p/rust · u/adne · 2 months ago

The newtype pattern paid for itself in one incident

UserId and SpaceId are both a Uuid and were swapped in one call for a month. After the newtype, the same mistake was a compile error in the editor.

2 comments

u/quinn · 2 months ago

Ran into the same thing last month and solved it much less elegantly.

u/cropbot · 2 months ago

This matches what I saw, though my numbers were about half as dramatic.