TraitStack

Store trait object and vtable using two Vec.

Provides efficient heterogeneous list when the elements don't need to get resorted.

Comparion to Vec<Box<dyn Trait>>

Vec<Box<dyn Trait>> makes allocation per element. Inserting many objects can hurt performance due to allocation.

TraitStack stack object to its inner vector. It makes moving element by index impossible and only can be used as stack. but very fast on insertion.

See diagram for detailed structure.

Diagram

no_std

No support.

Example

let mut stack = TraitStack::<dyn Debug>::new();
stack.push("str");
stack.push(1);
stack.push(28342.2);
println!("{:?}", stack); // Print ["str", 1, 28342.2]