std::sync::OnceState - Rust
Description: API documentation for the Rust `OnceState` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, OnceState

# Struct std::sync::OnceState [−] [src]

    pub struct OnceState { /* fields omitted */ }

🔬 This is a nightly-only experimental API. (`once_poison` #33577)

State yielded to the `call_once_force` method which can be used to query whether the `Once` was previously poisoned or not.

## Methods

### `impl OnceState`
[src]

#### `fn poisoned(&self) -> bool`

🔬 This is a nightly-only experimental API. (`once_poison` #33577)

Returns whether the associated `Once` has been poisoned.

Once an initalization routine for a `Once` has panicked it will forever indicate to future forced initialization routines that it is poisoned.

## Trait Implementations

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

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

Formats the value using the given formatter.

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