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

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