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split_at.rs
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54 lines (49 loc) · 1.19 KB
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use crate::imp_prelude::*;
/// Arrays and similar that can be split along an axis
pub(crate) trait SplitAt
{
fn split_at(self, axis: Axis, index: usize) -> (Self, Self)
where Self: Sized;
}
pub(crate) trait SplitPreference: SplitAt
{
#[allow(dead_code)] // used only when Rayon support is enabled
fn can_split(&self) -> bool;
fn split_preference(&self) -> (Axis, usize);
fn split(self) -> (Self, Self)
where Self: Sized
{
let (axis, index) = self.split_preference();
self.split_at(axis, index)
}
}
impl<D> SplitAt for D
where D: Dimension
{
fn split_at(self, axis: Axis, index: Ix) -> (Self, Self)
{
let mut d1 = self;
let mut d2 = d1.clone();
let i = axis.index();
let len = d1[i];
d1[i] = index;
d2[i] = len - index;
(d1, d2)
}
}
impl<A, D> SplitAt for ArrayViewMut<'_, A, D>
where D: Dimension
{
fn split_at(self, axis: Axis, index: usize) -> (Self, Self)
{
self.split_at(axis, index)
}
}
impl<A, D> SplitAt for RawArrayViewMut<A, D>
where D: Dimension
{
fn split_at(self, axis: Axis, index: usize) -> (Self, Self)
{
self.split_at(axis, index)
}
}