Решение на упр.04 задача 1 от Димитър Колев
Резултати
- 2 точки от тестове
- 0 бонус точки
- 2 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
trait ToJson {
fn to_json(&self) -> String;
}
#[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: Vec<Spec>,
title: Title,
}
#[derive(Debug)]
struct University<T> {
name: String,
students: Vec<Student>,
teachers: Vec<T>,
}
impl Student {
fn new(name: String, age: u8, spec: Spec) -> Student {
Student { name, age, spec }
}
}
impl Teacher {
fn new(name: String, age: u8, specs: Vec<Spec>, title: Title) -> Teacher {
Teacher {
name,
age,
specs,
title,
}
}
}
impl<T> University<T> {
fn new(name: String, students: Vec<Student>, teachers: Vec<T>) -> University<T> {
University {
name,
students,
teachers,
}
}
}
impl<T: ToJson> ToJson for Vec<T> {
fn to_json(&self) -> String {
format!(
"[{}]",
self.iter()
.map(|x| x.to_json())
.collect::<Vec<String>>()
.join(",")
)
}
}
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 Title {
fn to_json(&self) -> String {
match self {
Title::Assistant => "\"Assistant\"".to_string(),
Title::Doctor => "\"Doctor\"".to_string(),
Title::Professor => "\"Professor\"".to_string(),
}
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
format!(
r#"{{"name":"{}","age":{},"spec":{}}}"#,
self.name,
self.age,
self.spec.to_json()
)
}
}
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.to_json()
)
}
}
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 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 pin-project-lite v0.2.16
Compiling slab v0.4.11
Compiling syn v2.0.109
Compiling futures-task v0.3.31
Compiling pin-utils v0.1.0
Compiling memchr v2.7.6
Compiling futures-io v0.3.31
Compiling solution v0.1.0 (/tmp/d20251106-1757769-1wqzc0g/solution)
warning: trait `ToJson` is never used
--> src/lib.rs:1:7
|
1 | trait ToJson {
| ^^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: enum `Spec` is never used
--> src/lib.rs:6:6
|
6 | enum Spec {
| ^^^^
warning: enum `Title` is never used
--> src/lib.rs:15:6
|
15 | enum Title {
| ^^^^^
warning: struct `Student` is never constructed
--> src/lib.rs:22:8
|
22 | struct Student {
| ^^^^^^^
warning: struct `Teacher` is never constructed
--> src/lib.rs:29:8
|
29 | struct Teacher {
| ^^^^^^^
warning: struct `University` is never constructed
--> src/lib.rs:37:8
|
37 | struct University<T> {
| ^^^^^^^^^^
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) -> Student {
| ^^^
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: Vec<Spec>, title: Title) -> Teacher {
| ^^^
warning: associated function `new` is never used
--> src/lib.rs:61:8
|
60 | impl<T> University<T> {
| --------------------- associated function in this implementation
61 | fn new(name: String, students: Vec<Student>, teachers: Vec<T>) -> University<T> {
| ^^^
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:9:5
|
6 | enum Spec {
| ---- variants in this enum
...
9 | KN,
| ^^
10 | I,
| ^
11 | 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:16:5
|
15 | enum Title {
| ----- variants in this enum
16 | Assistant,
| ^^^^^^^^^
17 | 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 8.58s
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