From 67cdcc2e12118becb823e20a40cc2687f2b8425a Mon Sep 17 00:00:00 2001 From: Adam Carpenter <53hornet@gmail.com> Date: Wed, 27 Mar 2019 15:32:37 -0400 Subject: Started Rust in Action MEAP. --- rust-book/enums/src/main1.rs | 48 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100755 rust-book/enums/src/main1.rs (limited to 'rust-book/enums/src/main1.rs') 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) -> Option { + + 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); +} -- cgit v1.2.3