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TODO.md

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TODO

Some ideas for future development:

Convenient Aliases

Add optional alias = "method_name" argument to create an alias for a conversion implementation:

#[newtype(into(Oranges, alias = "into_oranges" with = "..."))]
struct Apples(u64);

let apple = Apples(1);
let oranges = apple.into_oranges();

Common Base Type Conversions

Similar to the convenient aliases above, but instead of a method name, a base type is specified:

#[newtype(
    base = "NumBytes",
    from(NumBytes, with = "...")
)]
struct NumOsPages(u64);

#[newtype(
    base = "NumBytes",
    from(NumBytes, with = "...")
)]
struct NumWasmPages(u64);

let num_os_pages = NumOsPages(1);
let num_wasm_pages = num_os_pages.into();

Support newtype Arrays and Vectors

Something like:

#[newtype(Array)]
struct Apples([u64; 2]);
#[newtype(Vec)]
struct Oranges(Vec<u64>);

It's not quite clear what it should derive by default:

  1. Index -- make sense as a custom derive, i.e. #newtype(index(...))
  2. FromIterator?
  3. Extend?

There is no clear use case at the moment.

Extend Pattern

Consider a use case of extending functionality. See the extend crate: https://crates.io/crates/extend