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add zh/advanced-traits.md

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sunface
2022-03-08 17:15:53 +08:00
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zh-CN/src/generics-traits/advanced-traits.md
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@ -1,7 +1,7 @@
# Advance Traits
# 进一步深入特征
## Associated types
The use of "Associated types" improves the overall readability of code by moving inner types locally into a trait as output types. For example :
## 关联类型
关联类型主要用于提升代码的可读性，例如以下代码 :
```rust
pub trait CacheableItem: Clone + Default + fmt::Debug + Decodable + Encodable {
type Address: AsRef<[u8]> + Clone + fmt::Debug + Eq + Hash;
@ -9,15 +9,15 @@ pub trait CacheableItem: Clone + Default + fmt::Debug + Decodable + Encodable {
}
```
Using of `Address` is much more clearable and convenient than `AsRef<[u8]> + Clone + fmt::Debug + Eq + Hash`.
相比 `AsRef<[u8]> + Clone + fmt::Debug + Eq + Hash`， `Address` 的使用可以极大的极少其它类型在实现该特征时所需的模版代码.
1. 🌟🌟🌟
```rust,editable
struct Container(i32, i32);
// USING associated types to re-implement trait Contains.
// trait Container {
// 使用关联类型实现重新实现以下特征
// trait Contains {
// type A;
// type B;