Am 23.02.2019 um 20:19 schrieb Paul Backus:
On Friday, 22 February 2019 at 17:09:41 UTC, Sönke Ludwig wrote:
- Behaves like a POD if only POD fields exist, is non-copyable if any
contained type is non-copyable etc.
In fact, if a contained type is non-copyable, it fails to compile
altogether. (Example code below.)
Granted, so do Algebraic and SumType, so this isn't a knock against
taggedalgebraic in particular. But it does indicate poor test coverage
that you listed this feature without realizing it didn't work.
--- example.d
/+ dub.sdl:
dependency "taggedalgebraic" version="~>0.11.2"
+/
import taggedalgebraic;
struct NoCopy { @disable this(this); }
union U { NoCopy member; }
alias Test = TaggedUnion!U; // kaboom
void main() {}
You are right, I was actually aware of some places where the value is
not moved/swapped properly, but I forgot about it when rushing the post
before leaving. The test coverage is actually pretty good, though, even
if it is hard to give a meaningful number for template-heavy code like that.
