Disappointing inflexibility of argument passing with "alias this"

[Adam D. Ruppe via Digitalmars-d]

On Monday, 22 February 2016 at 18:11:58 UTC, H. S. Teoh wrote:
> AFAICT, implicit ctors are not supported by design.

I agree with them that implicitly implicit ctors are a bad 
design, but explicitly implicit ctors I think are a different 
issue because then it is clear that the designer intended it and 
we can ask if it is sane to use or not.

Explicitly implicit ctors are like:

struct Foo {
    @implicit this(int a) {}
}

since it has the attribute, the compiler will allow it to be used 
when calling a function that expects a Foo using an int (unless 
some other thing matches better).

Calling that explicitly is already allowed:

Foo a = 1; // works with that now