From 464d4add74b745346f0ccdf4d1bed29a6e59e32d Mon Sep 17 00:00:00 2001
From: sunface <cto@188.com>
Date: Tue, 12 Apr 2022 10:50:21 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E5=AD=97=E7=AC=A6=E4=B8=B2?=
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/basic/compound-type/string-slice.md | 47 ++++++++++++++++++++++++-
 内容变更记录.md                   |  4 +++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/src/basic/compound-type/string-slice.md b/src/basic/compound-type/string-slice.md
index cbab31be..f84cd10c 100644
--- a/src/basic/compound-type/string-slice.md
+++ b/src/basic/compound-type/string-slice.md
@@ -449,7 +449,7 @@ fn main() {
 代码运行结果：
 
 ```console
-string_remove 占 18 个字
+string_remove 占 18 个字节
 string_remove = "试remove方法"
 ```
 
@@ -579,6 +579,51 @@ fn main() {
 hello rust!
 ```
 
+## 字符串转义
+
+我们可以通过转义的方式 `\` 输出 ASCII 和 Unicode 字符。
+
+```rust
+fn main() {
+    // 通过 \ + 字符的十六进制表示，转义输出一个字符
+    let byte_escape = "I'm writing \x52\x75\x73\x74!";
+    println!("What are you doing\x3F (\\x3F means ?) {}", byte_escape);
+
+    // \u 可以输出一个 unicode 字符
+    let unicode_codepoint = "\u{211D}";
+    let character_name = "\"DOUBLE-STRUCK CAPITAL R\"";
+
+    println!(
+        "Unicode character {} (U+211D) is called {}",
+        unicode_codepoint, character_name
+    );
+
+    // 换行了也会保持之前的字符串格式
+    let long_string = "String literals
+                        can span multiple lines.
+                        The linebreak and indentation here ->\
+                        <- can be escaped too!";
+    println!("{}", long_string);
+}
+```
+
+当然，在某些情况下，可能你会希望保持字符串的原样，不要转义:
+```rust
+fn main() {
+    println!("{}", "hello \\x52\\x75\\x73\\x74");
+    let raw_str = r"Escapes don't work here: \x3F \u{211D}";
+    println!("{}", raw_str);
+
+    // 如果字符串包含双引号，可以在开头和结尾加 #
+    let quotes = r#"And then I said: "There is no escape!""#;
+    println!("{}", quotes);
+
+    // 如果还是有歧义，可以继续增加，没有限制
+    let longer_delimiter = r###"A string with "# in it. And even "##!"###;
+    println!("{}", longer_delimiter);
+}
+```
+
 ## 操作 UTF-8 字符串
 
 前文提到了几种使用 UTF-8 字符串的方式，下面来一一说明。
diff --git a/内容变更记录.md b/内容变更记录.md
index 70c90dea..d02646eb 100644
--- a/内容变更记录.md
+++ b/内容变更记录.md
@@ -1,6 +1,10 @@
 # ChangeLog
 记录一些值得注意的变更。
 
+## 2022-04-12
+
+- [优化字符串章节，增加字符串转义](https://course.rs/basic/compound-type/string-slice.html#字符串转义)
+
 ## 2022-04-11
 
 - 增加 [OnceCell](https://course.rs/advance/global-variable.html#标准库中的-oncecell), 感谢 [Rustln](https://github.com/rustln) 提交的 PR