/
intersectionTypeMembers.js
105 lines (93 loc) · 2.19 KB
/
intersectionTypeMembers.js
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//// [intersectionTypeMembers.ts]
// An intersection type has those members that are present in any of its constituent types,
// with types that are intersections of the respective members in the constituent types
interface A { a: string }
interface B { b: string }
interface C { c: string }
var abc: A & B & C;
abc.a = "hello";
abc.b = "hello";
abc.c = "hello";
interface X { x: A }
interface Y { x: B }
interface Z { x: C }
var xyz: X & Y & Z;
xyz.x.a = "hello";
xyz.x.b = "hello";
xyz.x.c = "hello";
type F1 = (x: string) => string;
type F2 = (x: number) => number;
var f: F1 & F2;
var s = f("hello");
var n = f(42);
interface D {
nested: { doublyNested: { d: string; }, different: { e: number } };
}
interface E {
nested: { doublyNested: { f: string; }, other: {g: number } };
}
const de: D & E = {
nested: {
doublyNested: {
d: 'yes',
f: 'no'
},
different: { e: 12 },
other: { g: 101 }
}
}
// Additional test case with >2 doubly nested members so fix for #31441 is tested w/ excess props
interface F {
nested: { doublyNested: { g: string; } }
}
interface G {
nested: { doublyNested: { h: string; } }
}
const defg: D & E & F & G = {
nested: {
doublyNested: {
d: 'yes',
f: 'no',
g: 'ok',
h: 'affirmative'
},
different: { e: 12 },
other: { g: 101 }
}
}
//// [intersectionTypeMembers.js]
// An intersection type has those members that are present in any of its constituent types,
// with types that are intersections of the respective members in the constituent types
var abc;
abc.a = "hello";
abc.b = "hello";
abc.c = "hello";
var xyz;
xyz.x.a = "hello";
xyz.x.b = "hello";
xyz.x.c = "hello";
var f;
var s = f("hello");
var n = f(42);
var de = {
nested: {
doublyNested: {
d: 'yes',
f: 'no'
},
different: { e: 12 },
other: { g: 101 }
}
};
var defg = {
nested: {
doublyNested: {
d: 'yes',
f: 'no',
g: 'ok',
h: 'affirmative'
},
different: { e: 12 },
other: { g: 101 }
}
};