59 lines
1.4 KiB
TypeScript
59 lines
1.4 KiB
TypeScript
// @strict: true
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declare const sym1: unique symbol;
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declare const sym2: unique symbol;
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type T1 = string & 'a'; // 'a'
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type T2 = 'a' & string & 'b'; // never
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type T3 = number & 10; // 10
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type T4 = 10 & number & 20; // never
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type T5 = symbol & typeof sym1; // typeof sym1
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type T6 = typeof sym1 & symbol & typeof sym2; // never
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type T7 = string & 'a' & number & 10 & symbol & typeof sym1; // never
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type T10 = string & ('a' | 'b'); // 'a' | 'b'
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type T11 = (string | number) & ('a' | 10); // 'a' | 10
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type N1 = 'a' & 'b';
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type N2 = { a: string } & null;
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type N3 = { a: string } & undefined;
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type N4 = string & number;
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type N5 = number & object;
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type N6 = symbol & string;
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type N7 = void & string;
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type X = { x: string };
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type X1 = X | 'a' & 'b';
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type X2 = X | { a: string } & null;
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type X3 = X | { a: string } & undefined;
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type X4 = X | string & number;
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type X5 = X | number & object;
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type X6 = X | symbol & string;
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type X7 = X | void & string;
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// Repro from #31663
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const x1 = { a: 'foo', b: 42 };
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const x2 = { a: 'foo', b: true };
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declare let k: 'a' | 'b';
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x1[k] = 'bar' as any; // Error
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x2[k] = 'bar' as any; // Error
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const enum Tag1 {}
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const enum Tag2 {}
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declare let s1: string & Tag1;
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declare let s2: string & Tag2;
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declare let t1: string & Tag1 | undefined;
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declare let t2: string & Tag2 | undefined;
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s1 = s2;
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s2 = s1;
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t1 = t2;
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t2 = t1;
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