语言服务器协议中跟踪设置的含义是什么？

Question

我想弄清楚语言服务器协议中trace设置的作用。所以根据规范：

  

初始跟踪设置。如果省略了跟踪被禁用（＆＃39;关闭＆＃39;）。

但这并不能说明我的意思。它嵌入在InitializeParams interface：

中

interface InitializeParams {
    /**
     * The process Id of the parent process that started
     * the server. Is null if the process has not been started by another process.
     * If the parent process is not alive then the server should exit (see exit notification) its process.
     */
    processId: number | null;

    /**
     * The rootPath of the workspace. Is null
     * if no folder is open.
     *
     * @deprecated in favour of rootUri.
     */
    rootPath?: string | null;

    /**
     * The rootUri of the workspace. Is null if no
     * folder is open. If both `rootPath` and `rootUri` are set
     * `rootUri` wins.
     */
    rootUri: DocumentUri | null;

    /**
     * User provided initialization options.
     */
    initializationOptions?: any;

    /**
     * The capabilities provided by the client (editor or tool)
     */
    capabilities: ClientCapabilities;

    /**
     * The initial trace setting. If omitted trace is disabled ('off').
     */
    trace?: 'off' | 'messages' | 'verbose';

    /**
     * The workspace folders configured in the client when the server starts.
     * This property is only available if the client supports workspace folders.
     * It can be `null` if the client supports workspace folders but none are
     * configured.
     *
     * Since 3.6.0
     */
    workspaceFolders?: WorkspaceFolder[] | null;
}

我在本地尝试使用测试语言服务器，但无论我投入什么价值（off，messages，verbose），都没有真正改变。

它实际上做了什么？

Answer 1

我一直在尝试使用Microsoft的示例（https://github.com/Microsoft/vscode-extension-samples）。在他们的lsp-sample中，您可以通过设置ui更改trace的值： 结果是它打印出原始的JSON-RPC消息： 我还没有详细介绍，但是我假设在客户端设置'trace：verbose'会设置InitializeParams中的值以传递给服务器，因此它可以添加自己的跟踪行。 这不是一个确定的答案，但希望您可以看到应该在哪里显示跟踪输出。