allow newtype idiom

[ibotty]

When I have e.g.

#[derive(Deserialize, TryFromMultipart)]
struct Form {
  test: MyNewtype,
}

struct MyNewtype(String)

It complains that MyNewtype does not implement TryFromChunks. How can I use a newtype without writing a custom implementation?

[murar8]

Hi, the derive macro doesn't know how to transform a stream of data to a custom type so implementing TryFromChunks is unavoidable.

[murar8]

In this case the implementation would be really easy given that you can get the value by using String::TryFromChunks and wrap it.

[murar8]

For reference: https://docs.rs/axum_typed_multipart/latest/axum_typed_multipart/#custom-types