Macro rkyv::project_struct

macro_rules! project_struct {
    ($struct:ident: $ty:path => $field:tt) => { ... };
    ($struct:ident: $struct_ty:path => $field:tt: $field_ty:path) => { ... };
}

Maps a mutable MaybeUninit struct reference to a mutable MaybeUninit field reference.

This is primarily used to succintly resolve the fields of structs into the output for resolve().

Example

use rkyv::project_struct;
use core::mem::MaybeUninit;

struct Test {
    a: i32,
    b: u8,
}

let result = unsafe {
    let mut result = MaybeUninit::<Test>::uninit();
    let out = &mut result;
    project_struct!(out: Test => a: i32).as_mut_ptr().write(42);
    project_struct!(out: Test => b: u8).as_mut_ptr().write(10);
    result.assume_init()
};

assert_eq!(result.a, 42);
assert_eq!(result.b, 10);