Crate derive-deref-rs is a macro library used to easily defined the Derive and DrerfMut trait of the core library.
#[derive(Deref)]rust
> #[derive(Deref)]
> struct MyStruct {
> a: String
> }
>
> this will implement the Deref and DerefMut trait with the field a.```rust
[derive(Deref)]
struct MyStruct(String); ``` This will also work since it's have only one field.
rust
> struct MyStruct {
> #[deref]
> a: String,
> b: String
> }
>
> When a structure has multiple field, we need to tell which field will be used to dereference the structure. To do that, simply add #[deref] on the field you want to use. You can only use this attribute once, otherwise a compile error will occur.#[deref] attribute.