On Friday, 1 October 2021 at 14:26:39 UTC, jfondren wrote:
On Friday, 1 October 2021 at 14:03:06 UTC, Stephen wrote:
This code should work should mutual recursion be supported.
It still wouldn't work, because structs are value types and
it's impossible to say how large either struct is:
Error: struct `mutualrec.Ar` no size because of forward
reference
With s/struct/class/ it still wouldn't work because this is a
mixin problem rather than a problem of template mutual
recursion:
```d
mixin(q{ class Ar { Br b; } });
mixin(q{ class Br { Ar b; } });
```
mutualrec2.d-mixin-1(1): Error: undefined identifier `Br`, did
you mean class `Ar`?
This seems like a surprising limitation of mixin, though, which
isn't highlighted by the spec.
All right I'll try to design without mutual recursion but mixins
don't seem to work if they're put out of order.
(i.e. this works:
```d
struct Ar { Br b; ubyte a; }
struct Br { ubyte b; }
```
but not this:
```d
mixin(q{struct Ar { Br b; ubyte a; }});
mixin(q{struct Br { ubyte b; }});
```
).
Is this by design?
