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A trait for dereferencing a value to provide transparent access to its contents. Implementing this trait allows a type to behave like its inner type, enabling direct access to the inner type’s fields. Note: The Deref mechanism is limited and cannot be used to implicitly convert a type to its target type when passing arguments to functions. For example, if you have a function that takes an Inner, you cannot pass an Outer to it even if Outer implements Deref.

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Signature

pub trait Deref

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Examples

struct Wrapper { inner: T }

impl WrapperDeref of Deref> {
    type Target = T;
    fn deref(self: Wrapper) -> T { self.inner }
}

let wrapped = Wrapper { inner: 42 };
assert!(wrapped.deref() == 42);

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Trait functions

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deref

Returns the dereferenced value.

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Signature

fn deref(self: T) -> DerefTarget

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Trait types

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Target

The type of the dereferenced value.

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Signature

type Target;