use pin_project_lite::pin_project;
use std::marker::PhantomPinned;

struct Inner<T> {
    val: T,
}

pin_project! {
    struct Foo<T, U> {
        #[pin]
        inner: Inner<T>,
        other: U,
    }
}

pin_project! {
    pub struct TrivialBounds {
        #[pin]
        field1: PhantomPinned,
    }
}

pin_project! {
    struct Bar<'a, T, U> {
        #[pin]
        inner: &'a mut Inner<T>,
        other: U,
    }
}

fn is_unpin<T: Unpin>() {}

fn main() {
    is_unpin::<Foo<PhantomPinned, ()>>(); //~ ERROR E0277
    is_unpin::<Foo<(), PhantomPinned>>(); // Ok
    is_unpin::<Foo<PhantomPinned, PhantomPinned>>(); //~ ERROR E0277

    is_unpin::<TrivialBounds>(); //~ ERROR E0277

    is_unpin::<Bar<'_, PhantomPinned, PhantomPinned>>(); //~ Ok
}