Решение на упр.08 задача 1 от Божидар Виденов
Към профила на Божидар Виденов
Резултати
- 4 точки от тестове
- 0 бонус точки
- 4 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::rc::Rc;
struct List<T> {
head: Link<T>,
}
type Link<T> = Option<Rc<Node<T>>>;
struct Node<T> {
elem: T,
next: Link<T>,
}
impl<T> List<T> {
fn new() -> Self {
List { head: None }
}
fn head(&self) -> Option<&T> {
match &self.head {
None => None,
Some(link) => Some(&link.elem),
}
}
fn tail(&self) -> List<T> {
match &self.head {
Some(head) => List {
head: head.next.clone(),
},
None => List { head: None },
}
}
fn prepend(&self, value: T) -> List<T> {
let new_head: Link<T> = Some(Rc::new(Node {
elem: value,
next: self.head.clone(),
}));
List { head: new_head }
}
fn iter(&self) -> Iter<'_, T> {
Iter {
curr_el: &self.head,
}
}
}
struct Iter<'a, T> {
curr_el: &'a Link<T>,
}
impl<'a, T> Iterator for Iter<'a, T> {
type Item = &'a T;
fn next(&mut self) -> Option<Self::Item> {
match self.curr_el {
None => None,
Some(node) => {
self.curr_el = &node.next;
Some(&node.elem)
}
}
}
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling quote v1.0.42
Compiling unicode-ident v1.0.22
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling futures-channel v0.3.31
Compiling futures-task v0.3.31
Compiling syn v2.0.111
Compiling pin-utils v0.1.0
Compiling memchr v2.7.6
Compiling pin-project-lite v0.2.16
Compiling slab v0.4.11
Compiling futures-io v0.3.31
Compiling solution v0.1.0 (/tmp/d20251211-1757769-goo77b/solution)
warning: struct `List` is never constructed
--> src/lib.rs:3:8
|
3 | struct List<T> {
| ^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: type alias `Link` is never used
--> src/lib.rs:7:6
|
7 | type Link<T> = Option<Rc<Node<T>>>;
| ^^^^
warning: struct `Node` is never constructed
--> src/lib.rs:9:8
|
9 | struct Node<T> {
| ^^^^
warning: associated items `new`, `head`, `tail`, `prepend`, and `iter` are never used
--> src/lib.rs:15:8
|
14 | impl<T> List<T> {
| --------------- associated items in this implementation
15 | fn new() -> Self {
| ^^^
...
19 | fn head(&self) -> Option<&T> {
| ^^^^
...
26 | fn tail(&self) -> List<T> {
| ^^^^
...
35 | fn prepend(&self, value: T) -> List<T> {
| ^^^^^^^
...
44 | fn iter(&self) -> Iter<'_, T> {
| ^^^^
warning: struct `Iter` is never constructed
--> src/lib.rs:51:8
|
51 | struct Iter<'a, T> {
| ^^^^
warning: `solution` (lib) generated 5 warnings
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.36s
Running tests/solution_test.rs (target/debug/deps/solution_test-ee0783488e12dce9)
running 2 tests
test solution_test::test_list ... ok
test solution_test::test_iterator ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s