Construct bitset from string_view

[asolwa]

Hi,

It appears a bug has crept into the construction of the bitset. The set function is used, but it does not accept std::optional. The result of the 'enum_cast' function should be dereferenced before being passed to the set method.

magic_enum/include/magic_enum/magic_enum_containers.hpp

Line 624 in 664ee62

 set(v); 

Fixed in:
#367

[Daniil Goncharov]

Thanks for fix!