Avoid conflict with std::apply (C++17)

[e4z9]

For example when calling the multiple cell version of lift the compiler tries to resolve the calls to apply(map(fa), bb) with std::apply(_Fn && __f, _Tuple && __t) and (understandably) fails to interpret sodium::cell as a tuple.

[e4z9]

Maybe someone with more C++ foo has an idea why that happens in the first place even when not using using namespace std;

[geniusisme]

This is ADL (argument-dependent lookup) at work. It sees that the argument sodium::cell<std::function<...>> is related to std and includes std functions in the lookup. Then, it depends on particularities of arguments if one of the functions is a better match or there is an ambiguity. Honestly, it is hard with templates everywhere to predict what would be the result of such a lookup.

Anyway, it seems I'm a little late to the party and the project is abandoned. Which is a shame, as it seems there is no replacement.