• "Malte Skarupke" <malteskarupke web.de> Oct 31 2012
• "bearophile" <bearophileHUGS lycos.com> Oct 31 2012

"Malte Skarupke" <malteskarupke web.de> writes:

I want to get this to compile:

void main()
{
     struct A
     {
         this(int x) { this.x = x; }
         int x;
     }
     const(A) a = A(5);
     A b = a;
}

It should clearly be legal to create a non-const copy of the 
struct. What am I missing in order to do this?

Cheers,

Malte

"bearophile" <bearophileHUGS lycos.com> writes:

Malte Skarupke:

 What am I missing in order to do this?


In D when you define a struct inside a function, it's not a POD 
any more.

If you define it as "static struct A" instead of "struct A", your 
code will compile.

Unfortunately DMD gives a too much generic error message in this 
case, it doesn't explain what's the problem:

test.d(7): Error: cannot implicitly convert expression (a) of 
type const(A) to A

Bye,
bearophile