Struct try_lazy_init::Lazy [−][src]
pub struct Lazy<T> { /* fields omitted */ }
Expand description
Lazy<T>
is a lazily initialized synchronized holder type. You can think
of it as a LazyTransform
where the initial type doesn’t exist.
Implementations
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!
Tries to 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 successfully 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 succeeds
and returns it, so think carefully about what you want to put inside!
Errors
Iff f
returns a Result::Err
, this error is returned verbatim.
Trait Implementations
Auto Trait Implementations
impl<T> !RefUnwindSafe for Lazy<T>
impl<T> UnwindSafe for Lazy<T> where
T: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more