Struct grin_util::OneTime

pub struct OneTime<T> { /* fields omitted */ }

Encapsulation of a RwLock<Option> for one-time initialization. This implementation will purposefully fail hard if not used properly, for example if not initialized before being first used (borrowed).

Methods

impl<T> OneTime<T> where     T: Clone,

pub fn new() -> OneTime<T>

Builds a new uninitialized OneTime.

pub fn init(&self, value: T)

Initializes the OneTime, should only be called once after construction. Will panic (via assert) if called more than once.

pub fn borrow(&self) -> T

Borrows the OneTime, should only be called after initialization. Will panic (via expect) if called before initialization.

Trait Implementations

impl<T: Clone> Clone for OneTime<T>

fn clone(&self) -> OneTime<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.