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Code Issues Releases Activity

Clarify completion condition for elevator exercise (#1574)

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Addresses the first part of #1565.
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Dustin J. Mitchell 2023-12-11 14:12:40 -05:00 committed by GitHub
parent f04e277744
commit e765159be1
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2 changed files with 15 additions and 4 deletions
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15
src/user-defined-types/exercise.md
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@ -8,7 +8,17 @@ We will create a data structure to represent an event in an elevator control
system. It is up to you to define the types and functions to construct various system. It is up to you to define the types and functions to construct various
events. Use `#[derive(Debug)]` to allow the types to be formatted with `{:?}`. events. Use `#[derive(Debug)]` to allow the types to be formatted with `{:?}`.
```rust,compile_fail This exercise only requires creating and populating data structures so that
`main` runs without errors. The next part of the course will cover getting data
out of these structures.
```rust,should_panic
{{#include exercise.rs:event}}
// TODO: add required variants
}
{{#include exercise.rs:direction}}
{{#include exercise.rs:car_arrived}} {{#include exercise.rs:car_arrived}}
todo!() todo!()
} }
@ -31,6 +41,3 @@ events. Use `#[derive(Debug)]` to allow the types to be formatted with `{:?}`.
{{#include exercise.rs:main}} {{#include exercise.rs:main}}
``` ```
This exercise only requires creating data structures. The next part of the
course will cover getting data out of these structures.

4
src/user-defined-types/exercise.rs
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@ -15,9 +15,11 @@
#![allow(dead_code)] #![allow(dead_code)]
// ANCHOR: solution // ANCHOR: solution
// ANCHOR: event
#[derive(Debug)] #[derive(Debug)]
/// An event in the elevator system that the controller must react to. /// An event in the elevator system that the controller must react to.
enum Event { enum Event {
// ANCHOR_END: event
/// A button was pressed. /// A button was pressed.
ButtonPressed(Button), ButtonPressed(Button),
@ -34,12 +36,14 @@ enum Event {
/// A floor is represented as an integer. /// A floor is represented as an integer.
type Floor = i32; type Floor = i32;
// ANCHOR: direction
/// A direction of travel. /// A direction of travel.
#[derive(Debug)] #[derive(Debug)]
enum Direction { enum Direction {
Up, Up,
Down, Down,
} }
// ANCHOR_END: direction
/// A user-accessible button. /// A user-accessible button.
#[derive(Debug)] #[derive(Debug)]