On Monday, 8 January 2018 at 23:31:27 UTC, Jonathan M Davis wrote:
auto foo(T)(auto ref T t)
{
return t;
}
foo(42);
will result in foo being instantiated as
int foo(int t)
{
return t;
}
whereas
int i;
foo(i);
will result in foo being instantiated as
int foo(ref int t)
{
return t;
}
So, by using auto ref, a function can accept both lvalues and
rvalues. And in D, rvalues get moved, not copied.
What does it mean to "move" a variable/value instead of copying
it?
Was "auto ref" created for anything besides structs?
