I'm want to do something like this ```D part_int_t!(1,2,3) i;
auto x = -i[0]; --i[1]; // 1 i[1]++; // 2 ```I think the operator I need to overload would be opIndexUnary which I did.
(1) compiles.(2) doesn't - the compiler complains that i.opIndex isn't an lvalue and can't be modified. The language spec says that Post in- and decrement are rewritten but something's fishy.
What's going on behind the scene and how can I make it work?
