小编clo*_*oud的帖子

@xxx("xxx")
class A{
    msg:string
    constructor(msg:string) {
        this.msg = msg
    }
    print() {
        console.log(this.msg)
    }
}

function xxx(arg:string) {
    function f(target) {
        function ff(msg: string) {
            return new target(arg + ":" + msg)
        }
        return ff
    }
    return f
}

let a = new A("hellow")
a.print()

编译时,报告:

decorator.ts(1,1):错误TS1238:当作为表达式调用时,无法解析类装饰器的签名.类型'(msg:string)=> any'不能分配给'void'类型.

但是生成的js执行得很好.我不知道为什么报错.