perro
/
rust-by-practice
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #339 from Tanish-Eagle/edit 

Edited the newtype
This commit is contained in:
Sunface 2022-12-25 13:06:41 +08:00 committed by GitHub
parent 743de955c9 fc2446f4f8
commit d49d36ba8e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
en/src/newtype-sized.md
View File

@ -26,7 +26,7 @@ fn main() {
}
```
2. 🌟 Hide the methods of the original type
2. 🌟 Hide the methods of the original type.
```rust,editable
/* Make it workd */
struct Meters(u32);
@ -41,7 +41,7 @@ fn main() {
}
```
3. 🌟🌟 The `newtype` idiom gives compile time guarantees that the right type of value is suplied to a program.
3. 🌟🌟 The `newtype` idiom gives compile time guarantees that the right type of value is supplied to a program.
```rust,editable
/* Make it work */
struct Years(i64);
@ -61,7 +61,7 @@ impl Days {
}
}
// an age verification function that checks age in years, must be given a value of type Years.
// An age verification function that checks age in years, must be given a value of type Years.
fn old_enough(age: &Years) -> bool {
age.0 >= 18
}
@ -98,12 +98,12 @@ fn main() {
assert_eq!(format!("{}",d), "There are still 30 meters left");
}
/* implement calculate_distance */
/* Implement calculate_distance */
fn calculate_distance
```
## Type alias
The most importance of type alias is to improve the readability of our codes.
Type alias is important to improve the readability of our code.
```rust
type Thunk = Box<dyn Fn() + Send + 'static>;
@ -150,7 +150,7 @@ fn main() {
}
```
6. 🌟🌟 There are a few preserved alias in Rust, one of which can be used in `impl` blocks.
6. 🌟🌟 There are a few preserved aliases in Rust, one of which can be used in `impl` blocks.
```rust,editable
enum VeryVerboseEnumOfThingsToDoWithNumbers {
Add,
@ -193,7 +193,7 @@ fn main() {
}
```
9. 🌟🌟 Trait is also a unsized type
9. 🌟🌟 Trait is also an unsized type
```rust,editable
/* Make it work in two ways */
use std::fmt::Display;