From c5be42b9e8ad40fb42869120510163ea0e2ba944 Mon Sep 17 00:00:00 2001
From: sunface <cto@188.com>
Date: Thu, 13 Jan 2022 17:03:16 +0800
Subject: [PATCH] =?UTF-8?q?update=E5=85=A8=E6=A8=A1=E5=BC=8F=E5=88=97?=
 =?UTF-8?q?=E8=A1=A8?=
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---
 .../concurrency-with-threads/send-sync.md     |  2 +-
 .../basic/match-pattern/all-patterns.md       | 25 +++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/book/contents/advance/concurrency-with-threads/send-sync.md b/book/contents/advance/concurrency-with-threads/send-sync.md
index a225d169..d83ae4cf 100644
--- a/book/contents/advance/concurrency-with-threads/send-sync.md
+++ b/book/contents/advance/concurrency-with-threads/send-sync.md
@@ -91,7 +91,7 @@ fn main() {
     t.join().unwrap();
 }
 ```
-报错跟之前无二： `*mut u8 cannot be sent between threads safely`, 但是有一个问题，我们无法为其直接实现`Send`特征，好在可以用[`newtype`类型](../custom-type.md#newtype):`struct MyBox(*mut u8);`。
+报错跟之前无二： `*mut u8 cannot be sent between threads safely`, 但是有一个问题，我们无法为其直接实现`Send`特征，好在可以用[`newtype`类型](../custom-type.md#newtype) :`struct MyBox(*mut u8);`。
 
 还记得之前的规则吗：复合类型中有一个成员没实现`Send`，该复合类型就不是`Send`，因此我们需要手动为它实现:
 ```rust
diff --git a/book/contents/basic/match-pattern/all-patterns.md b/book/contents/basic/match-pattern/all-patterns.md
index c9f6a2df..e7d2a3a0 100644
--- a/book/contents/basic/match-pattern/all-patterns.md
+++ b/book/contents/basic/match-pattern/all-patterns.md
@@ -561,6 +561,31 @@ match msg {
 
 当你既想要限定分支范围，又想要使用分支的变量时，就可以用`@`来绑定到一个新的变量上，实现想要的功能。
 
+#### @前绑定后解构(Rust1.56新增)
+使用`@`还可以在绑定新变量的同时，对目标进行解构：
+```rust
+#[derive(Debug)]
+struct Point {
+    x: i32,
+    y: i32,
+}
+
+fn main() {
+    // 绑定新变量`p`，同时对`Point`进行解构
+    let p @ Point {x: px, y: py } = Point {x: 10, y: 23};
+    println!("x: {}, y: {}", px, py);
+    println!("{:?}", p);
+
+    
+    let point = Point {x: 10, y: 5};
+    if let p @ Point {x: 10, y} = point {
+        println!("x is 10 and y is {} in {:?}", y, p);
+    } else {
+        println!("x was not 10 :(");
+    }
+}
+```
+
 #### @新特性(Rust1.53新增)
 考虑下面一段代码:
 ```rust