Kolsky / late_init

late_init

Partially initialize fields with the rest filled as defaults.

Provides a LateInit derive macro which brings in scope a struct NameLateInit created from struct Name definition.

Then it can be used as follows:

#[derive(Defailt)]
struct HasDefault;
struct NoDefault;

#[derive(LateInit)]
struct Name {
    a: HasDefault,
    b: NoDefault,
    c: HasDefault,
    /*insert multiple field defs similar to a*/
    x: HasDefault,
    y: HasDefault,
    z: NoDefault,
}

fn create_name() -> Name {
    NameLateInit::default()
        .b(NoDefault) // You have to provide fields which do not have default impl
        .x(HasDefault) // These are optional
        .z(NoDefault)
        .finish()
}

May as well serve as an alternative to derive-new.

License

^{Licensed under either of Apache License, Version 2.0 or MIT license at your option.}
_{Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.}