Struct lazy_init::Lazy
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pub struct Lazy<T> { /* fields omitted */ }Lazy<T> is a lazily initialized synchronized holder type. You can think
of it as a LazyTransform where the initial type doesn't exist.
Methods
impl<T> Lazy<T>[src]
fn new() -> Lazy<T>
Construct a new, uninitialized Lazy<T>.
fn get_or_create<'a, F>(&'a self, f: F) -> &'a T where F: FnOnce() -> T
Get a reference to the contained value, invoking f to create it
if the Lazy<T> is uninitialized. It is guaranteed that if multiple
calls to get_or_create race, only one will invoke its closure, and
every call will receive a reference to the newly created value.
The value stored in the Lazy<T> is immutable after the closure returns
it, so think carefully about what you want to put inside!
fn get<'a>(&'a self) -> Option<&'a T>
Get a reference to the contained value, returning Some(ref) if the
Lazy<T> has been initialized or None if it has not. It is
guaranteed that if a reference is returned it is to the value inside
the Lazy<T>.