Struct dereffer::DerefsTo

pub struct DerefsTo<Inner, Ref: ?Sized> { /* private fields */ }

A struct that holds an inner value and a function that is used deref the Inner value into a &Ref.

As with Deref, the dereffer function must not fail. It typically just accesses an arbitrary field reachable from Inner.

This is also useful to prevent a caller from accessing all of Inner, rather only giving them access to Ref.

Implementations

impl<Inner, Ref: ?Sized> DerefsTo<Inner, Ref>

pub const fn new(inner: Inner, deref_func: fn(_: &Inner) -> &Ref) -> Self

impl<Inner, Ref> DerefsTo<Inner, Ref>where Inner: Deref<Target = Ref>, Ref: ?Sized,

pub const fn new_default(inner: Inner) -> Self

Creates a new wrapper with the default, simple deref function, Deref::deref().

Trait Implementations

impl<Inner, Ref: ?Sized> Deref for DerefsTo<Inner, Ref>

type Target = Ref

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.