Решение на упр.04 задача 1 от Деян Делчев
Резултати
- 2 точки от тестове
- 0 бонус точки
- 2 точки общо
- 2 успешни тест(а)
- 0 неуспешни тест(а)
Код
use std::fmt::Debug;
trait ToJson
where
Self: Debug,
{
fn to_json(&self) -> String {
format!("\"{:?}\"", self)
}
}
impl<T: ToJson> ToJson for Vec<T> {
fn to_json(&self) -> String {
format!(
"[{}]",
self.iter()
.map(T::to_json)
.collect::<Vec<String>>()
.join(", ")
)
}
}
#[derive(Debug)]
enum Spec {
SI,
IS,
KN,
I,
M,
}
impl ToJson for Spec {}
#[derive(Debug)]
enum Title {
Assistant,
Doctor,
Professor,
}
impl ToJson for Title {}
#[derive(Debug)]
struct Student {
name: String,
age: i32,
spec: Spec,
}
impl Student {
fn new(name: String, age: i32, spec: Spec) -> Self {
Student {
name: name,
age,
spec,
}
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
format!(
"{{ \"name\": \"{}\", \"age\": {}, \"spec\": {}}}",
self.name,
self.age,
self.spec.to_json()
)
}
}
#[derive(Debug)]
struct Teacher {
name: String,
age: i32,
spec: Vec<Spec>,
title: Title,
}
impl Teacher {
fn new(name: String, age: i32, 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,
self.age,
self.spec.to_json(),
self.title.to_json()
)
}
}
#[derive(Debug)]
struct University<T: ToJson> {
name: String,
students: Vec<Student>,
teachers: Vec<T>,
}
impl<T:ToJson> University<T> {
fn new(name: String, students: Vec<Student>, teachers: Vec<T>) -> Self {
University {
name,
students,
teachers,
}
}
}
impl<T: ToJson> ToJson for University<T> {
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 pin-utils v0.1.0
Compiling pin-project-lite v0.2.16
Compiling futures-io v0.3.31
Compiling syn v2.0.109
Compiling futures-task v0.3.31
Compiling memchr v2.7.6
Compiling slab v0.4.11
Compiling solution v0.1.0 (/tmp/d20251106-1757769-rqbwen/solution)
warning: trait `ToJson` is never used
--> src/lib.rs:3:7
|
3 | trait ToJson
| ^^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: enum `Spec` is never used
--> src/lib.rs:25:6
|
25 | enum Spec {
| ^^^^
warning: enum `Title` is never used
--> src/lib.rs:36:6
|
36 | enum Title {
| ^^^^^
warning: struct `Student` is never constructed
--> src/lib.rs:45:8
|
45 | struct Student {
| ^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:52:8
|
51 | impl Student {
| ------------ associated function in this implementation
52 | fn new(name: String, age: i32, spec: Spec) -> Self {
| ^^^
warning: struct `Teacher` is never constructed
--> src/lib.rs:73:8
|
73 | struct Teacher {
| ^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:81:8
|
80 | impl Teacher {
| ------------ associated function in this implementation
81 | fn new(name: String, age: i32, spec: Vec<Spec>, title: Title) -> Self {
| ^^^
warning: struct `University` is never constructed
--> src/lib.rs:104:8
|
104 | struct University<T: ToJson> {
| ^^^^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:111:8
|
110 | impl<T:ToJson> University<T> {
| ---------------------------- associated function in this implementation
111 | 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:28:5
|
25 | enum Spec {
| ---- variants in this enum
...
28 | KN,
| ^^
29 | I,
| ^
30 | 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:37:5
|
36 | enum Title {
| ----- variants in this enum
37 | Assistant,
| ^^^^^^^^^
38 | 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 8.26s
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