72 lines
2.2 KiB
TypeScript
72 lines
2.2 KiB
TypeScript
// @strict: true
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// @declaration: true
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type T00 = [string?];
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type T01 = [string, string?];
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type T02 = [string?, string]; // Error
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type T03 = [...string[]];
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type T04 = [...[...string[]]];
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type T05 = [...[...[...string[]]]];
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type T06 = [string, ...string[]];
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type T07 = [...string[], string]; // Error
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type T08 = [...string]; // Error
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type T09 = [...string?]; // Error
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type T10 = [string, ...[...string[]]];
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type T11 = [string, ...[...[...string[]]]];
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type T15 = [boolean, number, ...string[]];
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type L15 = T15["length"]; // number
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declare function assign<T, S extends T>(): void;
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assign<number[], [...number[]]>();
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assign<number[], [number, ...number[]]>();
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assign<[...number[]], number[]>();
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assign<[number, ...number[]], number[]>(); // Error
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assign<[number, ...number[]], []>(); // Error
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assign<[number, ...number[]], [number]>();
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assign<[number, ...number[]], [number, number]>();
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assign<[number, ...number[]], [number, number, ...number[]]>();
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assign<[number], [...number[]]>(); // Error
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assign<[number], [number, ...number[]]>(); // Error
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assign<[number, ...number[]], [number, ...string[]]>(); // Error
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assign<[number, ...number[]], [string, ...number[]]>(); // Error
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assign<[number, ...number[]], [number, number, string]>(); // Error
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assign<[number, ...number[]], [number, number, number, string]>(); // Error
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type T20 = [number, string, ...boolean[]];
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type T21 = T20[0];
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type T22 = T20[0 | 1];
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type T23 = T20[0 | 1 | 2];
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type T24 = T20[0 | 1 | 2 | 3];
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type T25 = T20[1 | 2 | 3];
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type T26 = T20[2 | 3];
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type T27 = T20[3];
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type T28 = T20[number];
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declare const t: T20;
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declare const x: number;
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let e0 = t[0]; // number
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let e1 = t[1]; // string
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let e2 = t[2]; // boolean
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let e3 = t[3]; // boolean
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let ex = t[x]; // number | string | boolean
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declare function f0<T, U>(x: [T, ...U[]]): [T, U];
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f0([]); // Error
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f0([1]);
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f0([1, 2, 3]);
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f0([1, "hello", true]);
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declare function f1(a: [(x: number) => number, ...((x: string) => number)[]]): void;
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declare function f2(...a: [(x: number) => number, ...((x: string) => number)[]]): void;
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f1([x => x * 2, x => x.length, x => x.charCodeAt(0)]);
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f2(x => x * 2, x => x.length, x => x.charCodeAt(0));
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