...It's but a convenient example to demonstrate the problem with D's `alias` anyway.

...import std.variant;

    private Variant[string] values;
    alias values this;

    @property
    {
      Variant opDispatch(string key...

...fine for structs:

```
struct MyInt {
    int x;
    alias x this;

    this(MyString s) {
        x = s...

...template Vec3(T) {
    alias Vec3 = Matrix!(T, 3, 1);

    template opResolveAlias(alias U)
    {
        static if...

...S, size_t M, size_t N)
{
}

alias Vec3(S) = Matrix!(S, 3, 1);
```

What...

...or other operators for a struct, just alias the value to `this` and use `std...

...it: for now, D allows writing template alias paramters, but AFAIK they will match absolutely...

My apologies, correction: `A` is a 'trivial alias'. Sorry for the minipost, but this topic...

BTW, you can also `alias this` your struct value and then use `std.conv : to...

...with concrete types.

Finally, in our example:

```
alias A(T) = B!T;
void foo(T...