Mac build fails, PC build OK

C4DS

I have converted an R16-R19 plugin to R20 on PC.
After resolving all compiler issues. I copy the adjusted source files, res files to Mac.
There the build reports

No viable conversion from 'maxon::Bool' (aka 'bool') to 'Result<void>'

and this for line 2286 in apibase.h

Result<void> res = dst.CopyFrom(src);

It seems related to a class I provided, disallowing copy and assign. And for which I have provided a CopyFrom method.
Strangly enough, I have provided

class MyObject
{
MAXON_DISALLOW_COPY_AND_ASSIGN(MyObject);

public:
...
maxon::Bool CopyFrom(const MyObject& src);

A return type of maxon::Bool, which is also mentioned in the Code Style Guide point 9.6.

while the R19 documentation indicates

MAXON_WARN_UNUSED Result<void> CopyFrom(const Example1& src)

Looking at my code, it seems I got it wrong.
The R16-R19 implementation uses a Bool as return type, while it should be a Result<void>, still all compiles fine, and runs fine as well. (both PC and Mac)
The R20 implementation uses a Bool, which should be OK according to the documentation, compiles fine on PC but that fails to compile on Mac.

EDIT:
The R20 SDK example (Move/Copy Constructors) also contains:

maxon::Result<void> CopyFrom(const Example3& src)

I am confused

C4DS

Think I got it resolved.
Seems the correct implementation should indeed be

maxon::Result<void> CopyFrom(const Example3& src)

as the arraytutorial.cpp and movecopyconstructor.cpp examples from the R20 SDK indicate.

Please update the Code Style Guide point 9.6 to show the correct way to go for a CopyFrom.
Thanks for watching.

C4DS

I had a "deja vu" moment, and indeed ... seems I already once hit that same wall here

Funny that Visual Studio never once complained about the maxon::Bool CopyFrom.