73 lines
2.5 KiB
TypeScript
73 lines
2.5 KiB
TypeScript
//// [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 (d, b) {
|
|
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
|
|
function __() { this.constructor = d; }
|
|
__.prototype = b.prototype;
|
|
d.prototype = new __();
|
|
};
|
|
var a;
|
|
var b;
|
|
var Base = (function () {
|
|
function Base() {
|
|
}
|
|
return Base;
|
|
})();
|
|
var Derived = (function (_super) {
|
|
__extends(Derived, _super);
|
|
function Derived() {
|
|
_super.apply(this, arguments);
|
|
}
|
|
return Derived;
|
|
})(Base);
|
|
var Derived2 = (function (_super) {
|
|
__extends(Derived2, _super);
|
|
function Derived2() {
|
|
_super.apply(this, arguments);
|
|
}
|
|
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
|
|
}
|