我想做这样的事情:
class Base {
static foo(): <???>; // <= What goes here?
}
class Subclass extends Base {}
Subclass.foo() // <= I want this to have a return type of Subclass, not Base
答案 0 :(得分:5)
TypeScript在过去一年中一直在积极添加功能,包括对I am doing this data structure program and it showing a error : expected expression ')' token at line 33. i don't have any idea how to get over this.的支持。 using class types in generics在2.3或更高版本中编译:
with_items: ec2.instances
答案 1 :(得分:3)
遗憾的是,您需要明确地注释或以编译器可以推断它的方式编写:
class Base {
static foo() {
return new Base();
}
}
class Subclass extends Base {
static foo() {
return new Subclass();
}
}
Subclass.foo()
在任何一种情况下,Subclass
都需要某种形式的重复定义。