Fixed ModuleInfo generation to no longer use the ModuleInfo class' default initializer for types/defaults, it's unsafe as initializers don't necesarily match the "formal" type. There might be explicit padding. Changed -g switch to emit DW_LANG_D debug info, make demangling work with a patched GDB, still more work to do for full support of D's Dwarf extensions. Added getNullValue helper method.

module foreach2;
extern(C) int printf(char*, ...);
void main()
{
    static arr = [1.0, 2.0, 4.0, 8.0, 16.0];
    foreach(i,v; arr)
    {
        printf("arr[%d] = %f\n", i, v);
    }
    printf("-------------------------------\n");
    foreach_reverse(i,v; arr)
    {
        printf("arr[%d] = %f\n", i, v);
    }
}