On Tuesday, 6 March 2018 at 10:37:30 UTC, Pierre wrote:
Hi all,
I would like to use bt function (core.bitop) on generic array
but it seems that's not possible. I would like to know if there
is some reasons to have a fixed type (size_t) instead of
something like :
pure @system int bt(T)(in T* p,size_t bitnum)
if(__traits(isIntegral,T))
{
return p[bitnum/ (T.sizeof*8)] & (1 << (bitnum&
((T.sizeof*8) - 1)));
}
Thank you for your help.
From this point of view, size_t is not fixed, but capable to
point to any place in memory.
Therefore, pointer of any type have by definition exactly the
defined size of size_t.
If you want to use an array (or an object of custom type) as a
bit array, there is for example
https://dlang.org/library/std/bitmanip/bit_array.html
which fits more, I think...
