1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
//// [bestCommonTypeOfConditionalExpressions.ts]
// conditional expressions return the best common type of the branches plus contextual type (using the first candidate if multiple BCTs exist)
// no errors expected here
var a: { x: number; y?: number };
var b: { x: number; z?: number };
class Base { foo: string; }
class Derived extends Base { bar: string; }
class Derived2 extends Base { baz: string; }
var base: Base;
var derived: Derived;
var derived2: Derived2;
var r = true ? 1 : 2;
var r3 = true ? 1 : {};
var r4 = true ? a : b; // typeof a
var r5 = true ? b : a; // typeof b
var r6 = true ? (x: number) => { } : (x: Object) => { }; // returns number => void
var r7: (x: Object) => void = true ? (x: number) => { } : (x: Object) => { };
var r8 = true ? (x: Object) => { } : (x: number) => { }; // returns Object => void
var r10: Base = true ? derived : derived2; // no error since we use the contextual type in BCT
var r11 = true ? base : derived2;
function foo5<T, U>(t: T, u: U): Object {
return true ? t : u; // BCT is Object
}
//// [bestCommonTypeOfConditionalExpressions.js]
// conditional expressions return the best common type of the branches plus contextual type (using the first candidate if multiple BCTs exist)
// no errors expected here
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var a;
var b;
var Base = /** @class */ (function () {
function Base() {
}
return Base;
}());
var Derived = /** @class */ (function (_super) {
__extends(Derived, _super);
function Derived() {
return _super !== null && _super.apply(this, arguments) || this;
}
return Derived;
}(Base));
var Derived2 = /** @class */ (function (_super) {
__extends(Derived2, _super);
function Derived2() {
return _super !== null && _super.apply(this, arguments) || this;
}
return Derived2;
}(Base));
var base;
var derived;
var derived2;
var r = true ? 1 : 2;
var r3 = true ? 1 : {};
var r4 = true ? a : b; // typeof a
var r5 = true ? b : a; // typeof b
var r6 = true ? function (x) { } : function (x) { }; // returns number => void
var r7 = true ? function (x) { } : function (x) { };
var r8 = true ? function (x) { } : function (x) { }; // returns Object => void
var r10 = true ? derived : derived2; // no error since we use the contextual type in BCT
var r11 = true ? base : derived2;
function foo5(t, u) {
return true ? t : u; // BCT is Object
}
|
