...issues/show_bug.cgi?id=2928

           Summary: Swap order of paramaters for std.range's...

...your previous proposal of scope constraints:

void swap(scope ref int* a, scope ref int...

...you'd get something alike:

	swap(b,c); // Error, 'swap' wants c (shared Object c...

...Object c;
swap(a,b);   // Okay
swap(b,c);   // Error, template instantiation swap(local object...

...adding scope constrains back then. To implement swap safely, you need to know that the...

...to swap two objects of an arbitrary non-const type, I was trying to swap...

...a limitation. If someone can't call swap(n.a, n.b) for an arbitrary...

...few exceptions, see scope rule 6) to swap them. However, assigning to anywhere off the...

...n = n.next;
       auto n2 = n;
       swap(n, n2);
       swap(n, n.next); // Error: Cannot...

...n = n.next;
       auto n2 = n;
       swap(n, n2);
       swap(n, n.next); // Error: Cannot...