Clone
Sometimes you want to make a copy of a value. The Clone
trait accomplishes
this.
Speaker Notes
This slide should take about 2 minutes.
-
The idea of
Clone
is to make it easy to spot where heap allocations are occurring. Look for.clone()
and a few others likevec!
orBox::new
. -
It’s common to “clone your way out” of problems with the borrow checker, and return later to try to optimize those clones away.
-
clone
generally performs a deep copy of the value, meaning that if you e.g. clone an array, all of the elements of the array are cloned as well. -
The behavior for
clone
is user-defined, so it can perform custom cloning logic if needed.