Compile error in C++17

[njh0602]

if use command line option /std:c++latest (c++17) in Visual Studio 2017,
compile error occurred about std::unary_function.

so i just remove the code public std::unary_function < ... > and it works.
like this

namespace std {
    template<>
    class hash< sole::uuid >/* public unary_function< sole::uuid, size_t > */ {
    public:
        // hash functor: hash uuid to size_t value by pseudorandomizing transform
        size_t operator()( const sole::uuid &uuid ) const {
            if( sizeof(size_t) > 4 ) {
                return size_t( uuid.ab ^ uuid.cd );
            } else {
                uint64_t hash64 = uuid.ab ^ uuid.cd;
                return size_t( uint32_t( hash64 >> 32 ) ^ uint32_t( hash64 ) );
            }
        }
    };
}

is it right?

[Ybalrid]

This is funny, I just ran into the same exact issue minutes ago too. I've proposed the PR #21. I don't know if the original author of this library is still maintaining what's happening here. It seems this "archived" account is inactive, but they have a new account called @r-lyeh, but doesn't have a repository for this library.

[njh0602]

Nice timing! :) One more interesting thing is that using XCode's C ++ 17 compiler does not cause an error. So I could not find this error so far.

[Ybalrid]

This is because apple is shipping outdated standard library header with Xcode as far as I know (and it is sad.). This is part of the standard library, not the core language.

…

Le 18 nov. 2018 à 16:31, Jun Hyeon, Nam ***@***.***> a écrit : Nice timing! :) One more interesting thing is that using XCode's C ++ 17 compiler does not cause an error. So I could not find this error so far. — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

[Ybalrid]

Oh, the PR got accepted, you can probably close this issue

[r-lyeh]

FYI, I am monitoring this repo with the new account from now :)

[Ybalrid]

@r-lyeh Cool! Because this little library is genuinely useful. I needed to be sure to have unique identifiers for networked clients, and with this it's like, 4 lines of code to get a fairly strong -randomly wise- UUID.

Thanks for your work! 👌