feat: Add enums exercises
This commit is contained in:
parent
2191ef7eee
commit
dc15032112
7
exercises/enums/README.md
Normal file
7
exercises/enums/README.md
Normal file
@ -0,0 +1,7 @@
|
||||
### Enums
|
||||
|
||||
Rust allows you to define a type called `enums` which allow you to enumerate possible values. In combination with enums, we have the concept of `pattern matching` in Rust, which makes it easy to run different code for different values of an enumeration. Enums, while available in many languages, Rust's enums are most similar to `algebraic data types` in functional languages, such as F#, OCaml, and Haskell.
|
||||
|
||||
#### Book Sections
|
||||
|
||||
- [Enums](https://doc.rust-lang.org/book/ch06-00-enums.html)
|
42
exercises/enums/enums1.rs
Normal file
42
exercises/enums/enums1.rs
Normal file
@ -0,0 +1,42 @@
|
||||
// enums1.rs
|
||||
// Make me compile! Scroll down for hints!
|
||||
|
||||
#[derive(Debug)]
|
||||
enum Message {
|
||||
// TODO: define a few types of messages as used below
|
||||
}
|
||||
|
||||
fn main() {
|
||||
println!("{:?}", Message::Quit);
|
||||
println!("{:?}", Message::Echo);
|
||||
println!("{:?}", Message::Move);
|
||||
println!("{:?}", Message::ChangeColor);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// Hint: The declaration of the enumeration type has not been defined yet.
|
61
exercises/enums/enums2.rs
Normal file
61
exercises/enums/enums2.rs
Normal file
@ -0,0 +1,61 @@
|
||||
// enums2.rs
|
||||
// Make me compile! Scroll down for hints
|
||||
|
||||
#[derive(Debug)]
|
||||
enum Message {
|
||||
// TODO: define the different variants used below
|
||||
}
|
||||
|
||||
impl Message {
|
||||
fn call(&self) {
|
||||
println!("{:?}", &self);
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let messages = [
|
||||
Message::Move{ x: 10, y: 30 },
|
||||
Message::Echo(String::from("hello world")),
|
||||
Message::ChangeColor(200, 255, 255),
|
||||
Message::Quit
|
||||
];
|
||||
|
||||
for message in &messages {
|
||||
message.call();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// Hint: you can create enumerations that have different variants with different types
|
||||
// such as no data, anonymous structs, a single string, tuples, ...etc
|
63
exercises/enums/enums3.rs
Normal file
63
exercises/enums/enums3.rs
Normal file
@ -0,0 +1,63 @@
|
||||
// enums3.rs
|
||||
// Address all the TODOs to make the tests pass!
|
||||
|
||||
enum Message {
|
||||
// TODO: implement the message variant types based on their usage below
|
||||
}
|
||||
|
||||
struct Point {
|
||||
x: u8,
|
||||
y: u8
|
||||
}
|
||||
|
||||
struct State {
|
||||
color: (u8, u8, u8),
|
||||
position: Point,
|
||||
quit: bool
|
||||
}
|
||||
|
||||
impl State {
|
||||
fn change_color(&mut self, color: (u8, u8, u8)) {
|
||||
self.color = color;
|
||||
}
|
||||
|
||||
fn quit(&mut self) {
|
||||
self.quit = true;
|
||||
}
|
||||
|
||||
fn echo(&self, s: String) {
|
||||
println!("{}", s);
|
||||
}
|
||||
|
||||
fn move_position(&mut self, p: Point) {
|
||||
self.position = p;
|
||||
}
|
||||
|
||||
fn process(&mut self, message: Message) {
|
||||
// TODO: create a match expression to process the different message variants
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn test_match_message_call() {
|
||||
let mut state = State{
|
||||
quit: false,
|
||||
position: Point{ x: 0, y: 0 },
|
||||
color: (0, 0, 0)
|
||||
};
|
||||
state.process(Message::ChangeColor(255, 0, 255));
|
||||
state.process(Message::Echo(String::from("hello world")));
|
||||
state.process(Message::Move{ x: 10, y: 15 });
|
||||
state.process(Message::Quit);
|
||||
|
||||
assert_eq!(state.color, (255, 0, 255));
|
||||
assert_eq!(state.position.x, 10);
|
||||
assert_eq!(state.position.y, 15);
|
||||
assert_eq!(state.quit, true);
|
||||
}
|
||||
|
||||
}
|
14
info.toml
14
info.toml
@ -86,6 +86,20 @@ mode = "test"
|
||||
path = "exercises/structs/structs2.rs"
|
||||
mode = "test"
|
||||
|
||||
# ENUMS
|
||||
|
||||
[[exercises]]
|
||||
path = "exercises/enums/enums1.rs"
|
||||
mode = "compile"
|
||||
|
||||
[[exercises]]
|
||||
path = "exercises/enums/enums2.rs"
|
||||
mode = "compile"
|
||||
|
||||
[[exercises]]
|
||||
path = "exercises/enums/enums3.rs"
|
||||
mode = "test"
|
||||
|
||||
# TESTS
|
||||
|
||||
[[exercises]]
|
||||
|
Reference in New Issue
Block a user