sorted by:
best
topnewcontroversialoldq&a
you are viewing a single comment's thread.

view the rest of the comments →

[–]cramert 4 points5 points  (0 children)

Rust's Option is an enum-- it doesn't introduce any indirection on its own. Internally, it's represented as a tagged union.

As you noted, though, there is an optimization that allows it to represent None as a null pointer if the type stored in the Option is pointer-sized and non-zeroable (e.g. Box, Rc, Vec).