Struct ctor called with cast

[ag0aep6g]

On 02/27/2018 09:59 PM, Radu wrote:
> On Tuesday, 27 February 2018 at 20:51:25 UTC, ag0aep6g wrote:
>> On 02/27/2018 09:30 PM, Radu wrote:
[...]
>>> enum Type { a };
>>> struct S(Type t = Type.a)
>>> {
>>>      this(Type)(Type t)
>>>      {
>>>          import std.stdio;
>>>          writeln("ctor called.");
>>>      }
>>> }
[...]
> So the bug is that somehow the templated version makes it so there is an 
> implicit void* ctor.

In your original code (quoted above), you've got a templated 
constructor. The `Type` in `this(Type)(Type t)` is not the enum. It's a 
template parameter of the constructor.

To get a non-templated constructor that takes a `Type` (the enum), you 
have to write:

----
this(Type t) /* NOTE: Only one set of parentheses. */
{
     /* ... */
}
----