Regression: no match for 'operator!=' comparing json_pointer and const char */string_t

[falbrechtskirchinger]

Description

Comparing a json_pointer and const char */const char[N]/json_pointer::string_t fails to compile.

v3.10.5 compiles.

Reproduction steps

See code example.

Expected vs. actual results

n/a

Minimal code example

#include <https://raw.githubusercontent.com/nlohmann/json/develop/single_include/nlohmann/json.hpp>
using nlohmann::json;

#include <iostream>

int main() {
    std::cout << std::boolalpha
              << (json::json_pointer{"/foo"} != "")
              << std::endl;
}

Error messages

No response

Compiler and operating system

any

Library version

develop (3.11.0, 3.11.1)

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.