blob: 7957cafdd92be7fa8e08ce71d0e8010376210a7e [file] [log] [blame]
/// Pins a value on the stack.
///
/// ```
/// # #![feature(pin)]
/// # #[macro_use] extern crate pin_utils;
/// # use core::mem::PinMut;
/// # struct Foo {}
/// let foo = Foo { /* ... */ };
/// pin_mut!(foo);
/// let _: PinMut<Foo> = foo;
/// ```
#[macro_export]
macro_rules! pin_mut {
($($x:ident),*) => { $(
// Move the value to ensure that it is owned
let mut $x = $x;
// Shadow the original binding so that it can't be directly accessed
// ever again.
#[allow(unused_mut)]
let mut $x = unsafe {
$crate::core_reexport::mem::PinMut::new_unchecked(&mut $x)
};
)* }
}