Trait MappableDeref 

pub trait MappableDeref<'a>: Deref + SealedMappableDeref {
    // Required method
    fn map<U, F>(self, f: F) -> impl MappableDeref<'a, Target = U>
       where U: ?Sized + 'a,
             F: FnOnce(&Self::Target) -> &U;
}

This trait provides compatibility between &T and parking_lot::RwLockReadGuard

Required Methods

fn map<U, F>(self, f: F) -> impl MappableDeref<'a, Target = U>

where U: ?Sized + 'a, F: FnOnce(&Self::Target) -> &U,

This method is similar to parking_lot::RwLockReadGuard::map and its sibling methods.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<'a, T> MappableDeref<'a> for &'a T

where T: ?Sized,

fn map<U, F>(self, f: F) -> impl MappableDeref<'a, Target = U>

where U: ?Sized + 'a, F: FnOnce(&T) -> &U,

impl<'a, T> MappableDeref<'a> for MappedRwLockReadGuard<'a, T>

where T: ?Sized + 'a,

fn map<U, F>(self, f: F) -> impl MappableDeref<'a, Target = U>

where U: ?Sized + 'a, F: FnOnce(&T) -> &U,

impl<'a, T> MappableDeref<'a> for RwLockReadGuard<'a, T>

where T: ?Sized + 'a,

fn map<U, F>(self, f: F) -> impl MappableDeref<'a, Target = U>

where U: ?Sized + 'a, F: FnOnce(&T) -> &U,

Implementors