CT BitArray

[Bastiaan Veelo]

On Thursday, 1 November 2018 at 08:50:38 UTC, Bastiaan Veelo 
wrote:
> On Thursday, 1 November 2018 at 00:01:04 UTC, Stefan Koch wrote:
>> On Wednesday, 31 October 2018 at 23:14:08 UTC, Bastiaan Veelo 
>> wrote:
>>> Currently, BitArray is not usable at compile time, so you 
>>> cannot do
>>> ```
>>> enum e = BitArray([1, 1, 1, 0]);
>>> ```
>>> This gives
>>>> /dlang/dmd/linux/bin64/../../src/phobos/std/bitmanip.d(1190): Error: `bts` cannot be interpreted at compile time, because it has no available source code

[....]

> meanwhile use module level BitArrays like
> ```
> immutable BitArray e;
> static this()
> {
>     e = BitArray([1, 1, 1, 0]);
> }
> ```

Note to self: when this occurs, the above error message does not 
offer a trace to the place where this originates. To get that, 
temporarily insert the following at the indicated line in 
bitmanip.d:
```
if(__ctfe) assert(false, "trap");
```

--Bastiaan.