Re: Array of BitArrays definition compiles in DMD but not in GDC.

[John Colvin via Digitalmars-d-learn]

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gdc is a bit out of date at the moment.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.