Trait Map

pub trait Map: UserData {
    type Err: Debug;

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

Trait for wrappers that can be mapped immutably.

Required Associated Types

type Err: Debug

Required Methods

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

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

Maps a &T to U. Called for methods that take &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> Map for Aether<T>

where T: NativeClass + Copy + Default,

type Err = Infallible

impl<T> Map for ArcData<T>

where T: NativeClass + Send + Sync,

type Err = Infallible

impl<T> Map for LocalCellData<T>

where T: NativeClass,

type Err = LocalCellError

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

where T: NativeClass + Send, OPT: LockOptions,

type Err = LockFailed

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

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

type Err = LockFailed