https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111550
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Patrick Palka <[email protected]>: https://gcc.gnu.org/g:5a2a527b26c22df4f1764f61b2285ac0c380ff68 commit r16-5918-g5a2a527b26c22df4f1764f61b2285ac0c380ff68 Author: Patrick Palka <[email protected]> Date: Fri Dec 5 12:16:30 2025 -0500 libstdc++: Use deducing this in range adaptors even in C++20 [PR111550] Use deducing this to implement perfect forwarding even in C++20 mode by using the _GLIBCXX_EXPLICIT_THIS_PARAMETER internal FTM instead of the standard __cpp_explicit_this_parameter. This fixes the original testcase from this PR even in C++20 mode. PR libstdc++/111550 libstdc++-v3/ChangeLog: * include/std/ranges (views::__adaptor::_Partial::operator()) [_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Also use deducing this in C++20 mode when possible. (views::__adaptor::_Pipe::Operator()) [_GLIBCXX_EXPLICIT_THIS_PARAMETER]: Likewise. * testsuite/std/ranges/adaptors/take.cc (test07): New test. Reviewed-by: Tomasz KamiÅski <[email protected]> Reviewed-by: Jonathan Wakely <[email protected]>
