On Friday, 15 July 2016 at 20:36:46 UTC, Stefan Koch wrote:

I decided to keep a gist updated to represent the current state the new engine can handle.
https://gist.github.com/UplinkCoder/89faa06311e417aa93ea99bc92934d3e

Internal changes to the bytecode engine make the manipulation of values on the ctfe stack possible.

this allows the following code to properly compile now.

struct V3 {int x; int y; int z;}
int fn() {

        auto b = V3(1,2,3);
        b.y += 19;
        return b.y;
}

static assert(fn() == 21);