Pluralize-rs

Pluralize-rs aims to make generic programming in Rust capable of expressing structures which have a generically quantitied element. A type who has the bounds Pluralize<T> could either be a single primitive T or a Vec<T>. A single Pluralize-bound T can be iterated over by calling the pluralize( ) method as can a Pluralize-bound Vec<T>.

The example given in the tests directory is quite reductive, so what is this actually useful for? Imagine you have a perfectly good singly linked list and you want a linked list with multiple link layers. You could just program one, using the singly linked list as a basic template or you could replace your link type (let's call it L) with a generic T: Pluralize<L> and replace your interactions with the link layer with iterators. A little bit of workshopping (to tag the links mostly) and you've repurposed the code for a linked list into essentially a graph (without cycles).
This is the use that I'm programming for, but maybe that will get someone else with more imagination than me off and running with a project either more insane or more practical than that.

Limitations

The technique used to pluralize single primitives is only able to yield ::slice family iterators. You can't to my knowledge adapt this to a more complex structure or iteration scheme, so no ambiguous tree-walking-or-primitive models without substantial work.

Pluralize currently also is very limited in how you can interact with the type behind the Pluralize binding. If your concrete type is a Vec<T> for example you can't push values to it. That means once you've fed in a vector it's pretty much set in stone as far as it's length is concerned, you still have .pluralize_mut( ) available to manipulate specific values, but you can't remove them.
Realistically this is a TODO for me, it's just not clear to me what pushing or popping a primitive value means or how the code should react to that.