Решение на упр.04 задача 1 от Димитър Николов
Към профила на Димитър Николов
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: usize,
spec: Spec,
}
#[derive(Debug)]
struct Teacher {
name: String,
age: usize,
spec: Vec<Spec>,
title: Title,
}
#[derive(Debug)]
enum AcademicPerson {
Student(Student),
Teacher(Teacher),
}
#[derive(Debug)]
struct University {
name: String,
students: Vec<Student>,
teachers: Vec<AcademicPerson>,
}
trait ToJson {
fn to_json(&self) -> String;
}
impl ToJson for String {
fn to_json(&self) -> String {
format!("\"{}\"", self)
}
}
impl Spec {
fn as_string(&self) -> String {
match self {
Spec::SI => String::from("SI"),
Spec::IS => String::from("IS"),
Spec::KN => String::from("KN"),
Spec::I => String::from("I"),
Spec::M => String::from("M"),
}
}
}
impl ToJson for Spec {
fn to_json(&self) -> String {
self.as_string().to_json()
}
}
impl Title {
fn as_string(&self) -> String {
match self {
Title::Assistant => String::from("Assistant"),
Title::Doctor => String::from("Doctor"),
Title::Professor => String::from("Professor"),
}
}
}
impl ToJson for Title {
fn to_json(&self) -> String {
self.as_string().to_json()
}
}
impl Student {
pub fn new(name: String, age: usize, spec: Spec) -> Self {
Student { name, age, spec }
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
format!(
"{{\"name\": {}, \"age\": {}, \"spec\": {}}}",
self.name.to_json(),
self.age,
self.spec.to_json()
)
}
}
impl Teacher {
pub fn new(name: String, age: usize, spec: Vec<Spec>, title: Title) -> Self {
Teacher {
name,
age,
spec,
title,
}
}
}
impl ToJson for Teacher {
fn to_json(&self) -> String {
format!(
"{{\"name\": {}, \"age\": {}, \"spec\": {}, \"title\": {}}}",
self.name.to_json(),
self.age,
self.spec.to_json(),
self.title.to_json()
)
}
}
impl ToJson for AcademicPerson {
fn to_json(&self) -> String {
match self {
AcademicPerson::Student(student) => student.to_json(),
AcademicPerson::Teacher(teacher) => teacher.to_json(),
}
}
}
impl From<Student> for AcademicPerson {
fn from(student: Student) -> Self {
Self::Student(student)
}
}
impl From<Teacher> for AcademicPerson {
fn from(teacher: Teacher) -> Self {
Self::Teacher(teacher)
}
}
impl University {
pub fn new<T: Into<AcademicPerson>>(
name: String,
students: Vec<Student>,
teachers: Vec<T>,
) -> Self {
University {
name,
students,
teachers: teachers.into_iter().map(|x| x.into()).collect(),
}
}
}
impl ToJson for University {
fn to_json(&self) -> String {
format!(
"{{\"name\": {}, \"students\": {}, \"teachers\": {}}}",
self.name.to_json(),
self.students.to_json(),
self.teachers.to_json()
)
}
}
impl<T: ToJson> ToJson for Vec<T> {
fn to_json(&self) -> String {
let mut result = String::from("[");
let inner_str = self
.iter()
.map(|x| x.to_json())
.collect::<Vec<String>>()
.join(", ");
result.push_str(&inner_str);
result.push(']');
result
}
}
fn main() {
let student = Student::new("Dimitar".to_string(), 20, Spec::KN);
let teacher = Teacher::new(
"Anonymous".to_string(),
27,
vec![Spec::KN],
Title::Assistant,
);
let university = University::new("SU".to_string(), vec![student], vec![teacher]);
println!("{}", university.to_json());
// {
// "name": "SU",
// "students": [
// {"name": "Dimitar", "age": 20, "spec": "KN"}
// ],
// "teachers": [
// {"name": "Anonymous", "age": 27, "spec": ["KN"], "title": "Assistant"}
// ]
// }
}
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 pin-utils v0.1.0
Compiling pin-project-lite v0.2.16
Compiling futures-io v0.3.31
Compiling memchr v2.7.6
Compiling futures-task v0.3.31
Compiling solution v0.1.0 (/tmp/d20251106-1757769-1ck61cy/solution)
warning: variants `SI`, `IS`, `KN`, `I`, and `M` are never constructed
--> src/lib.rs:3:5
|
2 | enum Spec {
| ---- variants in this enum
3 | SI,
| ^^
4 | IS,
| ^^
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`, `Doctor`, and `Professor` are never constructed
--> src/lib.rs:12:5
|
11 | enum Title {
| ----- variants in this enum
12 | Assistant,
| ^^^^^^^^^
13 | Doctor,
| ^^^^^^
14 | Professor,
| ^^^^^^^^^
|
= note: `Title` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
warning: fields `name`, `age`, and `spec` are never read
--> src/lib.rs:19:5
|
18 | struct Student {
| ------- fields in this struct
19 | name: String,
| ^^^^
20 | age: usize,
| ^^^
21 | spec: Spec,
| ^^^^
|
= note: `Student` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
warning: fields `name`, `age`, `spec`, and `title` are never read
--> src/lib.rs:26:5
|
25 | struct Teacher {
| ------- fields in this struct
26 | name: String,
| ^^^^
27 | age: usize,
| ^^^
28 | spec: Vec<Spec>,
| ^^^^
29 | title: Title,
| ^^^^^
|
= note: `Teacher` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
warning: field `0` is never read
--> src/lib.rs:34:13
|
34 | Student(Student),
| ------- ^^^^^^^
| |
| field in this variant
|
= note: `AcademicPerson` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
|
34 | Student(()),
| ~~
warning: field `0` is never read
--> src/lib.rs:35:13
|
35 | Teacher(Teacher),
| ------- ^^^^^^^
| |
| field in this variant
|
= note: `AcademicPerson` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
|
35 | Teacher(()),
| ~~
warning: struct `University` is never constructed
--> src/lib.rs:39:8
|
39 | struct University {
| ^^^^^^^^^^
warning: trait `ToJson` is never used
--> src/lib.rs:45:7
|
45 | trait ToJson {
| ^^^^^^
warning: method `as_string` is never used
--> src/lib.rs:56:8
|
55 | impl Spec {
| --------- method in this implementation
56 | fn as_string(&self) -> String {
| ^^^^^^^^^
warning: method `as_string` is never used
--> src/lib.rs:74:8
|
73 | impl Title {
| ---------- method in this implementation
74 | fn as_string(&self) -> String {
| ^^^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:90:12
|
89 | impl Student {
| ------------ associated function in this implementation
90 | pub fn new(name: String, age: usize, spec: Spec) -> Self {
| ^^^
warning: associated function `new` is never used
--> src/lib.rs:107:12
|
106 | impl Teacher {
| ------------ associated function in this implementation
107 | pub fn new(name: String, age: usize, spec: Vec<Spec>, title: Title) -> Self {
| ^^^
warning: associated function `new` is never used
--> src/lib.rs:151:12
|
150 | impl University {
| --------------- associated function in this implementation
151 | pub fn new<T: Into<AcademicPerson>>(
| ^^^
warning: function `main` is never used
--> src/lib.rs:189:4
|
189 | fn main() {
| ^^^^
warning: `solution` (lib) generated 14 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:189:4
|
189 | fn main() {
| ^^^^
warning: `solution` (test "solution_test") generated 3 warnings
Finished `test` profile [unoptimized + debuginfo] target(s) in 10.41s
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