matching

17-matching/Cargo.toml

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+[package]
+name = "matching"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

17-matching/src/main.rs

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+#[derive(Debug)]
+enum  Fruits
+    {
+        Apple,
+        Banana,
+        Strawberry
+    }
+enum Cake
+    {
+        Chocolate,
+        Caramel,
+        Fruit(Fruits),
+        Tahini,
+        Butter,
+        Vanilin,
+    }
+fn main() 
+    {
+        println!("Hello, world!");
+        let cake1 = Cake::Chocolate;
+        let cake2 = Cake::Caramel;
+        let cake3 = Cake::Fruit(Fruits::Apple);
+        let cake4 = Cake::Fruit(Fruits::Banana);
+        let cake5 = Cake::Fruit(Fruits::Strawberry);
+        let cake6 = Cake::Tahini;
+        let cake7 = Cake::Butter;
+        let cake8 = Cake::Vanilin;
+        
+        let cakes = [cake1,cake2,cake3,cake4,cake5,cake6,cake7,cake8];
+        for i in  cakes
+            {
+                // our dear match always warn us to cover all posibilities
+                // they are like switch case but better I think
+                // they can be useful with enums
+                match i 
+                    {
+                        Cake::Chocolate => println!("Chocolate"),
+                        Cake::Caramel => println!("Caramel"),
+                        Cake::Fruit(name) => println!("Fruit {:#?}", name),
+                        Cake::Tahini => println!("Tahini"),
+                        // this one is wildcard
+                        // but when we don't want to use variable
+                        // we can use it to cover all posibilities
+                        // that's why it's the last one
+                        _ => println!("Others!"),
+                    }
+            }
+
+    }