Update variadics.md (#186)

fake-rick · web-flow · commit 3eb378bbecc2 · 2024-01-13T19:33:11.000+08:00
diff --git a/src/macros/variadics.md b/src/macros/variadics.md
@@ -7,12 +7,12 @@
 ```rust,editable
 macro_rules! calculate {
     // 单个 `eval` 的模式
-    (eval $e:expr) => {{
+    (eval $e:expr) => {
         {
             let val: usize = $e; // Force types to be integers
             println!("{} = {}", stringify!{$e}, val);
         }
-    }};
+    };
 
     // 递归地拆解多重的 `eval`
     (eval $e:expr, $(eval $es:expr),+) => {{

Original file line number	Diff line number	Diff line change
`@@ -7,12 +7,12 @@`
`7`	`7`	```rust,editable
`8`	`8`	`macro_rules! calculate {`
`9`	`9`	// 单个 `eval` 的模式
`10`		`- (eval $e:expr) => {{`
	`10`	`+ (eval $e:expr) => {`
`11`	`11`	`{`
`12`	`12`	`let val: usize = $e; // Force types to be integers`
`13`	`13`	`println!("{} = {}", stringify!{$e}, val);`
`14`	`14`	`}`
`15`		`- }};`
	`15`	`+ };`
`16`	`16`
`17`	`17`	// 递归地拆解多重的 `eval`
`18`	`18`	`(eval $e:expr, $(eval $es:expr),+) => {{`