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

    pub struct OnceState {
        // some fields omitted
    }

Unstable (`once_poison` #31688)

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`

Unstable (`once_poison` #31688)

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.

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