Mac build fails, PC build OK



  • 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



  • 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.



  • 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.