Trait MapMut

pub trait MapMut: UserData {
    type Err: Debug;

    // Required method
    fn map_mut<F, U>(&self, op: F) -> Result<U, Self::Err>
       where F: FnOnce(&mut Self::Target) -> U;
}

Trait for wrappers that can be mapped mutably.

Required Associated Types

type Err: Debug

Required Methods

fn map_mut<F, U>(&self, op: F) -> Result<U, Self::Err>

where F: FnOnce(&mut Self::Target) -> U,

Maps a &mut T to U. Called for methods that take &mut self.

Implementations of this method must not panic. Failures should be indicated by returning Err.

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.

Implementors

impl<T> MapMut for LocalCellData<T>

where T: NativeClass,

type Err = LocalCellError

impl<T, OPT> MapMut for MutexData<T, OPT>

where T: NativeClass + Send, OPT: LockOptions,

type Err = LockFailed

impl<T, OPT> MapMut for RwLockData<T, OPT>

where T: NativeClass + Send + Sync, OPT: LockOptions,

type Err = LockFailed