any_vec 0.4.0

Type erased vector [AnyVec]. Allow to store elements of the same type. Have same performance and operations as [std::vec::Vec].

You can downcast type erased [AnyVec] to concrete [AnyVecTyped<Element>] with downcast-family. Or use [AnyVec]'s type erased operations, which operate on [u8] byte basis.

use any_vec::AnyVec;
let mut vec: AnyVec = AnyVec::new::<String>();
{
// Typed operations.
let mut vec = vec.downcast_mut::<String>().unwrap();
vec.push(String::from("0"));
vec.push(String::from("1"));
vec.push(String::from("2"));
}

let mut other_vec: AnyVec = AnyVec::new::<String>();
// Fully type erased element move from one vec to another
// without intermediate mem-copies.
//
// Equivalent to:
//
// let element = vec.swap_remove(0);
// other.push(element);
unsafe{
let element: &mut[u8] = other_vec.push_uninit();    // allocate element
vec.swap_remove_into(0, element);                   // swap_remove
}

// Output 2 1
for s in vec.downcast_ref::<String>().unwrap().as_slice(){
println!("{}", s);
}

[AnyVec] is [Send]able if it's elements are. [AnyVec] is [Sync]able if it's elements are.