On 4/2/20 8:26 AM, Bastiaan Veelo wrote:
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");
```
Hm... I thought there was precedent for providing fallback
implementations for intrinsics. That is, you define the function, which
is only used if the intrinsic is not available.
I can't remember where I saw this. But you could try this by simply
implementing the bitops in core.bitop, and see if they are used outside
ctfe.
-Steve
