Initial data commit

Task/Object-serialization/Rust/object-serialization-4.rust

@@ -0,0 +1,86 @@
+use std::fmt::{self, Debug, Display};
+
+use bincode::{deserialize, serialize};
+use serde::{Deserialize, Serialize};
+
+#[typetag::serde(tag = "animal")]
+trait Animal: Display + Debug {
+    fn name(&self) -> Option<&str>;
+    fn feet(&self) -> u32;
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+struct Dog {
+    name: String,
+    color: String,
+}
+
+impl Display for Dog {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{} is a dog with {} fur", self.name, self.color)
+    }
+}
+
+#[typetag::serde]
+impl Animal for Dog {
+    fn name(&self) -> Option<&str> {
+        Some(&self.name)
+    }
+
+    fn feet(&self) -> u32 {
+        4
+    }
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+struct Bird {
+    name: String,
+    wingspan: u32,
+}
+
+impl Display for Bird {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{} is a bird with a wingspan of {}",
+            self.name, self.wingspan
+        )
+    }
+}
+
+#[typetag::serde]
+impl Animal for Bird {
+    fn name(&self) -> Option<&str> {
+        Some(&self.name)
+    }
+
+    fn feet(&self) -> u32 {
+        2
+    }
+}
+
+fn main() -> bincode::Result<()> {
+    let animals: Vec<Box<dyn Animal>> = vec![
+        Box::new(Dog {
+            name: "Rover".into(),
+            color: "brown".into(),
+        }),
+        Box::new(Bird {
+            name: "Tweety".into(),
+            wingspan: 3,
+        }),
+    ];
+
+    for animal in &animals {
+        println!("{}", animal);
+    }
+
+    let serialized = serialize(&animals)?;
+    println!("Serialized into {} bytes", serialized.len());
+
+    let deserialized: Vec<Box<dyn Animal>> = deserialize(&serialized)?;
+
+    println!("{:#?}", deserialized);
+
+    Ok(())
+}