[SUGGESTION] Add `#include <print>` in `cpp2util.h`

[leejy12]

As of Visual Studio 17.7, the <print> header is available (under /std:c++latest) so I think we should include it in cpputil.h w/ include guards. This simple patch should be enough:

// cpp2util.h around Line 150
#include <ostream>
+ #ifdef __cpp_lib_print
+     #include <print>
+ #endif
#include <queue>

Will your feature suggestion eliminate X% of security vulnerabilities of a given kind in current C++ code? N/A

Will your feature suggestion automate or eliminate X% of current C++ guidance literature? N/A

[JohelEGP]

More generally, you can search for "C++23" and "C++26" at https://en.cppreference.com/w/cpp/header to identify new headers.
You can then search the header at https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations to identify the corresponding feature-test macro.

[hsutter]

Thanks. Here's what I see, let me know if I missed any:

#ifdef __cpp_lib_expected
#include <expected>
#endif

#ifdef __cpp_lib_flat_map
#include <flat_map>
#endif

#ifdef __cpp_lib_flat_set
#include <flat_set>
#endif

#ifdef __cpp_lib_generator
#include <generator>
#endif

#ifdef __cpp_lib_print
#include <print>
#endif

#ifdef __cpp_lib_spanstream
#include <spanstream>
#endif

#ifdef __cpp_lib_stacktrace
#include <stacktrace>
#endif

#ifdef __cpp_lib_stdatomic_h
#include <stdatomic.h>
#endif

//  Not yet listed in SD-6 for feature test flags
//  md_span
//  stdfloat

[JohelEGP]

According to https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1467r9.html#core-test-macro,
there's no feature test macro for <stdfloat>,
so you'll have to use __has_include.

https://eel.is/c++draft/version.syn lists __cpp_lib_mdspan for <mdspan> (as does SD-6; there's no mp_span).

[hsutter]

D'oh, I put a _ in mdspan. My bad.

Thanks! Will fix both.