From 7e8ee5ed9cad6484e9f13f81731b102ced58402e Mon Sep 17 00:00:00 2001
From: Adam Carpenter <gitlab@53hor.net>
Date: Tue, 9 Jul 2019 15:14:04 -0400
Subject: Init.
---
rust-book/enums/src/main.rs | 12 +++++++++++
rust-book/enums/src/main1.rs | 48 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 60 insertions(+)
create mode 100755 rust-book/enums/src/main.rs
create mode 100755 rust-book/enums/src/main1.rs
(limited to 'rust-book/enums/src')
diff --git a/rust-book/enums/src/main.rs b/rust-book/enums/src/main.rs
new file mode 100755
index 0000000..b8c61de
--- /dev/null
+++ b/rust-book/enums/src/main.rs
@@ -0,0 +1,12 @@
+fn main() {
+ let some_u8_value = Some(3u8);
+// match some_u8_value {
+// Some(3) => println!("three"),
+// _ => (),
+// }
+
+ if let Some(3) = some_u8_value {
+ println!("three");
+ }
+
+}
diff --git a/rust-book/enums/src/main1.rs b/rust-book/enums/src/main1.rs
new file mode 100755
index 0000000..9670693
--- /dev/null
+++ b/rust-book/enums/src/main1.rs
@@ -0,0 +1,48 @@
+#[derive(Debug)]
+enum UsState {
+ NY,
+ VA,
+ NC,
+}
+
+enum Coin {
+ Penny,
+ Nickel,
+ Dime,
+ Quarter(UsState),
+}
+
+impl Coin {
+
+ fn value_in_cents(self) -> u32 {
+
+ match self {
+ Coin::Penny => {
+ println!("lucky penny");
+ 1
+ },
+ Coin::Nickel => 5,
+ Coin::Dime => 10,
+ Coin::Quarter(state) => {
+ println!("State quarter from {:?}", state);
+ 25
+ },
+
+ }
+
+ }
+}
+
+fn plus_one(x: Option<i32>) -> Option<i32> {
+
+ match x {
+ None => None,
+ Some(i) => Some(i + 1),
+ }
+}
+
+fn main() {
+ let five = Some(5);
+ let six = plus_one(five);
+ let none = plus_one(None);
+}
--
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