Skip to content

nlohmann::json_pointer::operator string_t

operator string_t() const

Return a string representation of the JSON pointer.

Return value

A string representation of the JSON pointer

Possible implementation

operator string_t() const
    return to_string();



This function is deprecated in favor of to_string and will be removed in a future major version release.



The example shows how JSON Pointers can be implicitly converted to strings.

#include <iostream>
#include <nlohmann/json.hpp>

using json = nlohmann::json;

int main()
    // different JSON Pointers
    json::json_pointer ptr1("/foo/0");
    json::json_pointer ptr2("/a~1b");

    // implicit conversion to string
    std::string s;
    s += ptr1;
    s += "\n";
    s += ptr2;

    std::cout << s << std::endl;



Version history

  • Since version 2.0.0.
  • Changed type to string_t and deprecated in version 3.11.0.

Last update: July 28, 2022