Forwarding Uncopyable Static Array Elements
Nordlöw
per.nordlow at gmail.com
Sun Sep 17 14:42:07 UTC 2017
On Sunday, 17 September 2017 at 13:00:04 UTC, Nordlöw wrote:
> How can
>
> T[n] asStatic(T, size_t n)(T[n] arr)
> {
> import std.traits : isCopyable;
> static if (isCopyable!T)
> {
> return arr;
> }
> else
> {
> static assert(false, "TODO support forwarding of
> uncopyable elements");
> }
> }
>
> be extended to support uncopyable element types?
This works for me
T[n] asStatic(T, size_t n)(T[n] x)
{
import std.traits : isCopyable;
static if (isCopyable!T)
{
return x;
}
else
{
T[n] y = void;
// TODO why doesn't this work here?
// import std.algorithm.mutation : moveEmplaceAll;
// moveEmplaceAll(x[], y[]);
foreach (const ix, ref value; x)
{
import std.algorithm.mutation : move;
move(value, y[ix]);
}
return y;
}
}
Why does `moveEmplaceAll` error here?
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