projection.rs - mozsearch

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use pin_utils::{unsafe_pinned, unsafe_unpinned, pin_mut};

use std::pin::Pin;

use std::marker::Unpin;

struct Foo<T1, T2> {

    field1: T1,

    field2: T2,

impl<T1, T2> Foo<T1, T2> {

    unsafe_pinned!(field1: T1);

    unsafe_unpinned!(field2: T2);

impl<T1: Unpin, T2> Unpin for Foo<T1, T2> {} // Conditional Unpin impl

#[test]

fn projection() {

    let foo = Foo { field1: 1, field2: 2 };

    pin_mut!(foo);

    let x1: Pin<&mut i32> = foo.as_mut().field1();

    assert_eq!(*x1, 1);

    let x2: &mut i32 = foo.as_mut().field2();

    assert_eq!(*x2, 2);