Data commit

Task/Extend-your-language/Rust/extend-your-language.rust

@@ -0,0 +1,31 @@
+#![allow(unused_variables)]
+macro_rules! if2 {
+    ($cond1: expr, $cond2: expr
+        => $both:expr
+        => $first: expr
+        => $second:expr
+        => $none:expr)
+    => {
+        match ($cond1, $cond2) {
+            (true, true) => $both,
+            (true, _   ) => $first,
+            (_   , true) => $second,
+            _            => $none
+        }
+    }
+}
+
+fn main() {
+    let i = 1;
+    let j = 2;
+    if2!(i > j, i + j >= 3
+        => {
+            // code blocks and statements can go here also
+            let k = i + j;
+            println!("both were true")
+        }
+        => println!("the first was true")
+        => println!("the second was true")
+        => println!("neither were true")
+    )
+}