Yeah, except when it doesn't follow the pattern: for example, there is no foo_destroy(), you're supposed to "just" call free() when you're done with it. Used to

Yeah, except when it doesn't follow the pattern: for example, there is no foo_destroy(), you're supposed to "just" call free() when you're done with it. Used to be very common (not sure how it is now), and very frustrating when you link against non-standard allocators.