Blocking A function blocks when it waits for something to happen before returning. A function may block for many reasons: network I/O, disk I/O, mutexes, etc. In fact, every function blocks, at least a changes to the underlying files are always visible, use the application settings compiled_template_cache=False or debug=True. Template syntax A Tornado template is just HTML (or any other text-based format) of which are terminated with {% end %}. We also support template inheritance using the extends and block statements, which are described in detail in the documentation for the tornado.template. Expressions

Blocking A function blocks when it waits for something to happen before returning. A function may block for many reasons: network I/O, disk I/O, mutexes, etc. In fact, every function blocks, at least a changes to the underlying files are always visible, use the application settings compiled_template_cache=False or debug=True. Template syntax A Tornado template is just HTML (or any other text-based format) of which are terminated with {% end %}. We also support template inheritance using the extends and block statements, which are described in detail in the documentation for the tornado.template. Expressions

run 函数返回。这正是 trpl::run 函数的全部意义：它允许你 选择 在何处阻塞一部分异步代码，也就是在何 处进行同步和异步代码的转换。这正是在大部分运行时中 run 实际上被命名为 block_on 的原因。 请注意这个示例中的两个地方：首先，消息立刻就会到达！其次，虽然我们使用了 future，但 是这里还没有并发。示例中的所有事情都是顺序发生的，就像没涉及到 future 时一样。 String::from("from"), ... | 19 | | } 20 | | }; | |_________- the expected `async` block 21 | 22 | let rx_fut = async { | ______________________- 23 | | while let found `async` block ... 43 | let futures = vec![tx1_fut, rx_fut, tx_fut]; | ^^^^^^ expected `async` block, found a different `async` block | 393/562Rust