rust armanriazi type wraper mutable
Rust: Type Wrapper and Mutability
In Rust, you can create a type wrapper by defining a new struct and implementing the desired traits for that struct. To make the type mutable, you can use the mut
keyword when declaring the struct or its fields.
Here's an example of creating a type wrapper in Rust:
struct MyWrapper<T> {
value: T,
}
impl<T> MyWrapper<T> {
fn new(value: T) -> Self {
MyWrapper { value }
}
fn get(&self) -> &T {
&self.value
}
fn get_mut(&mut self) -> &mut T {
&mut self.value
}
}
In this example, MyWrapper
is a generic struct that wraps a value of type T
. The new
function is used to create a new instance of MyWrapper
with an initial value. The get
method returns a reference to the wrapped value, while the get_mut
method returns a mutable reference to the wrapped value.
You can use the type wrapper as follows:
fn main() {
let mut wrapper = MyWrapper::new(42);
println!("Value: {}", wrapper.get());
*wrapper.get_mut() = 24;
println!("New value: {}", wrapper.get());
}
In this example, we create a mutable instance of MyWrapper
with an initial value of 42. We then print the value using the get
method. After that, we use the get_mut
method to get a mutable reference to the wrapped value and update it to 24. Finally, we print the updated value.
I hope this helps! Let me know if you have any further questions.