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extern crate pin_project as pin_project_orig;
extern crate self as pin_project;
pub use ::pin_project_orig::*;
mod __private {
pub use ::pin_project_orig::__private::*;
pub trait Drop {}
}
use std::{marker::PhantomPinned, mem};
#[pin_project] //~ ERROR conflicting implementations of trait `_::FooMustNotImplDrop`
struct S {
#[pin]
f: (u8, PhantomPinned),
}
impl Drop for S {
fn drop(&mut self) {
let prev = &self.f.0 as *const _ as usize;
let moved = mem::take(&mut self.f); // move pinned field
let moved = &moved.0 as *const _ as usize;
assert_eq!(prev, moved); // panic
}
}
fn main() {
let mut x = Box::pin(S { f: (1, PhantomPinned) });
let _f = x.as_mut().project().f; // first mutable access
}