Niels Lohmann f9d4b51455 Remove unused would_call_std_* from NLOHMANN_CAN_CALL_STD_FUNC_IMPL ...

Besides detail::result_of_begin/end, which is_range and iterator_t use,
the macro defined a namespace detail2 with a tag type, a catch-all
overload and would_call_std_begin/end, plus would_call_std_begin/end
structs directly in namespace nlohmann. Nothing has used them since
they were added in #3020.

Reduce the macro to its detail part. Without the trailing struct the
';' after the two invocations would be an empty declaration that
-Wextra-semi flags, so drop it. macro_scope.hpp included
meta/detected.hpp only for this macro; all users of detected.hpp
include it (or type_traits.hpp) themselves, so remove the include.

Behavior and ABI are unchanged. The undocumented, untested and unused
names nlohmann::would_call_std_begin, nlohmann::would_call_std_end and
namespace nlohmann::detail2 are no longer declared.

Part of #5708

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

2026-09-30 09:46:04 +02:00

..

begin.hpp

Remove unused would_call_std_* from NLOHMANN_CAN_CALL_STD_FUNC_IMPL

2026-09-30 09:46:04 +02:00

end.hpp

Remove unused would_call_std_* from NLOHMANN_CAN_CALL_STD_FUNC_IMPL

2026-09-30 09:46:04 +02:00