Initial commit.

.gitignore

@@ -0,0 +1,3 @@
+/target
+main
+.idea

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "first-rust"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "first-rust"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

src/main.rs

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+struct Greeter {
+    greeting: &'static str,
+}
+
+impl Greeter {
+    fn new(greeting: &'static str) -> Greeter {
+        Greeter { greeting }
+    }
+
+    fn greet(&self) {
+        println!("{}", self.greeting);
+    }
+}
+
+struct LinkedList<T> {
+    head: Link<T>,
+}
+
+enum Link<T> {
+    Empty,
+    More(Box<Node<T>>),
+}
+
+struct Node<T> {
+    data: T,
+    next: Link<T>,
+}
+
+impl<T> LinkedList<T> {
+    fn new() -> Self {
+        LinkedList { head: Link::Empty }
+    }
+
+    fn push(&mut self, data: T) {
+        self.head = Link::More(Box::new(Node {
+            data,
+            next: std::mem::replace(&mut self.head, Link::Empty),
+        }));
+    }
+
+    fn pop(&mut self) -> Option<T> {
+        match std::mem::replace(&mut self.head, Link::Empty) {
+            Link::Empty => None,
+            Link::More(node) => {
+                self.head = node.next;
+                Some(node.data)
+            }
+        }
+    }
+}
+
+impl<T> Iterator for LinkedList<T> {
+    type Item = T;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.pop()
+    }
+}
+
+fn main() {
+    Greeter::new("Hello, Jesse!").greet();
+
+    let mut my_linked_list = LinkedList::new();
+    my_linked_list.push(Greeter::new("Hello"));
+    my_linked_list.push(Greeter::new("Beautiful"));
+    my_linked_list.push(Greeter::new("World"));
+
+    for greeter in my_linked_list {
+        greeter.greet();
+    }
+}