67 lines
1.4 KiB
TypeScript
67 lines
1.4 KiB
TypeScript
// An intersection type has those members that are present in any of its constituent types,
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// with types that are intersections of the respective members in the constituent types
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interface A { a: string }
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interface B { b: string }
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interface C { c: string }
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var abc: A & B & C;
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abc.a = "hello";
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abc.b = "hello";
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abc.c = "hello";
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interface X { x: A }
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interface Y { x: B }
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interface Z { x: C }
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var xyz: X & Y & Z;
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xyz.x.a = "hello";
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xyz.x.b = "hello";
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xyz.x.c = "hello";
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type F1 = (x: string) => string;
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type F2 = (x: number) => number;
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var f: F1 & F2;
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var s = f("hello");
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var n = f(42);
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interface D {
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nested: { doublyNested: { d: string; }, different: { e: number } };
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}
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interface E {
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nested: { doublyNested: { f: string; }, other: {g: number } };
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}
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const de: D & E = {
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nested: {
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doublyNested: {
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d: 'yes',
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f: 'no'
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},
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different: { e: 12 },
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other: { g: 101 }
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}
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}
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// Additional test case with >2 doubly nested members so fix for #31441 is tested w/ excess props
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interface F {
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nested: { doublyNested: { g: string; } }
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}
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interface G {
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nested: { doublyNested: { h: string; } }
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}
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const defg: D & E & F & G = {
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nested: {
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doublyNested: {
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d: 'yes',
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f: 'no',
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g: 'ok',
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h: 'affirmative'
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},
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different: { e: 12 },
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other: { g: 101 }
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}
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}
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