https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119744
--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Nathan Myers <n...@gcc.gnu.org>: https://gcc.gnu.org/g:a77146f01563b5df19e70061dc237178b5532aa9 commit r16-3997-ga77146f01563b5df19e70061dc237178b5532aa9 Author: Nathan Myers <n...@cantrip.org> Date: Thu Jul 3 17:15:40 2025 -0400 libstdc++: Add NTTP bind_front, -back, not_fn (P2714) [PR119744] Add non-type template parameter function-object/-pointer argument versions of bind_front, bind_back, and not_fn. This introduces a new internal type _Bind_fn_t to carry the template-argument function object when no arguments are bound, used in both bind_front and bind_back. Otherwise they return a lambda object that has captured the arguments. There is no need to change libstdc++-v3/src/c++23/std.cc.in because existing exports: "using std::bind_front;" etc. export the new overloads. libstdc++-v3/ChangeLog: PR libstdc++/119744 * include/bits/version.def: Redefine __cpp_lib_bind_front etc. * include/bits/version.h: Ditto. * include/std/functional: Add new bind_front etc. overloads * testsuite/20_util/function_objects/bind_back/1.cc: Check plumbing better * testsuite/20_util/function_objects/bind_back/nttp.cc: New test. * testsuite/20_util/function_objects/bind_back/nttp_neg.cc: New test. * testsuite/20_util/function_objects/bind_front/1.cc: Check plumbing better * testsuite/20_util/function_objects/bind_front/nttp.cc: New test. * testsuite/20_util/function_objects/bind_front/nttp_neg.cc: New test. * testsuite/20_util/function_objects/not_fn/nttp.cc: New test. * testsuite/20_util/function_objects/not_fn/nttp_neg.cc: New test. * testsuite/20_util/headers/functional/synopsis.cc: New decls.
