no-arg constructor for structs (again)

[Felix Hufnagel]

On Thursday, 20 September 2012 at 00:14:04 UTC, Jonathan M Davis
wrote:
> On Thursday, September 20, 2012 00:12:04 Felix Hufnagel wrote:
>> isn't it even worse?
>> 
>> import std.stdio;
>> struct S
>> {
>> int i;
>> this(void* p = null){this.i = 5;}
>> }
>> void main()
>> {
>> //S l(); //gives a linker error
>> auto k = S();
>> writeln(k.i); //prints 0
>> }
>
> Of course that generates a linker error. You just declared a 
> function without
> a body.
>
> - Jonathan M Davis

sure, but it's a bit unexpected. do we need to be able to declare
empty functions?

but whats even more confusing: you are not allowed to declare an
no_arg constructor. but you are allowed to declare one where all
parameters have default parameters. but then, how to call it
without args? auto k = S(); doesn't work?