Created
July 1, 2020 13:35
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/*-------------------------------------------------------------------------------------------------------------- | |
* Copyright (c) Microsoft Corporation. All rights reserved. | |
* Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information. | |
*-------------------------------------------------------------------------------------------------------------*/ | |
struct StA { | |
a: i64, | |
b: i64, | |
} | |
enum WebEvent { | |
// An `enum` may either be `unit-like`, | |
PageLoad, | |
PageUnload, | |
// like tuple structs, | |
KeyPress(char), | |
Paste(String), | |
// or c-like structures. | |
Click { x: i64, y: i64 }, | |
Touch { x: i64, y: i64, z: i64 }, | |
T(StA), | |
} | |
// A function which takes a `WebEvent` enum as an argument and | |
// returns nothing. | |
fn inspect(event: WebEvent) { | |
match event { | |
WebEvent::PageLoad => println!("page loaded"), | |
WebEvent::PageUnload => println!("page unloaded"), | |
// Destructure `c` from inside the `enum`. | |
WebEvent::KeyPress(c) => println!("pressed '{}'.", c), | |
WebEvent::Paste(s) => println!("pasted \"{}\".", s), | |
// Destructure `Click` into `x` and `y`. | |
WebEvent::Click { x, y } => { | |
println!("clicked at x={}, y={}.", x, y); | |
} | |
WebEvent::Touch { x, y, z } => { | |
println!("clicked at x={}, y={}, z={}", x, y, z); | |
} | |
WebEvent::T(st) => { | |
println!("StA, a={}, b={}", st.a, st.b); | |
} | |
} | |
} | |
fn main() { | |
let pressed = WebEvent::KeyPress('x'); | |
// `to_owned()` creates an owned `String` from a string slice. | |
let pasted = WebEvent::Paste("my text".to_owned()); | |
let click = WebEvent::Click { x: 20, y: 80 }; | |
let touch = WebEvent::Touch { | |
x: 20, | |
y: 80, | |
z: 100, | |
}; | |
let load = WebEvent::PageLoad; | |
let unload = WebEvent::PageUnload; | |
let st = WebEvent::T(StA { a: 10, b: 10 }); | |
inspect(pressed); | |
inspect(pasted); | |
inspect(click); | |
inspect(load); | |
inspect(unload); | |
inspect(touch); | |
inspect(st); | |
} |
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