On Friday, 7 September 2018 at 17:01:09 UTC, Meta wrote:
Semi-unrelated, but I think you should open a bug for this one.
I remember Andrei stating before that every function in
std.algorithm except for LevehnsteinDistance(?) is @nogc, so he
either missed topNCopy or the gc-ness of the function has
changed sometime between ~2015 and now.
It was never true. Here is another example:
import std.algorithm;
void main() @nogc
{
int[4] a, b;
fill(a[], b[]);
}
The funny thing is that fill() doesn't always allocate, but only
if the element to fill with, is an array. fill() uses enforce()
which allocates and throws. Other algorithms (e.g. equal) have
special handling for character arrays and throw if they get wrong
unicode or use some auto-decoding functions that aren't @nogc.
