On Tuesday, 3 September 2013 at 20:07:57 UTC, Walter Bright wrote:
If you need a zero sized object in D,
alias whatever[0] zeroSizeObject;
I tried that, but unfortunately std.variant isn't compatible with
zero sized types:
```
import std.variant;
import std.stdio;
import std.typecons;
void main() {
// This would be preferable, but Algebraic doens't like zero
sized types
//alias FirstType = void[0];
//alias SecondType = void[0];
// phobos\std\variant.d(165): Error: static assert (0u >= 4u)
is false
// phobos\std\variant.d(1149): instantiated from here:
VariantN!(0u, void[0u], void[0u])
// Typedef!() wraps void[0] in a struct, which still has a size,
and therefore
// memory overhead, so we're back to square one.
alias FirstType = Typedef!(void[0]);
alias SecondType = Typedef!(void[0]);
pragma(msg, FirstType.sizeof); // 1UL, darn
alias Variants = Algebraic!(FirstType, SecondType);
}
```
