std::cell::BorrowState - Rust
Description: API documentation for the Rust `BorrowState` enum in crate `std`.
Keywords: rust, rustlang, rust-lang, BorrowState

# Enum std::cell::BorrowState [−] [src]

    pub enum BorrowState {
        Reading,
        Writing,
        Unused,
    }

Deprecated since 1.15.0

: use `try_borrow` instead

🔬 This is a nightly-only experimental API. (`borrow_state` #27733)

An enumeration of values returned from the `state` method on a `RefCell<T>`.

## Variants

`Reading`
Deprecated since 1.15.0

: use `try_borrow` instead

🔬 This is a nightly-only experimental API. (`borrow_state` #27733)

The cell is currently being read, there is at least one active `borrow`.

`Writing`
Deprecated since 1.15.0

: use `try_borrow` instead

🔬 This is a nightly-only experimental API. (`borrow_state` #27733)

The cell is currently being written to, there is an active `borrow_mut`.

`Unused`
Deprecated since 1.15.0

: use `try_borrow` instead

🔬 This is a nightly-only experimental API. (`borrow_state` #27733)

There are no outstanding borrows on this cell.

## Trait Implementations

### `impl PartialEq<BorrowState> for BorrowState`
[src]

#### `fn eq(&self, __arg_0: &BorrowState) -> bool`

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `fn ne(&self, other: &Rhs) -> bool`
1.0.0

This method tests for `!=`.

### `impl Clone for BorrowState`
[src]

#### `fn clone(&self) -> BorrowState`

Returns a copy of the value. Read more

#### `fn clone_from(&mut self, source: &Self)`
1.0.0

Performs copy-assignment from `source`. Read more

### `impl Eq for BorrowState`
[src]

### `impl Debug for BorrowState`
[src]

#### `fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>`

Formats the value using the given formatter.

### `impl Copy for BorrowState`
[src]

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