classes

rust/classes/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rust-oop"
+version = "0.1.0"

rust/classes/Cargo.toml

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+[package]
+name = "rust-oop"
+version = "0.1.0"
+authors = ["Timo Hocker <t-hocker@web.de>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

rust/classes/README.md

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+# Classes in Rust
+
+Rust doesn't have classes like Java or other typical c style languages. Instead
+there are Structs and Traits.
+
+Structs are responsible for storing data and nothing else. Traits define
+functions that can be used.
+
+## Relevant Files
+
+- [car.rs](./src/car.rs)

rust/classes/src/car.rs

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+/*
+ * Define the trait Information that will contain the function print_info()
+ */
+pub trait Information {
+  // define the function, &self is an argument that will be autofilled
+  // when running the function and it will reference the current object
+  fn print_info(&self);
+}
+
+/*
+ * Define the struct Car, which will hold all the necessary information 
+ */
+pub struct Car {
+  pub manufacturer: String,
+  pub model: String
+}
+
+/*
+ * Implementing the trait Information for the struct Car
+ */
+impl Information for Car {
+  fn print_info(&self) {
+    println!("Car Information:");
+    println!("- manufacturer: {}", self.manufacturer);
+    println!("- model: {}", self.model);
+  }
+}

rust/classes/src/main.rs

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+mod car;
+use car::Information;
+
+fn main() {
+  // create a new car and store it in the variable 'a'
+  // rust also doesn't use the 'new' keyword
+  // all attributes have to be defined upon creation of the object
+  let a = car::Car {
+    // set some data for that car
+    manufacturer: "Benz".to_string(),
+    model: "Velo".to_string()
+  };
+
+  // do the same for a second car
+  let b = car::Car {
+    manufacturer: "Ford".to_string(),
+    model: "Model T".to_string()
+  };
+
+  // use a function of the car class to print out the information
+  a.print_info();
+  b.print_info();
+}