return value; }
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>id : <a>(value: a) => a
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>a : a
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>value : a
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>a : a
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>a : a
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>value : a
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const result = withFew([1, 2, 3], id, fail); // expected result is number[]
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>result : number[]
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>withFew([1, 2, 3], id, fail) : number[]
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>withFew : <a, r>(values: a[], haveFew: (values: a[]) => r, haveNone: (reason: string) => r) => r
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>[1, 2, 3] : number[]
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>1 : number
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>2 : number
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>3 : number
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>id : <a>(value: a) => a
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>fail : (message: string) => never
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