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Make library usable in no_std environments. #1

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Make library usable in no_std environments. #1

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22 changes: 12 additions & 10 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -182,10 +182,12 @@
//! [`Unpinned`]: struct.Unpinned.html
//! [`!Unpin`]: https://doc.rust-lang.org/std/pin/index.html#unpin

use std::marker::PhantomData;
use std::ops::Deref;
use std::ops::DerefMut;
use std::pin::Pin;
#![cfg_attr(not(test), no_std)]

use core::marker::PhantomData;
use core::ops::Deref;
use core::ops::DerefMut;
use core::pin::Pin;

/// Struct that represents data that is pinned to the stack, at the point of declaration.
///
Expand Down Expand Up @@ -335,7 +337,7 @@ where
/// [`PinStack`]: type.PinStack.html
pub struct Unpinned<U, T: FromUnpinned<U>> {
u: U,
t: std::marker::PhantomData<T>,
t: core::marker::PhantomData<T>,
}

unsafe impl<U, T: FromUnpinned<U>> FromUnpinned<Unpinned<U, T>> for T {
Expand Down Expand Up @@ -364,15 +366,15 @@ macro_rules! internal_pin_stack {
let $id: $crate::PinStack<_> = unsafe {
let $id = $crate::StackPinned::new(&mut $id);

std::pin::Pin::new_unchecked($id)
core::pin::Pin::new_unchecked($id)
};
};
(mut $id:ident) => {
// Shadow the original binding so that it can't directly be accessed ever again.
let mut $id: $crate::PinStack<_> = unsafe {
let $id = $crate::StackPinned::new(&mut $id);

std::pin::Pin::new_unchecked($id)
core::pin::Pin::new_unchecked($id)
};
};
}
Expand All @@ -383,7 +385,7 @@ where
Dest: FromUnpinned<Source>,
{
let (dest, data) = FromUnpinned::<Source>::from_unpinned(source);
std::ptr::write(pdest, dest);
core::ptr::write(pdest, dest);
FromUnpinned::<Source>::on_pin(&mut *pdest, data);
}

Expand Down Expand Up @@ -468,8 +470,8 @@ mod tests {
use super::FromUnpinned;
use super::PinStack;
use super::Unpinned;
use std::marker::PhantomPinned;
use std::ptr::NonNull;
use core::marker::PhantomPinned;
use core::ptr::NonNull;

struct Unmovable {
data: String,
Expand Down