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array.rs
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2210 lines (1967 loc) · 62.6 KB
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#![allow(non_snake_case)]
#![allow(
clippy::many_single_char_names,
clippy::deref_addrof,
clippy::unreadable_literal,
clippy::many_single_char_names,
clippy::float_cmp
)]
use defmac::defmac;
use itertools::{enumerate, zip, Itertools};
use ndarray::indices;
use ndarray::prelude::*;
use ndarray::{arr3, rcarr2};
use ndarray::{Slice, SliceInfo, SliceOrIndex};
use std::iter::FromIterator;
macro_rules! assert_panics {
($body:expr) => {
if let Ok(v) = ::std::panic::catch_unwind(|| $body) {
panic!("assertion failed: should_panic; \
non-panicking result: {:?}", v);
}
};
($body:expr, $($arg:tt)*) => {
if let Ok(_) = ::std::panic::catch_unwind(|| $body) {
panic!($($arg)*);
}
};
}
#[test]
fn test_matmul_arcarray() {
let mut A = ArcArray::<usize, _>::zeros((2, 3));
for (i, elt) in A.iter_mut().enumerate() {
*elt = i;
}
let mut B = ArcArray::<usize, _>::zeros((3, 4));
for (i, elt) in B.iter_mut().enumerate() {
*elt = i;
}
let c = A.dot(&B);
println!("A = \n{:?}", A);
println!("B = \n{:?}", B);
println!("A x B = \n{:?}", c);
unsafe {
let result =
ArcArray::from_shape_vec_unchecked((2, 4), vec![20, 23, 26, 29, 56, 68, 80, 92]);
assert_eq!(c.shape(), result.shape());
assert!(c.iter().zip(result.iter()).all(|(a, b)| a == b));
assert!(c == result);
}
}
#[allow(unused)]
fn arrayview_shrink_lifetime<'a, 'b: 'a>(view: ArrayView1<'b, f64>) -> ArrayView1<'a, f64> {
view.reborrow()
}
#[allow(unused)]
fn arrayviewmut_shrink_lifetime<'a, 'b: 'a>(
view: ArrayViewMut1<'b, f64>,
) -> ArrayViewMut1<'a, f64> {
view.reborrow()
}
#[test]
fn test_mat_mul() {
// smoke test, a big matrix multiplication of uneven size
let (n, m) = (45, 33);
let a = ArcArray::linspace(0., ((n * m) - 1) as f32, n as usize * m as usize).reshape((n, m));
let b = ArcArray::eye(m);
assert_eq!(a.dot(&b), a);
let c = ArcArray::eye(n);
assert_eq!(c.dot(&a), a);
}
#[deny(unsafe_code)]
#[test]
fn test_slice() {
let mut A = ArcArray::<usize, _>::zeros((3, 4, 5));
for (i, elt) in A.iter_mut().enumerate() {
*elt = i;
}
let vi = A.slice(s![1.., ..;2, Slice::new(0, None, 2)]);
assert_eq!(vi.shape(), &[2, 2, 3]);
let vi = A.slice(s![.., .., ..]);
assert_eq!(vi.shape(), A.shape());
assert!(vi.iter().zip(A.iter()).all(|(a, b)| a == b));
}
#[deny(unsafe_code)]
#[test]
fn test_slice_ix0() {
let arr = arr0(5);
assert_eq!(arr.slice(s![]), aview0(&5));
}
#[test]
fn test_slice_edge_cases() {
let mut arr = Array3::<u8>::zeros((3, 4, 5));
arr.slice_collapse(s![0..0;-1, .., ..]);
assert_eq!(arr.shape(), &[0, 4, 5]);
let mut arr = Array2::<u8>::from_shape_vec((1, 1).strides((10, 1)), vec![5]).unwrap();
arr.slice_collapse(s![1..1, ..]);
assert_eq!(arr.shape(), &[0, 1]);
}
#[test]
fn test_slice_inclusive_range() {
let arr = array![[1, 2, 3], [4, 5, 6]];
assert_eq!(arr.slice(s![1..=1, 1..=2]), array![[5, 6]]);
assert_eq!(arr.slice(s![1..=-1, -2..=2;-1]), array![[6, 5]]);
assert_eq!(arr.slice(s![0..=-1, 0..=2;2]), array![[1, 3], [4, 6]]);
}
/// Test that the compiler can infer a type for a sliced array from the
/// arguments to `s![]`.
///
/// This test relies on the fact that `.dot()` is implemented for both
/// `ArrayView1` and `ArrayView2`, so the compiler needs to determine which
/// type is the correct result for the `.slice()` call.
#[test]
fn test_slice_infer() {
let a = array![1., 2.];
let b = array![[3., 4.], [5., 6.]];
b.slice(s![..-1, ..]).dot(&a);
// b.slice(s![0, ..]).dot(&a);
}
#[test]
fn test_slice_with_many_dim() {
let mut A = ArcArray::<usize, _>::zeros(&[3, 1, 4, 1, 3, 2, 1][..]);
for (i, elt) in A.iter_mut().enumerate() {
*elt = i;
}
let vi = A.slice(s![..2, .., ..
527E
;2, ..1, ..1, 1.., ..]);
let new_shape = &[2, 1, 2, 1, 1, 1, 1][..];
assert_eq!(vi.shape(), new_shape);
let correct = array![
[A[&[0, 0, 0, 0, 0, 1, 0][..]], A[&[0, 0, 2, 0, 0, 1, 0][..]]],
[A[&[1, 0, 0, 0, 0, 1, 0][..]], A[&[1, 0, 2, 0, 0, 1, 0][..]]]
]
.into_shape(new_shape)
.unwrap();
assert_eq!(vi, correct);
let vi = A.slice(s![..2, 0, ..;2, 0, 0, 1, 0]);
assert_eq!(vi.shape(), &[2, 2][..]);
let correct = array![
[A[&[0, 0, 0, 0, 0, 1, 0][..]], A[&[0, 0, 2, 0, 0, 1, 0][..]]],
[A[&[1, 0, 0, 0, 0, 1, 0][..]], A[&[1, 0, 2, 0, 0, 1, 0][..]]]
];
assert_eq!(vi, correct);
}
#[test]
fn test_slice_range_variable() {
let range = 1..4;
let arr = array![0, 1, 2, 3, 4];
assert_eq!(arr.slice(s![range]), array![1, 2, 3]);
}
#[test]
fn test_slice_args_eval_range_once() {
let mut eval_count = 0;
{
let mut range = || {
eval_count += 1;
1..4
};
let arr = array![0, 1, 2, 3, 4];
assert_eq!(arr.slice(s![range()]), array![1, 2, 3]);
}
assert_eq!(eval_count, 1);
}
#[test]
fn test_slice_args_eval_step_once() {
let mut eval_count = 0;
{
let mut step = || {
eval_count += 1;
-1
};
let arr = array![0, 1, 2, 3, 4];
assert_eq!(arr.slice(s![1..4;step()]), array![3, 2, 1]);
}
assert_eq!(eval_count, 1);
}
#[test]
fn test_slice_array_fixed() {
let mut arr = Array3::<f64>::zeros((5, 2, 5));
let info = s![1.., 1, ..;2];
arr.slice(info);
arr.slice_mut(info);
arr.view().slice_move(info);
arr.view().slice_collapse(info);
}
#[test]
fn test_slice_dyninput_array_fixed() {
let mut arr = Array3::<f64>::zeros((5, 2, 5)).into_dyn();
let info = s![1.., 1, ..;2];
arr.slice(info);
arr.slice_mut(info);
arr.view().slice_move(info);
arr.view().slice_collapse(info.as_ref());
}
#[test]
fn test_slice_array_dyn() {
let mut arr = Array3::<f64>::zeros((5, 2, 5));
let info = &SliceInfo::<_, IxDyn>::new([
SliceOrIndex::from(1..),
SliceOrIndex::from(1),
SliceOrIndex::from(..).step_by(2),
])
.unwrap();
arr.slice(info);
arr.slice_mut(info);
arr.view().slice_move(info);
arr.view().slice_collapse(info);
}
#[test]
fn test_slice_dyninput_array_dyn() {
let mut arr = Array3::<f64>::zeros((5, 2, 5)).into_dyn();
let info = &SliceInfo::<_, IxDyn>::new([
SliceOrIndex::from(1..),
SliceOrIndex::from(1),
SliceOrIndex::from(..).step_by(2),
])
.unwrap();
arr.slice(info);
arr.slice_mut(info);
arr.view().slice_move(info);
arr.view().slice_collapse(info.as_ref());
}
#[test]
fn test_slice_dyninput_vec_fixed() {
let mut arr = Array3::<f64>::zeros((5, 2, 5)).into_dyn();
let info = &SliceInfo::<_, Ix2>::new(vec![
SliceOrIndex::from(1..),
SliceOrIndex::from(1),
SliceOrIndex::from(..).step_by(2),
])
.unwrap();
arr.slice(info.as_ref());
arr.slice_mut(info.as_ref());
arr.view().slice_move(info.as_ref());
arr.view().slice_collapse(info.as_ref());
}
#[test]
fn test_slice_dyninput_vec_dyn() {
let mut arr = Array3::<f64>::zeros((5, 2, 5)).into_dyn();
let info = &SliceInfo::<_, IxDyn>::new(vec![
SliceOrIndex::from(1..),
SliceOrIndex::from(1),
SliceOrIndex::from(..).step_by(2),
])
.unwrap();
arr.slice(info.as_ref());
arr.slice_mut(info.as_ref());
arr.view().slice_move(info.as_ref());
arr.view().slice_collapse(info.as_ref());
}
#[test]
fn test_slice_with_subview() {
let mut arr = ArcArray::<usize, _>::zeros((3, 5, 4));
for (i, elt) in arr.iter_mut().enumerate() {
*elt = i;
}
let vi = arr.slice(s![1.., 2, ..;2]);
assert_eq!(vi.shape(), &[2, 2]);
assert!(vi
.iter()
.zip(arr.index_axis(Axis(1), 2).slice(s![1.., ..;2]).iter())
.all(|(a, b)| a == b));
let vi = arr.slice(s![1, 2, ..;2]);
assert_eq!(vi.shape(), &[2]);
assert!(vi
.iter()
.zip(
arr.index_axis(Axis(0), 1)
.index_axis(Axis(0), 2)
.slice(s![..;2])
.iter()
)
.all(|(a, b)| a == b));
let vi = arr.slice(s![1, 2, 3]);
assert_eq!(vi.shape(), &[]);
assert_eq!(vi, Array0::from_elem((), arr[(1, 2, 3)]));
}
#[test]
fn test_slice_collapse_with_indices() {
let mut arr = ArcArray::<usize, _>::zeros((3, 5, 4));
for (i, elt) in arr.iter_mut().enumerate() {
*elt = i;
}
{
let mut vi = arr.view();
vi.slice_collapse(s![1.., 2, ..;2]);
assert_eq!(vi.shape(), &[2, 1, 2]);
assert!(vi
.iter()
.zip(arr.slice(s![1.., 2..3, ..;2]).iter())
.all(|(a, b)| a == b));
let mut vi = arr.view();
vi.slice_collapse(s![1, 2, ..;2]);
assert_eq!(vi.shape(), &[1, 1, 2]);
assert!(vi
.iter()
.zip(arr.slice(s![1..2, 2..3, ..;2]).iter())
.all(|(a, b)| a == b));
let mut vi = arr.view();
vi.slice_collapse(s![1, 2, 3]);
assert_eq!(vi.shape(), &[1, 1, 1]);
assert_eq!(vi, Array3::from_elem((1, 1, 1), arr[(1, 2, 3)]));
}
// Do it to the ArcArray itself
let elem = arr[(1, 2, 3)];
let mut vi = arr;
vi.slice_collapse(s![1, 2, 3]);
assert_eq!(vi.shape(), &[1, 1, 1]);
assert_eq!(vi, Array3::from_elem((1, 1, 1), elem));
}
#[test]
fn test_multislice() {
macro_rules! do_test {
($arr:expr, $($s:expr),*) => {
{
let arr = $arr;
let copy = arr.clone();
assert_eq!(
arr.multi_slice_mut(($($s,)*)),
($(copy.clone().slice_mut($s),)*)
);
}
};
}
let mut arr = Array1::from_iter(0..48).into_shape((8, 6)).unwrap();
assert_eq!(
(arr.clone().view_mut(),),
arr.multi_slice_mut((s![.., ..],)),
);
assert_eq!(arr.multi_slice_mut(()), ());
do_test!(&mut arr, s![0, ..]);
do_test!(&mut arr, s![0, ..], s![1, ..]);
do_test!(&mut arr, s![0, ..], s![-1, ..]);
do_test!(&mut arr, s![0, ..], s![1.., ..]);
do_test!(&mut arr, s![1, ..], s![..;2, ..]);
do_test!(&mut arr, s![..2, ..], s![2.., ..]);
do_test!(&mut arr, s![1..;2, ..], s![..;2, ..]);
do_test!(&mut arr, s![..;-2, ..], s![..;2, ..]);
do_test!(&mut arr, s![..;12, ..], s![3..;3, ..]);
do_test!(&mut arr, s![3, ..], s![..-1;-2, ..]);
do_test!(&mut arr, s![0, ..], s![1, ..], s![2, ..]);
do_test!(&mut arr, s![0, ..], s![1, ..], s![2, ..], s![3, ..]);
}
#[test]
fn test_multislice_intersecting() {
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![3, ..], s![3, ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![3, ..], s![3.., ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![3, ..], s![..;3, ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![..;6, ..], s![3..;3, ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![2, ..], s![..-1;-2, ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![4, ..], s![3, ..], s![3, ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![3, ..], s![4, ..], s![3, ..]));
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![3, ..], s![3, ..], s![4, ..]));<
5276
/div>
});
assert_panics!({
let mut arr = Array2::<u8>::zeros((8, 6));
arr.multi_slice_mut((s![3, ..], s![3, ..], s![4, ..], s![3, ..]));
});
}
#[should_panic]
#[test]
fn index_out_of_bounds() {
let mut a = Array::<i32, _>::zeros((3, 4));
a[[3, 2]] = 1;
}
#[should_panic]
#[test]
fn slice_oob() {
let a = ArcArray::<i32, _>::zeros((3, 4));
let _vi = a.slice(s![..10, ..]);
}
#[should_panic]
#[test]
fn slice_axis_oob() {
let a = ArcArray::<i32, _>::zeros((3, 4));
let _vi = a.slice_axis(Axis(0), Slice::new(0, Some(10), 1));
}
#[should_panic]
#[test]
fn slice_wrong_dim() {
let a = ArcArray::<i32, _>::zeros(vec![3, 4, 5]);
let _vi = a.slice(s![.., ..]);
}
#[test]
fn test_index() {
let mut A = ArcArray::<usize, _>::zeros((2, 3));
for (i, elt) in A.iter_mut().enumerate() {
*elt = i;
}
for ((i, j), a) in zip(indices((2, 3)), &A) {
assert_eq!(*a, A[[i, j]]);
}
let vi = A.slice(s![1.., ..;2]);
let mut it = vi.iter();
for ((i, j), x) in zip(indices((1, 2)), &mut it) {
assert_eq!(*x, vi[[i, j]]);
}
assert!(it.next().is_none());
}
#[test]
fn test_index_arrays() {
let a = Array1::from_iter(0..12);
assert_eq!(a[1], a[[1]]);
let v = a.view().into_shape((3, 4)).unwrap();
assert_eq!(a[1], v[[0, 1]]);
let w = v.into_shape((2, 2, 3)).unwrap();
assert_eq!(a[1], w[[0, 0, 1]]);
}
#[test]
#[allow(clippy::assign_op_pattern)]
fn test_add() {
let mut A = ArcArray::<usize, _>::zeros((2, 2));
for (i, elt) in A.iter_mut().enumerate() {
*elt = i;
}
let B = A.clone();
A = A + &B;
assert_eq!(A[[0, 0]], 0);
assert_eq!(A[[0, 1]], 2);
assert_eq!(A[[1, 0]], 4);
assert_eq!(A[[1, 1]], 6);
}
#[test]
fn test_multidim() {
let mut mat = ArcArray::zeros(2 * 3 * 4 * 5 * 6).reshape((2, 3, 4, 5, 6));
mat[(0, 0, 0, 0, 0)] = 22u8;
{
for (i, elt) in mat.iter_
B94A
mut().enumerate() {
*elt = i as u8;
}
}
assert_eq!(mat.shape(), &[2, 3, 4, 5, 6]);
}
/*
array([[[ 7, 6],
[ 5, 4],
[ 3, 2],
[ 1, 0]],
[[15, 14],
[13, 12],
[11, 10],
[ 9, 8]]])
*/
#[test]
fn test_negative_stride_arcarray() {
let mut mat = ArcArray::zeros((2, 4, 2));
mat[[0, 0, 0]] = 1.0f32;
for (i, elt) in mat.iter_mut().enumerate() {
*elt = i as f32;
}
{
let vi = mat.slice(s![.., ..;-1, ..;-1]);
assert_eq!(vi.shape(), &[2, 4, 2]);
// Test against sequential iterator
let seq = [
7f32, 6., 5., 4., 3., 2., 1., 0., 15., 14., 13., 12., 11., 10., 9., 8.,
];
for (a, b) in vi.iter().zip(seq.iter()) {
assert_eq!(*a, *b);
}
}
{
let vi = mat.slice(s![.., ..;-5, ..]);
let seq = [6., 7., 14., 15.];
for (a, b) in vi.iter().zip(seq.iter()) {
assert_eq!(*a, *b);
}
}
}
#[test]
fn test_cow() {
let mut mat = ArcArray::zeros((2, 2));
mat[[0, 0]] = 1;
let n = mat.clone();
mat[[0, 1]] = 2;
mat[[1, 0]] = 3;
mat[[1, 1]] = 4;
assert_eq!(mat[[0, 0]], 1);
assert_eq!(mat[[0, 1]], 2);
assert_eq!(n[[0, 0]], 1);
assert_eq!(n[[0, 1]], 0);
assert_eq!(n.get((0, 1)), Some(&0));
let mut rev = mat.reshape(4);
rev.slice_collapse(s![..;-1]);
assert_eq!(rev[0], 4);
assert_eq!(rev[1], 3);
assert_eq!(rev[2], 2);
assert_eq!(rev[3], 1);
let before = rev.clone();
// mutation
rev[0] = 5;
assert_eq!(rev[0], 5);
assert_eq!(rev[1], 3);
assert_eq!(rev[2], 2);
assert_eq!(rev[3], 1);
assert_eq!(before[0], 4);
assert_eq!(before[1], 3);
assert_eq!(before[2], 2);
assert_eq!(before[3], 1);
}
#[test]
fn test_cow_shrink() {
// A test for clone-on-write in the case that
// mutation shrinks the array and gives it different strides
//
let mut mat = ArcArray::zeros((2, 3));
//mat.slice_collapse(s![.., ..;2]);
mat[[0, 0]] = 1;
let n = mat.clone();
mat[[0, 1]] = 2;
mat[[0, 2]] = 3;
mat[[1, 0]] = 4;
mat[[1, 1]] = 5;
mat[[1, 2]] = 6;
assert_eq!(mat[[0, 0]], 1);
assert_eq!(mat[[0, 1]], 2);
assert_eq!(n[[0, 0]], 1);
assert_eq!(n[[0, 1]], 0);
assert_eq!(n.get((0, 1)), Some(&0));
// small has non-C strides this way
let mut small = mat.reshape(6);
small.slice_collapse(s![4..;-1]);
assert_eq!(small[0], 6);
assert_eq!(small[1], 5);
let before = small.clone();
// mutation
// small gets back C strides in CoW.
small[1] = 9;
assert_eq!(small[0], 6);
assert_eq!(small[1], 9);
assert_eq!(before[0], 6);
assert_eq!(before[1], 5);
}
#[test]
fn test_sub() {
let mat = ArcArray::linspace(0., 15., 16).reshape((2, 4, 2));
let s1 = mat.index_axis(Axis(0), 0);
let s2 = mat.index_axis(Axis(0), 1);
assert_eq!(s1.shape(), &[4, 2]);
assert_eq!(s2.shape(), &[4, 2]);
let n = ArcArray::linspace(8., 15., 8).reshape((4, 2));
assert_eq!(n, s2);
let m = ArcArray::from(vec![2., 3., 10., 11.]).reshape((2, 2));
assert_eq!(m, mat.index_axis(Axis(1), 1));
}
#[should_panic]
#[test]
fn test_sub_oob_1() {
let mat = ArcArray::linspace(0., 15., 16).reshape((2, 4, 2));
mat.index_axis(Axis(0), 2);
}
#[test]
#[cfg(feature = "approx")]
fn test_select() {
use approx::assert_abs_diff_eq;
// test for 2-d array
let x = arr2(&[
[0., 1.],
[1., 0.],
[1., 0.],
[1., 0.],
[1., 0.],
[0., 1.],
[0., 1.],
]);
let r = x.select(Axis(0), &[1, 3, 5]);
let c = x.select(Axis(1), &[1]);
let r_target = arr2(&[[1., 0.], [1., 0.], [0., 1.]]);
let c_target = arr2(&[[1., 0., 0., 0., 0., 1., 1.]]);
assert_abs_diff_eq!(r, r_target);
assert_abs_diff_eq!(c, c_target.t());
// test for 3-d array
let y = arr3(&[
[[1., 2., 3.], [1.5, 1.5, 3.]],
[[1., 2., 8.], [1., 2.5, 3.]],
]);
let r = y.select(Axis(1), &[1]);
let c = y.select(Axis(2), &[1]);
let r_target = arr3(&[[[1.5, 1.5, 3.]], [[1., 2.5, 3.]]]);
let c_target = arr3(&[[[2.], [1.5]], [[2.], [2.5]]]);
assert_abs_diff_eq!(r, r_target);
assert_abs_diff_eq!(c, c_target);
}
#[test]
fn diag() {
let d = arr2(&[[1., 2., 3.0f32]]).into_diag();
assert_eq!(d.dim(), 1);
let a = arr2(&[[1., 2., 3.0f32], [0., 0., 0.]]);
let d = a.view().into_diag();
assert_eq!(d.dim(), 2);
let d = arr2::<f32, _>(&[[]]).into_diag();
assert_eq!(d.dim(), 0);
let d = ArcArray::<f32, _>::zeros(()).into_diag();
assert_eq!(d.dim(), 1);
}
/// Check that the merged shape is correct.
///
/// Note that this does not check the strides in the "merged" case!
#[test]
#[allow(clippy::cognitive_complexity)]
fn merge_axes() {
macro_rules! assert_merged {
($arr:expr, $slice:expr, $take:expr, $into:expr) => {
let mut v = $arr.slice($slice);
let merged_len = v.len_of(Axis($take)) * v.len_of(Axis($into));
assert!(v.merge_ax
5276
es(Axis($take), Axis($into)));
assert_eq!(v.len_of(Axis($take)), if merged_len == 0 { 0 } else { 1 });
assert_eq!(v.len_of(Axis($into)), merged_len);
};
}
macro_rules! assert_not_merged {
($arr:expr, $slice:expr, $take:expr, $into:expr) => {
let mut v = $arr.slice($slice);
let old_dim = v.raw_dim();
let old_strides = v.strides().to_owned();
assert!(!v.merge_axes(Axis($take), Axis($into)));
assert_eq!(v.raw_dim(), old_dim);
assert_eq!(v.strides(), &old_strides[..]);
};
}
let a = Array4::<u8>::zeros((3, 4, 5, 4));
assert_not_merged!(a, s![.., .., .., ..], 0, 0);
assert_merged!(a, s![.., .., .., ..], 0, 1);
assert_not_merged!(a, s![.., .., .., ..], 0, 2);
assert_not_merged!(a, s![.., .., .., ..], 0, 3);
assert_not_merged!(a, s![.., .., .., ..], 1, 0);
assert_not_merged!(a, s![.., .., .., ..], 1, 1);
assert_merged!(a, s![.., .., .., ..], 1, 2);
assert_not_merged!(a, s![.., .., .., ..], 1, 3);
assert_not_merged!(a, s![.., .., .., ..], 2, 1);
assert_not_merged!(a, s![.., .., .., ..], 2, 2);
assert_merged!(a, s![.., .., .., ..], 2, 3);
assert_not_merged!(a, s![.., .., .., ..], 3, 0);
assert_not_merged!(a, s![.., .., .., ..], 3, 1);
assert_not_merged!(a, s![.., .., .., ..], 3, 2);
assert_not_merged!(a, s![.., .., .., ..], 3, 3);
assert_merged!(a, s![.., .., .., ..;2], 0, 1);
assert_not_merged!(a, s![.., .., .., ..;2], 1, 0);
assert_merged!(a, s![.., .., .., ..;2], 1, 2);
assert_not_merged!(a, s![.., .., .., ..;2], 2, 1);
assert_merged!(a, s![.., .., .., ..;2], 2, 3);
assert_not_merged!(a, s![.., .., .., ..;2], 3, 2);
assert_merged!(a, s![.., .., .., ..3], 0, 1);
assert_not_merged!(a, s![.., .., .., ..3], 1, 0);
assert_merged!(a, s![.., .., .., ..3], 1, 2);
assert_not_merged!(a, s![.., .., .., ..3], 2, 1);
assert_not_merged!(a, s![.., .., .., ..3], 2, 3);
assert_merged!(a, s![.., .., ..;2, ..], 0, 1);
assert_not_merged!(a, s![.., .., ..;2, ..], 1, 0);
assert_not_merged!(a, s![.., .., ..;2, ..], 1, 2);
assert_not_merged!(a, s![.., .., ..;2, ..], 2, 3);
assert_merged!(a, s![.., ..;2, .., ..], 0, 1);
assert_not_merged!(a, s![.., ..;2, .., ..], 1, 0);
assert_not_merged!(a, s![.., ..;2, .., ..], 1, 2);
assert_merged!(a, s![.., ..;2, .., ..], 2, 3);
assert_not_merged!(a, s![.., ..;2, .., ..], 3, 2);
let a = Array4::<u8>::zeros((3, 1, 5, 1).f());
assert_merged!(a, s![.., .., ..;2, ..], 0, 1);
assert_merged!(a, s![.., .., ..;2, ..], 0, 3);
assert_merged!(a, s![.., .., ..;2, ..], 1, 0);
assert_merged!(a, s![.., .., ..;2, ..], 1, 1);
assert_merged!(a, s![.., .., ..;2, ..], 1, 2);
assert_merged!(a, s![.., .., ..;2, ..], 1, 3);
assert_merged!(a, s![.., .., ..;2, ..], 2, 1);
assert_merged!(a, s![.., .., ..;2, ..], 2, 3);
assert_merged!(a, s![.., .., ..;2, ..], 3, 0);
assert_merged!(a, s![.., .., ..;2, ..], 3, 1);
assert_merged!(a, s![.., .., ..;2, ..], 3, 2);
assert_merged!(a, s![.., .., ..;2, ..], 3, 3);
let a = Array4::<u8>::zeros((3, 0, 5, 1));
assert_merged!(a, s![.., .., ..;2, ..], 0, 1);
assert_merged!(a, s![.., .., ..;2, ..], 1, 1);
assert_merged!(a, s![.., .., ..;2, ..], 2, 1);
assert_merged!(a, s![.., .., ..;2, ..], 3, 1);
assert_merged!(a, s![.., .., ..;2, ..], 1, 0);
assert_merged!(a, s![.., .., ..;2, ..], 1, 2);
assert_merg
85EA
ed!(a, s![.., .., ..;2, ..], 1, 3);
}
#[test]
fn swapaxes() {
let mut a = arr2(&[[1., 2.], [3., 4.0f32]]);
let b = arr2(&[[1., 3.], [2., 4.0f32]]);
assert!(a != b);
a.swap_axes(0, 1);
assert_eq!(a, b);
a.swap_axes(1, 1);
assert_eq!(a, b);
assert_eq!(a.as_slice_memory_order(), Some(&[1., 2., 3., 4.][..]));
assert_eq!(b.as_slice_memory_order(), Some(&[1., 3., 2., 4.][..]));
}
#[test]
fn permuted_axes() {
let a = array![1].index_axis_move(Axis(0), 0);
let permuted = a.view().permuted_axes([]);
assert_eq!(a, permuted);
let a = array![1];
let permuted = a.view().permuted_axes([0]);
assert_eq!(a, permuted);
let a = Array::from_iter(0..24).into_shape((2, 3, 4)).unwrap();
let permuted = a.view().permuted_axes([2, 1, 0]);
for ((i0, i1, i2), elem) in a.indexed_iter() {
assert_eq!(*elem, permuted[(i2, i1, i0)]);
}
let permuted = a.view().into_dyn().permuted_axes(&[0, 2, 1][..]);
for ((i0, i1, i2), elem) in a.indexed_iter() {
assert_eq!(*elem, permuted[&[i0, i2, i1][..]]);
}
let a = Array::from_iter(0..120).into_shape((2, 3, 4, 5)).unwrap();
let permuted = a.view().permuted_axes([1, 0, 3, 2]);
for ((i0, i1, i2, i3), elem) in a.indexed_iter() {
assert_eq!(*elem, permuted[(i1, i0, i3, i2)]);
}
let permuted = a.view().into_dyn().permuted_axes(&[1, 2, 3, 0][..]);
for ((i0, i1, i2, i3), elem) in a.indexed_iter() {
assert_eq!(*elem, permuted[&[i1, i2, i3, i0][..]]);
}
}
#[should_panic]
#[test]
fn permuted_axes_repeated_axis() {
let a = Array::from_iter(0..24).into_shape((2, 3, 4)).unwrap();
a.view().permuted_axes([1, 0, 1]);
}
#[should_panic]
#[test]
fn permuted_axes_missing_axis() {
let a = Array::from_iter(0..24)
.into_shape((2, 3, 4))
.unwrap()
.into_dyn();
a.view().permuted_axes(&[2, 0][..]);
}
#[should_panic]
#[test]
fn permuted_axes_oob() {
let a = Array::from_iter(0..24).into_shape((2, 3, 4)).unwrap();
a.view().permuted_axes([1, 0, 3]);
}
#[test]
fn standard_layout() {
let mut a = arr2(&[[1., 2.], [3., 4.0]]);
assert!(a.is_standard_layout());
a.swap_axes(0, 1);
assert!(!a.is_standard_layout());
a.swap_axes(0, 1);
assert!(a.is_standard_layout());
let x1 = a.index_axis(Axis(0), 0);
assert!(x1.is_standard_layout());
let x2 = a.index_axis(Axis(1), 0);
assert!(!x2.is_standard_layout());
let x3 = ArrayView1::from_shape(1.strides(2), &[1]).unwrap();
assert!(x3.is_standard_layout());
let x4 = ArrayView2::from_shape((0, 2).strides((0, 1)), &[1, 2]).unwrap();
assert!(x4.is_standard_layout());
}
#[test]
fn assign() {
let mut a = arr2(&[[1., 2.], [3., 4.]]);
let b = arr2(&[[1., 3.], [2., 4.]]);
a.assign(&b);
assert_eq!(a, b);
/* Test broadcasting */
a.assign(&ArcArray::zeros(1));
assert_eq!(a, ArcArray::zeros((2, 2)));
/* Test other type */
a.assign(&Array::from_elem((2, 2), 3.));
assert_eq!(a, ArcArray::from_elem((2, 2), 3.));
/* Test mut view */
let mut a = arr2(&[[1, 2], [3, 4]]);
{
let mut v = a.view_mut();
v.slice_collapse(s![..1, ..]);
v.fill(0);
}
assert_eq!(a, arr2(&[[0, 0], [3, 4]]));
}
#[test]
fn iter_size_hint() {
let mut a = arr2(&[[1., 2.], [3., 4.]]);
{
let mut it = a.iter();
assert_eq!(it.size_hint(), (4, Some(4)));
it.next();
assert_eq!(it.size_hint().0, 3);
it.next();
assert_eq!(it.size_hint().0, 2);
it.next();
assert_eq!(it.size_hint().0, 1);
it.next();
assert_eq!(it.size_hint().0, 0);
assert!(it.next().is_none());
assert_eq!(it.size_hint().0, 0);
}
a.swap_axes(0, 1);
{
let mut it = a.iter();
assert_eq!(it.size_hint(), (4, Some(4)));
it.next();
it.next();
assert_eq!(it.size_hint().0, 2);
it.next();
assert_eq!(it.size_hint().0, 1);
it.next();
assert_eq!(it.size_hint().0, 0);
assert!(it.next().is_none());
assert_eq!(it.size_hint().0, 0);
}
}
#[test]
fn zero_axes() {
let mut a = arr1::<f32>(&[]);
for _ in a.iter() {
panic!();
}
a.map(|_| panic!());
a.map_inplace(|_| panic!());
a.visit(|_| panic!());
println!("{:?}", a);
let b = arr2::<f32, _>(&[[], [], [], []]);
println!("{:?}\n{:?}", b.shape(), b);
// we can even get a subarray of b
let bsub = b.index_axis(Axis(0), 2);
assert_eq!(bsub.dim(), 0);
}
#[test]
fn equality() {
let a = arr2(&[[1., 2.], [3., 4.]]);
let mut b = arr2(&[[1., 2.], [2., 4.]]);
assert!(a != b);
b[(1, 0)] = 3.;
assert!(a == b);
// make sure we can compare different shapes without failure.
let c = arr2(&[[1., 2.]]);
assert!(a != c);
}
#[test]
fn map1() {
let a = arr2(&[[1., 2.], [3., 4.]]);
let b = a.map(|&x| (x / 3.) as isize);
assert_eq!(b, arr2(&[[0, 0], [1, 1]]));
// test map to reference with array's lifetime.
let c = a.map(|x| x);
assert_eq!(a[(0, 0)], *c[(0, 0)]);
}
#[test]
fn as_slice_memory_order() {
// test that mutation breaks sharing
let a = rcarr2(&[[1., 2.], [3., 4.0f32]]);
let mut b = a.clone();
for elt in b.as_slice_memory_order_mut().unwrap() {
*elt = 0.;
}
assert!(a != b, "{:?} != {:?}", a, b);
}
#[test]
fn array0_into_scalar() {
// With this kind of setup, the `Array`'s pointer is not the same as the
// underlying `Vec`'s pointer.
let a: Array0<i32> = array![4, 5, 6, 7].index_axis_move(Axis(0), 2);
assert_ne!(a.as_ptr(), a.into_raw_vec().as_ptr());
// `.into_scalar()` should still work correctly.
let a: Array0<i32> = array![4, 5, 6, 7].index_axis_move(Axis(0), 2);
assert_eq!(a.into_scalar(), 6);
// It should work for zero-size elements too.
let a: Array0<()> = array![(), (), (), ()].index_axis_move(Axis(0), 2);
assert_eq!(a.into_scalar(), ());
}
#[test]
fn array_view0_into_scalar() {
// With this kind of setup, the `Array`'s pointer is not the same as the
// underlying `Vec`'s pointer.
let a: Array0<i32> = array![4, 5, 6, 7].index_axis_move(Axis(0), 2);
assert_ne!(a.as_ptr(), a.into_raw_vec().as_ptr());
// `.into_scalar()` should still work correctly.
let a: Array0<i32> = array![4, 5, 6, 7].index_axis_move(Axis(0), 2);
assert_eq!(a.view().into_scalar(), &6);
// It should work for zero-size elements too.
let a: Array0<()> = array![(), (), (), ()].index_axis_move(Axis(0), 2);
assert_eq!(a.view().into_scalar(), &());
}
#[test]
fn array_view_mut0_into_scalar() {