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我写了一些代码,在操场上创建交集类型以允许使用new
创建类型,或者调用构造函数。这在操场上正常工作:类型...不是构造函数类型
module Test {
export interface IType<TType> {
new (...args: any[]): TType;
}
export interface ICallableType<TInstance, TType extends IType<TInstance>> {
(): TInstance;
new(): TInstance;
}
class $MyObject extends Object { // ('Object' is here just as an example)
static abc = 1;
x = 1;
y = 2;
}
function registerClass<TInstance, TType extends IType<TInstance>>(_type: TType)
: ICallableType<TInstance, TType> & TType
{
return null;
}
export var MyObject = registerClass<$MyObject, typeof $MyObject>($MyObject);
var o = MyObject();
o.x = 1;
export class $TestA extends MyObject {
a = 3;
}
var TestA = registerClass<$TestA, typeof $TestA>($TestA);
var a = TestA();
export class $TestB extends TestA {
b = 4;
}
var TestB = registerClass<$TestB, typeof $TestB>($TestB);
var b = TestB();
}
(see here)
使用VS 2017最新更新,这并不在所有的工作。 $TestA extends MyObject
因Type ICallableType<TInstance, TType> & TType is not a constructor function
而失败。任何想法为什么?看来操场有一些旧版本,所以这是一个突破性的改变或什么?
VS 2017中的TypeScript版本是什么? – Paleo
你为什么从Object中派生类? –
VS 2017有v2.1.5(预览有2.2) –