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use slice_trait::Slice;
#[const_trait]
pub trait SliceSplit<T>: Slice<Item = T>
{
/// Returns the lengths before and after a certain index, as if split.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// let values = [1, 2, 3, 4];
///
/// let (len_left, len_right) = values.split_len(1);
///
/// assert_eq!(len_left, 1);
/// assert_eq!(len_right, 3);
/// assert_eq!(len_left + len_right, values.len());
/// ```
fn split_len(&self, mid: usize) -> (usize, usize);
/// Returns the lengths before and after a certain index, as if split from the right.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// let values = [1, 2, 3, 4];
///
/// let (len_left, len_right) = values.rsplit_len(3);
///
/// assert_eq!(len_left, 1);
/// assert_eq!(len_right, 3);
/// assert_eq!(len_left + len_right, values.len());
/// ```
fn rsplit_len(&self, mid: usize) -> (usize, usize);
fn split_ptr(&self, mid: usize) -> (*const T, *const T);
fn split_mut_ptr(&mut self, mid: usize) -> (*mut T, *mut T);
fn rsplit_ptr(&self, mid: usize) -> (*const T, *const T);
fn rsplit_mut_ptr(&mut self, mid: usize) -> (*mut T, *mut T);
/// Splits the slice in two parts, from the right.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// let values = [1, 2, 3, 4];
///
/// let (left, right) = values.rsplit_at(3);
///
/// assert_eq!(left, &[1]);
/// assert_eq!(right, &[2, 3, 4]);
/// ```
fn rsplit_at(&self, mid: usize) -> (&[T], &[T]);
/// Splits the slice in two parts, from the right.
///
/// # Example
///
/// ```rust
/// use slice_ops::ops::*;
///
/// let mut values = [1, 2, 3, 4];
///
/// let (left, right) = values.rsplit_at_mut(3);
///
/// assert_eq!(left, &mut [1]);
/// assert_eq!(right, &mut [2, 3, 4]);
/// ```
fn rsplit_at_mut(&mut self, mid: usize) -> (&mut [T], &mut [T]);
}
impl<T> const SliceSplit<T> for [T]
{
fn split_len(&self, mid: usize) -> (usize, usize)
{
crate::split_len(self.len(), mid)
}
fn rsplit_len(&self, mid: usize) -> (usize, usize)
{
crate::rsplit_len(self.len(), mid)
}
fn split_ptr(&self, mid: usize) -> (*const T, *const T)
{
let ptr = self.as_ptr();
(ptr, unsafe {ptr.add(self.split_len(mid).0)})
}
fn split_mut_ptr(&mut self, mid: usize) -> (*mut T, *mut T)
{
let ptr = self.as_mut_ptr();
(ptr, unsafe {ptr.add(self.split_len(mid).0)})
}
fn rsplit_ptr(&self, mid: usize) -> (*const T, *const T)
{
let ptr = self.as_ptr();
(ptr, unsafe {ptr.add(self.rsplit_len(mid).0)})
}
fn rsplit_mut_ptr(&mut self, mid: usize) -> (*mut T, *mut T)
{
let ptr = self.as_mut_ptr();
(ptr, unsafe {ptr.add(self.rsplit_len(mid).0)})
}
fn rsplit_at(&self, mid: usize) -> (&[T], &[T])
{
assert!(mid <= self.len());
self.split_at(self.len() - mid)
}
fn rsplit_at_mut(&mut self, mid: usize) -> (&mut [T], &mut [T])
{
assert!(mid <= self.len());
self.split_at_mut(self.len() - mid)
}
}
#[cfg(test)]
mod test
{
#[test]
fn it_works()
{
}
}