mirror of https://github.com/rust-lang/rust.git
26 lines
786 B
Rust
26 lines
786 B
Rust
//@ run-pass
|
|
//
|
|
//@ compile-flags: -Ccodegen-units=1 -O
|
|
|
|
fn linidx(row: usize, col: usize) -> usize {
|
|
row * 1 + col * 3
|
|
}
|
|
|
|
fn main() {
|
|
let mut mat = [1.0f32, 5.0, 9.0, 2.0, 6.0, 10.0, 3.0, 7.0, 11.0, 4.0, 8.0, 12.0];
|
|
|
|
for i in 0..2 {
|
|
for j in i+1..3 {
|
|
if mat[linidx(j, 3)] > mat[linidx(i, 3)] {
|
|
for k in 0..4 {
|
|
let (x, rest) = mat.split_at_mut(linidx(i, k) + 1);
|
|
let a = x.last_mut().unwrap();
|
|
let b = rest.get_mut(linidx(j, k) - linidx(i, k) - 1).unwrap();
|
|
::std::mem::swap(a, b);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
assert_eq!([9.0, 5.0, 1.0, 10.0, 6.0, 2.0, 11.0, 7.0, 3.0, 12.0, 8.0, 4.0], mat);
|
|
}
|