unsized-vec

UnsizedVec<T> is like Vec<T>, but T can be ?Sized.

Features

• Similar API to Vec.
• Same time complexity as Vec for indexing, push, pop, insert, remove (more or less)
  • Exception: when T's alignment isn't fixed at compile-time, adding a new element to the Vec with a greater alignment than all elements currently present will take $\mathcal{O}(n)$ time, and will most likely reallocate.
• For T: Sized, only one heap allocation, approximately same memory layout as Vec.
• For unsized T, two heap allocations (one for the elements, one for the pointer metadata).
• #[no_std] (but requires alloc).
• Experimental, nightly-only.

Example

```rust

![feature(unsizedfnparams)]

use core::fmt::Debug; use unsizedvec::{*, emplace::boxnew_with};

// Box::new() necessary only to coerce the values to trait objects. let obj: Box = Box::new(1); let obj2: Box = Box::new((97u128, "oh noes")); let mut vec: UnsizedVec = unsizedvec![*obj, *obj2]; for traitobj in &vec { dbg!(traitobj); };

assert_eq!(vec.len(), 2);

let popped = boxnewwith(|e| vec.pop_unwrap(e)); dbg!(&*popped);

assert_eq!(vec.len(), 1); ```