accept and parse function not work well with a pure number string

[WYHuestc]

When parse and accept a string, if the string is pure number string like "123"
accept will return true(it looks a error result)
parse will not throw a exception(I think it is wrong, It should throw a expection)
after parse we use this object to emplace it throw a expection json.exception.type_error.311

Example code:

using namespace nlohmann;
int main(){
    auto j = json::array();
    std::string my_input = "123456";
    if (json::accept(my_input)){
        std::cout << "it is a json" << std::endl;
    } else {
        std::cout << "it is not a json" << std::endl;
    }
    try
    {
        j = json::parse(my_input, nullptr, false);
        std::cout << "is_discarded: " << (j.is_discarded() ? "true" : "false") << std::endl;
        std::cout << "j.dump(): " << j.dump() << endl;
    }
    catch (json::exception& ex)
    {
        std::cout << "parse error reason: " << ex.what() << std::endl;
    }
    try {
        j.emplace("123","23");
    } catch (json::exception& ex) {
        std::cout << "emplace error reason: " << ex.what() << std::endl;
    }
    return 0;
}

The result output is :
it is a json
is_discarded: false
j.dump(): 123456
emplace error reason: [json.exception.type_error.311] cannot use emplace() with number

nlohmann::json version : 3.10.2
gcc version:
Apple clang version 13.0.0 (clang-1300.0.29.3)
Target: x86_64-apple-darwin20.6.0
Thread model: posix

[nlohmann]

This sounds reasonable:

• 123456 is valid JSON, therefore accept returns true.
• With j = json::parse(my_input, nullptr, false); you overwrite j which was an empty array, but is now a number.
• You then call emplace which only works with objects or null (see https://json.nlohmann.me/api/basic_json/emplace/ or https://json.nlohmann.me/home/exceptions/#jsonexceptiontype_error311)

[WYHuestc]

Thx for help