尝试导入“reqwest::async”错误，指出“async”是保留关键字

Question

我想使用 reqwest crate 发出异步 HTTP 请求。我有以下代码：

// see https://docs.rs/reqwest/*/reqwest/async/index.html
use reqwest::async::Client;

当我尝试编译代码时出现以下错误：

error: expected identifier, found reserved keyword `async`
 --> src/main.rs:1:14
  |
1 | use reqwest::async::Client;
  |              ^^^^^ expected identifier, found reserved keyword

如何从 async 模块导入？

Answer 1

因为 reqwest::async 是在 async 之前创建的，是一个保留关键字（我相信这发生在 Rust 2018 中）之前这个 Just Worked™。

既然 async 是保留关键字，您需要使用 raw identifier 语法：

use request::r#async::Client;

尝试导入“reqwest::async”错误，指出“async”是保留关键字

Attempting to import `reqwest::async` errors stating that `async` is a reserved keyword

syntax

rust

reqwest

rust-2018