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digitalmars.D.learn - Forwarding Uncopyable Static Array Elements

reply =?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:
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?
Sep 17
next sibling parent =?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:
On Sunday, 17 September 2017 at 13:00:04 UTC, Nordlöw wrote:
 How can

 ...

 be extended to support uncopyable element types?
That is, when `T` is uncopyable.
Sep 17
prev sibling parent =?UTF-8?B?Tm9yZGzDtnc=?= <per.nordlow gmail.com> writes:
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?
Sep 17