Rust slice helpers

Slices.rs

//since memory is aligned contiguously we can use the values() function as-is
#[repr(C)]
#[derive(Copy, Clone, PartialEq)]
pub struct Point {
    pub x:f64,
    pub y:f64,
    pub z:f64
}

impl SliceValues for Point {}

pub trait SliceValues {
    fn values(self:&Self) -> &[f64] {
        let pointer = self as *const Self as *const f64;
        let slice: &[f64] = unsafe { std::slice::from_raw_parts(pointer, 4) };
        slice
    }
}

//not really related to the above, but handy
pub fn copy_slices_to_slice<T>(srcs:&[Vec<T>], dest:&mut [T]) 
where T: Copy
{
    let mut offset = 0;
    for src in srcs.iter() {
        let len = src.len();
        let max = offset + len;
        dest[offset..max].copy_from_slice(&src);
        offset = max;
    }
}