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use core::ops::Neg;
use slice_trait::Slice;
use super::SliceVisit;
#[const_trait]
pub trait SliceNegAssign<T>: Slice<Item = T>
{
/// Negates each element in the slice.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// let mut x = [1, 2, 3, 4, 5, 6, 7, 8];
///
/// x.neg_assign_all();
///
/// assert_eq!(x, [-1, -2, -3, -4, -5, -6, -7, -8]);
/// ```
fn neg_assign_all(&mut self)
where
T: Neg<Output = T>;
/// Asynchronously negates each element in the slice.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// # tokio_test::block_on(async {
/// let mut x = [1, 2, 3, 4, 5, 6, 7, 8];
///
/// x.neg_assign_all_async().await;
///
/// assert_eq!(x, [-1, -2, -3, -4, -5, -6, -7, -8]);
/// # });
/// ```
#[cfg(feature = "alloc")]
async fn neg_assign_all_async(&mut self)
where
T: Neg<Output = T>;
}
impl<T> SliceNegAssign<T> for [T]
{
fn neg_assign_all(&mut self)
where
T: Neg<Output = T>
{
self.visit_mut(|x| unsafe {
core::ptr::write(x, -core::ptr::read(x))
})
}
#[cfg(feature = "alloc")]
async fn neg_assign_all_async(&mut self)
where
T: Neg<Output = T>
{
self.visit_mut_async(async |x| unsafe {
core::ptr::write(x, -core::ptr::read(x))
}).await
}
}
#[cfg(test)]
mod test
{
#[test]
fn it_works()
{
}
}