regression: `.value<size_t>` is compilation error.

[alex-700]

Description

While calling .value<size_t>, the code requests instantiation of json_pointer<size_t> which leads to compilation error, because of ambiguity between /=(string_t) and /=(size_t).

Reproduction steps

https://godbolt.org/z/WYKW7hYeY

Expected vs. actual results

Code must compiles, as in 3.10.5.

Minimal code example

#include <nlohmann/json.hpp>

int main() 
{
    nlohmann::json().value<size_t>("key", 0);
}

Error messages

No response

Compiler and operating system

archlinux, gcc-12.1

Library version

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.

[falbrechtskirchinger]

Confirmed. Compiles with v3.10.5, fails with develop.

[xvitaly]

Can confirm on Fedora 37 with 3.11.1.