Crate lazy_init

A wrapper for lazy initialized values.

Unlike lazy_static, this crate does not provide concurrency safety. The value MUST be used after only ONE initialization. However, it can be more efficient, as there is no need to check whether other threads are also performing initialization at the same time.

Examples

use lazy_init::LazyInit;

static VALUE: LazyInit<u32> = LazyInit::new();
assert!(!VALUE.is_init());
// println!("{}", *VALUE); // panic: use uninitialized value
assert_eq!(VALUE.try_get(), None);

VALUE.init_by(233);
// VALUE.init_by(666); // panic: already initialized
assert!(VALUE.is_init());
assert_eq!(*VALUE, 233);
assert_eq!(VALUE.try_get(), Some(&233));

Structs

• LazyInit
  A wrapper of a lazy initialized value.