In c++ 17, std::string_view can be converted to std::string implicitly which leads to a problem that in c++17 mode , a json object cannot be assigned to a string due to ambiguous assigning conversion path ( json --> string and json --> string_view --> string).
In gcc 7.1 such code produces a compilation error width -std=c++1z.
code:
#include "json.hpp"
#include <string>
int main()
{
nlohmann::json j;
j = "12345";
std::string s;
s = j;
return 0;
}
So, is it possible to remove the conversion to string specifically in c++17 mode to let the compiler select the json--> string_view --> string path ?
In c++ 17, std::string_view can be converted to std::string implicitly which leads to a problem that in c++17 mode , a json object cannot be assigned to a string due to ambiguous assigning conversion path ( json --> string and json --> string_view --> string).
In gcc 7.1 such code produces a compilation error width -std=c++1z.
code:
So, is it possible to remove the conversion to string specifically in c++17 mode to let the compiler select the json--> string_view --> string path ?