Решение на упр.04 задача 1 от Илиян Свечев
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: u8,
spec: Spec,
}
impl Student {
fn new(name: String, age: u8, spec: Spec) -> Student {
Student{name, age, spec}
}
}
#[derive(Debug)]
struct Teacher {
name: String,
age: u8,
specs: Vec<Spec>,
title: Title,
}
impl Teacher {
fn new(name: String, age: u8, specs: Vec<Spec>, title: Title) -> Teacher {
Teacher{name, age, specs, title}
}
}
#[derive(Debug)]
struct University<T, U> {
name: String,
students: Vec<T>,
teachers: Vec<U>,
}
impl<T, U> University<T, U> {
fn new(name: String, students: Vec<T>, teachers: Vec<U>) -> University<T, U> {
University { name, students, teachers }
}
}
trait ToJson {
fn to_json(&self) -> String;
}
impl ToJson for Spec {
fn to_json(&self) -> String {
match &&self {
Self::I => {
format!("\"I\"")
}
Self::IS => {
format!("\"IS\"")
}
Self::KN => {
format!("\"KN\"")
}
Self::M => {
format!("\"M\"")
}
Self::SI => {
format!("\"SI\"")
}
}
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
//format!("{{\"name\": \"{}\", \"age\": {}, \"spec\": \"{:?}\"\\}}", self.name, self.age, self.spec)
format!(r#"{{"name": "{}", "age": {}, "spec": "{:?}"}}"#, self.name, self.age, self.spec)
}
}
impl ToJson for Teacher {
fn to_json(&self) -> String {
format!(r#"{{"name": "{}", "age": {}, "spec": {}, "title": "{:?}"}}"#, self.name, self.age, self.specs.to_json(), self.title)
}
}
impl<T: ToJson> ToJson for Vec<T> {
fn to_json(&self) -> String {
let mut res = "[".to_string();
for person in self {
res.push_str(person.to_json().as_str());
res.push_str(",\n");
}
res.pop(); // remove ,\n after the last person
res.pop();
res.push_str("]");
res
}
}
impl<T: ToJson, U: ToJson> ToJson for University<T, U> {
fn to_json(&self) -> String {
format!(
r#"{{
"name": "{}",
"students": {},
"teachers": {}
}}"#,
self.name, self.students.to_json(), self.teachers.to_json()
)
}
}
fn main() {
let s1 = Student::new("Ivan".to_string(), 20, Spec::SI);
let s2 = Student::new("Peter".to_string(), 25, Spec::SI);
let t1 = Teacher::new(
"Dr. Petrov".to_string(),
45,
vec![Spec::SI, Spec::IS],
Title::Professor,
);
let uni = University::new("SU".to_string(), vec![s1, s2], vec![t1]);
println!("{}", uni.to_json());
}
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
Compiling unicode-ident v1.0.22
Compiling quote v1.0.41
Compiling futures-core v0.3.31
Compiling futures-sink v0.3.31
Compiling futures-channel v0.3.31
Compiling slab v0.4.11
Compiling syn v2.0.109
Compiling memchr v2.7.6
Compiling futures-io v0.3.31
Compiling futures-task v0.3.31
Compiling pin-project-lite v0.2.16
Compiling pin-utils v0.1.0
Compiling solution v0.1.0 (/tmp/d20251106-1757769-1b6xevp/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: u8, spec: Spec) -> Student {
| ^^^
warning: struct `Teacher` is never constructed
--> src/lib.rs:32:8
|
32 | struct Teacher {
| ^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:40:8
|
39 | impl Teacher {
| ------------ associated function in this implementation
40 | fn new(name: String, age: u8, specs: Vec<Spec>, title: Title) -> Teacher {
| ^^^
warning: struct `University` is never constructed
--> src/lib.rs:46:8
|
46 | struct University<T, U> {
| ^^^^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:53:8
|
52 | impl<T, U> University<T, U> {
| --------------------------- associated function in this implementation
53 | fn new(name: String, students: Vec<T>, teachers: Vec<U>) -> University<T, U> {
| ^^^
warning: trait `ToJson` is never used
--> src/lib.rs:58:7
|
58 | trait ToJson {
| ^^^^^^
warning: function `main` is never used
--> src/lib.rs:124:4
|
124 | fn main() {
| ^^^^
warning: `solution` (lib) generated 10 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: function `main` is never used
--> tests/../src/lib.rs:124:4
|
124 | fn main() {
| ^^^^
warning: `solution` (test "solution_test") generated 3 warnings
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.41s
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