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use core::ops::{Sub, SubAssign};
use slice_trait::Slice;
use super::SliceVisit;
#[const_trait]
pub trait SliceSubAssign<T>: Slice<Item = T>
{
/// Subtracts each element in the slice by `rhs`.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// let mut x = [1, 2, 3, 4, 5, 6, 7, 8];
///
/// x.sub_assign_all(2);
///
/// assert_eq!(x, [-1, 0, 1, 2, 3, 4, 5, 6]);
/// ```
fn sub_assign_all<Rhs>(&mut self, rhs: Rhs)
where
T: SubAssign<Rhs>,
Rhs: Copy;
/// Asynchronously subtracts each element in the slice by `rhs`.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// # tokio_test::block_on(async {
/// let mut x = [1, 2, 3, 4, 5, 6, 7, 8];
///
/// x.sub_assign_all_async(2).await;
///
/// assert_eq!(x, [-1, 0, 1, 2, 3, 4, 5, 6]);
/// # });
/// ```
#[cfg(feature = "alloc")]
async fn sub_assign_all_async<Rhs>(&mut self, rhs: Rhs)
where
T: SubAssign<Rhs>,
Rhs: Copy;
/// TODO
fn rsub_assign_all<Lhs>(&mut self, lhs: Lhs)
where
Lhs: Copy + Sub<T, Output = T>;
/// TODO
#[cfg(feature = "alloc")]
async fn rsub_assign_all_async<Lhs>(&mut self, lhs: Lhs)
where
Lhs: Copy + Sub<T, Output = T>;
}
impl<T> SliceSubAssign<T> for [T]
{
fn sub_assign_all<Rhs>(&mut self, rhs: Rhs)
where
T: SubAssign<Rhs>,
Rhs: Copy
{
self.visit_mut(|x| *x -= rhs)
}
#[cfg(feature = "alloc")]
async fn sub_assign_all_async<Rhs>(&mut self, rhs: Rhs)
where
T: SubAssign<Rhs>,
Rhs: Copy
{
self.visit_mut_async(async |x| *x -= rhs).await
}
fn rsub_assign_all<Lhs>(&mut self, lhs: Lhs)
where
Lhs: Copy + Sub<T, Output = T>
{
self.visit_mut(|x| unsafe {
core::ptr::write(x, lhs - core::ptr::read(x))
})
}
#[cfg(feature = "alloc")]
async fn rsub_assign_all_async<Lhs>(&mut self, lhs: Lhs)
where
Lhs: Copy + Sub<T, Output = T>
{
self.visit_mut_async(async |x| unsafe {
core::ptr::write(x, lhs - core::ptr::read(x))
}).await
}
}
#[cfg(test)]
mod test
{
#[test]
fn it_works()
{
}
}