In my code I'm passing an array of BitArrays to a constructor like this (though mostly as a placeholder):

  Terrain t = new Terrain(1, 15, [
    BitArray([1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]),
    BitArray([1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
    BitArray([0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
    BitArray([0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
    BitArray([0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
    BitArray([1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1]),
  ]);

The code compiles fine when using DMD 2.068.1 but GDC 5.2.1, I get this error for every line:

error: cannot implicityly convert expression ([stuff]) of type int[] to ulong

Why does this compiler difference exist and how do I get around it? Thanks!

On Thursday, 8 October 2015 at 21:40:02 UTC, TheGag96 wrote:
> In my code I'm passing an array of BitArrays to a constructor like this (though mostly as a placeholder):
>
>   Terrain t = new Terrain(1, 15, [
>     BitArray([1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]),
>     BitArray([1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
>     BitArray([0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
>     BitArray([0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
>     BitArray([0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1]),
>     BitArray([1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1]),
>   ]);
>
> The code compiles fine when using DMD 2.068.1 but GDC 5.2.1, I get this error for every line:
>
> error: cannot implicityly convert expression ([stuff]) of type int[] to ulong
>
> Why does this compiler difference exist and how do I get around it? Thanks!

gdc is a bit out of date at the moment. If you do something like this:

auto bitArray(bool[] ba) pure nothrow
{
    BitArray tmp;
    tmp.init(ba);
    return tmp;
}

auto bitArray(void[] v, size_t numbits) pure nothrow
{
    BitArray tmp;
    tmp.init(v, numbits);
    return tmp;
}

then replace all your calls to the constructor BitArray with bitArray, things should work OK for you.

On Friday, 9 October 2015 at 07:08:15 UTC, John Colvin wrote:
> On Thursday, 8 October 2015 at 21:40:02 UTC, TheGag96 wrote:
>> [...]
>
> gdc is a bit out of date at the moment. If you do something like this:
>
> auto bitArray(bool[] ba) pure nothrow
> {
>     BitArray tmp;
>     tmp.init(ba);
>     return tmp;
> }
>
> auto bitArray(void[] v, size_t numbits) pure nothrow
> {
>     BitArray tmp;
>     tmp.init(v, numbits);
>     return tmp;
> }
>
> then replace all your calls to the constructor BitArray with bitArray, things should work OK for you.

That appears to work, although the compiler was complaining that the calls to init were not pure nor nothrow. Thanks! Hopefully they'll update GDC soon.