#[rustfmt::skip]

macro_rules! my_macro {
    () => {
        println!("Check out my macro!");
    }; // 添加分号分隔第一个分支
    ($val:expr) => {
        println!("Look at this other macro: {}", $val);
    }
}

fn main() {
    my_macro!();
    my_macro!(7777);
}

Author: unix-dot

exercises/macros/macros4.rs

@@ -1,15 +1,8 @@
-// macros4.rs
-//
-// Execute `rustlings hint macros4` or use the `hint` watch subcommand for a
-// hint.
-
-// I AM NOT DONE
-
 #[rustfmt::skip]
 macro_rules! my_macro {
     () => {
         println!("Check out my macro!");
-    }
+    }; // 添加分号分隔第一个分支
     ($val:expr) => {
         println!("Look at this other macro: {}", $val);
     }