It seems one cannot std.algorithm.mutation.move objects
explicitly. Say I have a non-copyable type
struct NoCopy
{
int payload; // some payload
pure nothrow @nogc @safe @disable:
this(this); // make it non copyable
}
that is being used in a compile-time function evaluation where
values are being moved.
int f() pure nothrow @nogc @safe
{
import std.algorithm.mutation : move;
NoCopy nc = NoCopy(1), nc2 = NoCopy(3);
nc = move(nc2);
return 0;
}
static assert(f() == 0); // trigger CTFE
It fails because move() cannot be executed at compile time. The
reason
"memcpy cannot be interpreted at compile time, because it has
no available source code"
sounds very suspicious. Shouldn't it be possible to move at CTFE,
too, or does it mean, non-copyable types are practically unusable
for CTFE?
