Решение на упр.04 задача 1 от Ясин Йосифов
Резултати
- 2 точки от тестове
- 0 бонус точки
- 2 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
#[derive(Debug)]
enum Spec {
SI,
IS,
KN,
I,
M,
}
#[derive(Debug)]
enum Title {
Assistant,
Doctor,
Professor,
}
#[derive(Debug)]
struct Student {
name: String,
age: u32,
spec: Spec,
}
impl Student {
fn new(name: String, age: u32, spec: Spec) -> Self {
Student { name, age, spec }
}
}
#[derive(Debug)]
struct Teacher {
name: String,
age: u32,
specs: Vec::<Spec>,
title: Title,
}
impl Teacher {
fn new(name: String, age: u32, specs: Vec::<Spec>, title: Title) -> Self {
Teacher { name, age, specs, title }
}
}
#[derive(Debug)]
struct University<T, J> {
name: String,
students: Vec::<T>,
teachers: Vec::<J>,
}
impl<T: ToJson, J: ToJson> University<T, J> {
fn new(name: String, students: Vec::<T>, teachers: Vec::<J>) -> Self {
University { name, students, teachers }
}
}
trait ToJson {
fn to_json(&self) -> String;
}
impl<T: ToJson> ToJson for Vec<T> {
fn to_json(&self) -> String {
let mut json = String::new();
let mut iter = self.iter();
json.push_str("[ ");
if let Some(item) = iter.next() {
json.push_str(&item.to_json()[..])
}
for item in iter {
json.push_str(", ");
json.push_str(&item.to_json()[..]);
}
json.push_str(" ]");
json
}
}
impl ToJson for Spec {
fn to_json(&self) -> String {
format!("\"{:?}\"", self)
}
}
impl ToJson for Title {
fn to_json(&self) -> String {
format!("\"{:?}\"", self)
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
format!("{{ \"name\": \"{}\", \"age\": {}, \"spec\": {}}}", self.name, self.age, self.spec.to_json())
}
}
impl ToJson for Teacher {
fn to_json(&self) -> String {
format!("{{ \"name\": \"{}\", \"age\": {}, \"spec\": {}, \"title\": {}}}",
self.name, self.age, self.specs.to_json(), self.title.to_json())
}
}
impl<T: ToJson, J: ToJson> ToJson for University<T, J> {
fn to_json(&self) -> String {
format!("{{ \"name\": \"{}\", \"students\": {}, \"teachers\": {}}}",
self.name, self.students.to_json(), self.teachers.to_json())
}
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling quote v1.0.41
Compiling unicode-ident v1.0.22
Compiling futures-sink v0.3.31
Compiling futures-core v0.3.31
Compiling futures-channel v0.3.31
Compiling slab v0.4.11
Compiling syn v2.0.109
Compiling futures-task v0.3.31
Compiling memchr v2.7.6
Compiling pin-utils v0.1.0
Compiling pin-project-lite v0.2.16
Compiling futures-io v0.3.31
Compiling solution v0.1.0 (/tmp/d20251106-1757769-1o1frwb/solution)
warning: enum `Spec` is never used
--> src/lib.rs:2:6
|
2 | enum Spec {
| ^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: enum `Title` is never used
--> src/lib.rs:11:6
|
11 | enum Title {
| ^^^^^
warning: struct `Student` is never constructed
--> src/lib.rs:18:8
|
18 | struct Student {
| ^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:25:8
|
24 | impl Student {
| ------------ associated function in this implementation
25 | fn new(name: String, age: u32, spec: Spec) -> Self {
| ^^^
warning: struct `Teacher` is never constructed
--> src/lib.rs:31:8
|
31 | struct Teacher {
| ^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:39:8
|
38 | impl Teacher {
| ------------ associated function in this implementation
39 | fn new(name: String, age: u32, specs: Vec::<Spec>, title: Title) -> Self {
| ^^^
warning: struct `University` is never constructed
--> src/lib.rs:45:8
|
45 | struct University<T, J> {
| ^^^^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:52:8
|
51 | impl<T: ToJson, J: ToJson> University<T, J> {
| ------------------------------------------- associated function in this implementation
52 | fn new(name: String, students: Vec::<T>, teachers: Vec::<J>) -> Self {
| ^^^
warning: trait `ToJson` is never used
--> src/lib.rs:57:7
|
57 | trait ToJson {
| ^^^^^^
warning: `solution` (lib) generated 9 warnings
Compiling futures-macro v0.3.31
Compiling futures-util v0.3.31
Compiling futures-executor v0.3.31
Compiling futures v0.3.31
warning: variants `KN`, `I`, and `M` are never constructed
--> tests/../src/lib.rs:5:5
|
2 | enum Spec {
| ---- variants in this enum
...
5 | KN,
| ^^
6 | I,
| ^
7 | M,
| ^
|
= note: `Spec` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
= note: `#[warn(dead_code)]` on by default
warning: variants `Assistant` and `Doctor` are never constructed
--> tests/../src/lib.rs:12:5
|
11 | enum Title {
| ----- variants in this enum
12 | Assistant,
| ^^^^^^^^^
13 | Doctor,
| ^^^^^^
|
= note: `Title` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
warning: `solution` (test "solution_test") generated 2 warnings
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.13s
Running tests/solution_test.rs (target/debug/deps/solution_test-8c2c5f784503f204)
running 2 tests
test solution_test::test_basic2 ... ok
test solution_test::test_basic ... ok
test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s