fn transpose_square_2()

in math/src/fft/concurrent.rs [200:212]

• 11 lines of code
• 3 McCabe index (conditional complexity)

fn transpose_square_2<T>(matrix: &mut [T], size: usize) {
    debug_assert_eq!(matrix.len(), 2 * size * size);

    // iterate over upper-left triangle, working in 1x2 blocks
    for row in 0..size {
        for col in (row..size).skip(1) {
            let i = (row * size + col) * 2;
            let j = (col * size + row) * 2;
            matrix.swap(i, j);
            matrix.swap(i + 1, j + 1);
        }
    }
}