Initial commit

01_declarative/Cargo.toml

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+[package]
+name = "demo"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

01_declarative/src/main.rs

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+// Declarative macros
+
+// macro_rules! custom_vec {
+//     ( $( $x:expr ),* ) => {
+//         {
+//             let mut temp_vec = Vec::new();
+//             $(
+//                 temp_vec.push($x);
+//             )*
+//             temp_vec
+//         }
+//     };
+//     // ( $( $x:expr ),*; mult = $mult:expr ) => {
+//     //     custom_vec![$( $x * $mult ),*]
+//     // };
+// }
+
+fn main() {
+    let mut a = Vec::new();
+    a.push(1);
+    a.push(2);
+    a.push(3);
+
+    // let a = vec![1, 2, 3];
+
+    // let a = custom_vec!(1, 2, 3);
+
+    // let a = custom_vec!(1, 2, 3; mult = 2);
+
+    println!("{a:?}");
+}