convert []u64 to []u8

[barren summit]

Given a slice of []u64 (of length 32), how can I convert it to a slice of []u8 of length 32 * 8. When I use asBytes, it just returns something of length 8 which is not what I want (probably the bytes of the pointer).

i basically want to just cast the pointer

and multiply the length by 8 since the elements are 8 times smaller

[quasi flame]

i have an idea let me just check if it actualy works

[normal copper]

you want sliceAsBytes, asBytes is for single items

[barren summit]

i mean i did this ```zig
const rs = result.mins[band * r .. (band + 1) * r];
print("{d}\n", .{rs.len});
var new_slice: []u8 = undefined;
new_slice.ptr = @ptrCast(rs.ptr);
new_slice.len = rs.len * 8; // * 8 because we are going from u64 -> u8
print("{d}\n", .{new_slice});

ahh

[normal copper]

also mlugg is working on implementing this in ptrCast so it'll just work soon probably

[quasi flame]

i was thinking on the lines of memcopy
allocate the u8 slice and memcopy the u64 slice into it

[wraith nest]

no need; as mentioned, this works:

const slice_of_u64: []const u64 = &[_]u64{ 0, 1, 2, 3, 4 };
const slice_of_u8 = std.mem.sliceAsBytes(slice_of_u64);