Решение на упр.04 задача 1 от Ивайло Иванов
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,
}
#[derive(Debug)]
struct Teacher {
name: String,
age: u8,
specs_teaching: Vec<Spec>,
title: Title,
}
#[derive(Debug)]
struct University<T: ToJson> {
name: String,
students: Vec<Student>,
teachers: Vec<T>,
}
trait ToJson {
fn to_json(&self) -> String;
}
impl Student {
fn new(name: String, age: u8, spec: Spec) -> Self {
Student { name, age, spec }
}
}
impl Teacher {
fn new(name: String, age: u8, specs_teaching: Vec<Spec>, title: Title) -> Self {
Teacher { name, age, specs_teaching, title }
}
}
impl<T: ToJson> University<T> {
fn new(name: String, students: Vec<Student>, teachers: Vec<T>) -> Self {
University { name, students, teachers }
}
}
impl<T> ToJson for Vec<T> where T: ToJson {
fn to_json(&self) -> String {
let mut iter = self.iter();
let first = iter.next();
let mut result = match first {
Some(first) => first.to_json(),
None => String::new(),
};
for e in iter {
result.push_str(", ");
result.push_str(&e.to_json());
}
result
}
}
impl ToJson for Spec {
fn to_json(&self) -> String {
match self {
Spec::SI => "\"SI\"".to_string(),
Spec::IS => "\"IS\"".to_string(),
Spec::KN => "\"KN\"".to_string(),
Spec::I => "\"I\"".to_string(),
Spec::M => "\"M\"".to_string(),
}
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
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_teaching.to_json(),
self.title
)
}
}
impl<T: ToJson> ToJson for University<T> {
fn to_json(&self) -> String {
format!(
r#"{{
"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 unicode-ident v1.0.22
Compiling quote v1.0.41
Compiling futures-sink v0.3.31
Compiling futures-core v0.3.31
Compiling futures-channel v0.3.31
Compiling futures-io v0.3.31
Compiling pin-project-lite v0.2.16
Compiling syn v2.0.109
Compiling pin-utils v0.1.0
Compiling slab v0.4.11
Compiling futures-task v0.3.31
Compiling memchr v2.7.6
Compiling solution v0.1.0 (/tmp/d20251106-1757769-13cnpu5/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: struct `Teacher` is never constructed
--> src/lib.rs:25:8
|
25 | struct Teacher {
| ^^^^^^^
warning: struct `University` is never constructed
--> src/lib.rs:33:8
|
33 | struct University<T: ToJson> {
| ^^^^^^^^^^
warning: trait `ToJson` is never used
--> src/lib.rs:39:7
|
39 | trait ToJson {
| ^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:44:8
|
43 | impl Student {
| ------------ associated function in this implementation
44 | fn new(name: String, age: u8, spec: Spec) -> Self {
| ^^^
warning: associated function `new` is never used
--> src/lib.rs:50:8
|
49 | impl Teacher {
| ------------ associated function in this implementation
50 | fn new(name: String, age: u8, specs_teaching: Vec<Spec>, title: Title) -> Self {
| ^^^
warning: associated function `new` is never used
--> src/lib.rs:56:8
|
55 | impl<T: ToJson> University<T> {
| ----------------------------- associated function in this implementation
56 | fn new(name: String, students: Vec<Student>, teachers: Vec<T>) -> Self {
| ^^^
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 8.03s
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