json_pointer - a code example from doc's does not compile #4453

#include <string>
#include "json.hpp"

using json = nlohmann::json;

int main()
{
    std::string ptrStr = "/nested";
    ptrStr += "/one";

    json::json_pointer ptr1 = "/nested/one";
    auto               ptr2 = "/nested/one"_json_pointer;
    json::json_pointer ptr3 = ptrStr;
}

GNU:
main.cpp: In function ‘int main()’:
main.cpp:11:31: error: conversion from ‘const char [12]’ to non-scalar type ‘nlohmann::json_abi_v3_11_3::basic_json<>::json_pointer’ {aka ‘nlohmann::json_abi_v3_11_3::json_pointer<std::__cxx11::basic_string<char> >’} requested
   11 |     json::json_pointer ptr1 = "/nested/one";
      |                               ^~~~~~~~~~~~~
main.cpp:13:31: error: conversion from ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} to non-scalar type ‘nlohmann::json_abi_v3_11_3::basic_json<>::json_pointer’ {aka ‘nlohmann::json_abi_v3_11_3::json_pointer<std::__cxx11::basic_string<char> >’} requested
   13 |     json::json_pointer ptr3 = ptrStr;
      |                               ^~~~~~


Clang:
main.cpp:11:24: error: no viable conversion from 'const char[12]' to 'json::json_pointer' (aka 'json_pointer<std::basic_string<char>>')
    json::json_pointer ptr1 = "/nested/one";
                       ^      ~~~~~~~~~~~~~
./json.hpp:13841:7: note: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'const char[12]' to 'const nlohmann::json_pointer<std::basic_string<char>> &' for 1st argument
class json_pointer
      ^
./json.hpp:13841:7: note: candidate constructor (the implicit move constructor) not viable: no known conversion from 'const char[12]' to 'nlohmann::json_pointer<std::basic_string<char>> &&' for 1st argument
./json.hpp:13868:14: note: explicit constructor is not a candidate
    explicit json_pointer(const string_t& s = "")
             ^
main.cpp:13:24: error: no viable conversion from 'std::string' (aka 'basic_string<char>') to 'json::json_pointer' (aka 'json_pointer<std::basic_string<char>>')
    json::json_pointer ptr3 = ptrStr;
                       ^      ~~~~~~
./json.hpp:13841:7: note: candidate constructor (the implicit copy constructor) not viable: no known conversion from 'std::string' (aka 'basic_string<char>') to 'const nlohmann::json_pointer<std::basic_string<char>> &' for 1st argument
class json_pointer
      ^
./json.hpp:13841:7: note: candidate constructor (the implicit move constructor) not viable: no known conversion from 'std::string' (aka 'basic_string<char>') to 'nlohmann::json_pointer<std::basic_string<char>> &&' for 1st argument
./json.hpp:13868:14: note: explicit constructor is not a candidate
    explicit json_pointer(const string_t& s = "")
             ^
2 errors generated.