打字稿重载函数

Question

我试图listen在Server对象上调用重载函数。似乎正在发生的事情是编译器将错误的方法与调用匹配，即使存在匹配的定义。我不知道如何去调试这个。

Server 对象具有以下定义

class Server extends events.EventEmitter {
        constructor(connectionListener?: (socket: Socket) => void);
        constructor(options?: { allowHalfOpen?: boolean, pauseOnConnect?: boolean }, connectionListener?: (socket: Socket) => void);

        listen(port?: number, hostname?: string, backlog?: number, listeningListener?: () => void): this;
        listen(port?: number, hostname?: string, listeningListener?: () => void): this;
        listen(port?: number, backlog?: number, listeningListener?: () => void): this;
        listen(port?: number, listeningListener?: () => void): this;
        listen(path: string, backlog?: number, listeningListener?: () => void): this;
        listen(path: string, listeningListener?: () => void): this;
        listen(options: ListenOptions, listeningListener?: () => void): this;
        listen(handle: any, backlog?: number, listeningListener?: () => void): this;
        listen(handle: any, listeningListener?: () => void): this;

...

以下编译并运行良好：

server.listen(8080)

以下内容根本无法编译：

server.listen(8080, '0.0.0.0')

智能感知报告

No overload matches this call.
  The last overload gave the following error.
    Argument of type '"0.0.0.0"' is not assignable to parameter of type '() => void'.ts(2769)
net.d.ts(193, 9): The last overload is declared here.

编译器同样抱怨：

node_modules/ts-node/src/index.ts:261
    return new TSError(diagnosticText, diagnosticCodes)
           ^
TSError: ? Unable to compile TypeScript:
lib/app.ts(333,35): error TS2345: Argument of type '"0.0.0.0"' is not assignable to parameter of type '() => void'.

    at createTSError (node_modules/ts-node/src/index.ts:261:12)
    at getOutput (node_modules/ts-node/src/index.ts:367:40)
    at Object.compile (node_modules/ts-node/src/index.ts:558:11)
    at Module.m._compile (node_modules/ts-node/src/index.ts:439:43)
    at Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Object.require.extensions.(anonymous function) [as .ts] (node_modules/ts-node/src/index.ts:442:12)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)

提前致谢！

Answer 1

我今天遇到了同样的问题。不确定发生这种情况的真正原因，但我已经通过通过方法传递参数来修复它call。

server.listen.call(server, 4000, '0.0.0.0', () => {
  console.log(server.address()) // output is { address: '0.0.0.0', family: 'IPv4', port: 4000 }
});