support enum

[likebeta]

construct enum type to basic_json (proxy by int type)

    enum { t = 0 };
    json  j = json::array();
    j.push_back(t);

    j.push_back(json::object({
         {"game_type", t}
    }));

[coveralls]

Coverage increased (+0.0%) to 99.55% when pulling 91aee10 on likebeta:master into 9f9d293 on nlohmann:master.

[nlohmann]

Thanks!

[nlohmann]

Unfortunately, I have to remove this fix, because the implicit assumption that anonymous enums are const int only works as long as basic_json::number_t is a different type (int64_t by default). If the type is changed to int32_t (as reported in issue #89), the conversion is ambiguous. Unless there is a better way, I decided to undo this change. The example code then would need an explicit cast:

enum { t = 0 };
json j = json::array();
j.push_back(static_cast<int>(t));

j.push_back(json::object(
{
    {"game_type", static_cast<int>(t)}
}));

I hope you don't mind this change - and if you have any ideas how to find a solution that is compatible to issue #89, please let me know!

[gregmarr]

You could probably use std::underlying_type<> to find the base type of the enum.

[nlohmann]

Good point!

[nlohmann]

Ok, I found another way :-)

[likebeta]

well done!， I am sorry to make this mistake.