Решение на упр.04 задача 1 от Йосиф Хамед
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;
}
impl<T> ToJson for Vec<T>
where
T: ToJson,
{
fn to_json(&self) -> String {
let mut iter = self.iter();
let mut result = match iter.next() {
Some(first) => first.to_json(),
None => String::new(),
};
for e in iter {
result.push_str(", ");
result.push_str(&e.to_json());
}
format!("[{}]", result)
}
}
pub enum Spec {
SI,
IS,
KN,
I,
M,
}
impl ToJson for Spec {
fn to_json(&self) -> String {
match self {
Spec::SI => "\"SI\"",
Spec::IS => "\"IS\"",
Spec::KN => "\"KN\"",
Spec::I => "\"I\"",
Spec::M => "\"M\"",
}
.to_string()
}
}
pub enum Title {
Professor,
Assistant,
Doctor,
}
impl ToJson for Title {
fn to_json(&self) -> String {
match self {
Title::Professor => "\"Professor\"",
Title::Assistant => "\"Assistant\"",
Title::Doctor => "\"Doctor\"",
}
.to_string()
}
}
pub struct Student {
name: String,
age: i32,
s: Spec,
}
impl Student {
fn new(name: String, age: i32, s: Spec) -> Self {
Self { name, age, s }
}
}
impl ToJson for Student {
fn to_json(&self) -> String {
format!(
r#"{{
"name": "{}",
"age": {},
"spec": {}
}}"#,
self.name,
self.age,
self.s.to_json()
)
}
}
pub struct Teacher {
name: String,
age: i32,
s: Vec<Spec>,
t: Title,
}
impl Teacher {
fn new(name: String, age: i32, s: Vec<Spec>, t: Title) -> Self {
Self { name, age, s, t }
}
}
impl ToJson for Teacher {
fn to_json(&self) -> String {
format!(
r#"{{
"name": "{}",
"age": {},
"spec": {},
"title": {}
}}"#,
self.name,
self.age,
self.s.to_json(),
self.t.to_json()
)
}
}
impl ToJson for Box<dyn ToJson> {
fn to_json(&self) -> String {
(**self).to_json()
}
}
struct University<T: ToJson> {
name: String,
s: Vec<Student>,
t: Vec<T>,
}
impl<T: ToJson> University<T> {
fn new(name: String, s: Vec<Student>, t: Vec<T>) -> Self {
Self { name, s, t }
}
}
impl<T: ToJson> ToJson for University<T> {
fn to_json(&self) -> String {
format!(
" {{\"name\": \"{}\", \"students\": {}, \"teachers\": {} }}",
self.name,
self.s.to_json(),
self.t.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-task v0.3.31
Compiling pin-utils v0.1.0
Compiling syn v2.0.109
Compiling slab v0.4.11
Compiling futures-io v0.3.31
Compiling memchr v2.7.6
Compiling pin-project-lite v0.2.16
Compiling solution v0.1.0 (/tmp/d20251106-1757769-zlvutz/solution)
warning: trait `ToJson` is never used
--> src/lib.rs:1:7
|
1 | trait ToJson {
| ^^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: fields `name`, `age`, and `s` are never read
--> src/lib.rs:62:5
|
61 | pub struct Student {
| ------- fields in this struct
62 | name: String,
| ^^^^
63 | age: i32,
| ^^^
64 | s: Spec,
| ^
warning: associated function `new` is never used
--> src/lib.rs:68:8
|
67 | impl Student {
| ------------ associated function in this implementation
68 | fn new(name: String, age: i32, s: Spec) -> Self {
| ^^^
warning: fields `name`, `age`, `s`, and `t` are never read
--> src/lib.rs:88:5
|
87 | pub struct Teacher {
| ------- fields in this struct
88 | name: String,
| ^^^^
89 | age: i32,
| ^^^
90 | s: Vec<Spec>,
| ^
91 | t: Title,
| ^
warning: associated function `new` is never used
--> src/lib.rs:95:8
|
94 | impl Teacher {
| ------------ associated function in this implementation
95 | fn new(name: String, age: i32, s: Vec<Spec>, t: Title) -> Self {
| ^^^
warning: struct `University` is never constructed
--> src/lib.rs:122:8
|
122 | struct University<T: ToJson> {
| ^^^^^^^^^^
warning: associated function `new` is never used
--> src/lib.rs:129:8
|
128 | impl<T: ToJson> University<T> {
| ----------------------------- associated function in this implementation
129 | fn new(name: String, s: Vec<Student>, t: Vec<T>) -> Self {
| ^^^
warning: `solution` (lib) generated 7 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:29:5
|
26 | pub enum Spec {
| ---- variants in this enum
...
29 | KN,
| ^^
30 | I,
| ^
31 | M,
| ^
|
= note: `#[warn(dead_code)]` on by default
warning: variants `Assistant` and `Doctor` are never constructed
--> tests/../src/lib.rs:47:5
|
45 | pub enum Title {
| ----- variants in this enum
46 | Professor,
47 | Assistant,
| ^^^^^^^^^
48 | Doctor,
| ^^^^^^
warning: `solution` (test "solution_test") generated 2 warnings
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.11s
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