custom index for Vec<T> (eg 32bit indices in 64 bit)

• rust-blog

  63 6,751 6.6 Rust

  Educational blog posts for Rust beginners

It's pretty trivial to implement your own newtype wrapper around Vec with its own Index impl.

• index-list

  3 4 4.6 Rust

  A doubly-linked list implementation in safe Rust using vector indexes

I implemented a doubly-linked list in safe Rust, where I use Option as an Index type. This gives me an optional u32 in 4 bytes. You can find my lib.rs code on GitHub and it starts with the Index struct. It also implements From for u32, u64 and usize. Maybe you can take inspiration from there. In that code the user isn't supposed to create the Indexes themselves m but get them from the list as they traverse them. That is why most methods are private.

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