https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85671
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Wed Jul 4 11:44:56 2018 New Revision: 262388 URL: https://gcc.gnu.org/viewcvs?rev=262388&root=gcc&view=rev Log: PR libstdc++/85671 allow copy elision in path concatenation By performing the /= operation on a named local variable instead of a temporary the copy made for the return value can be elided. Backport from mainline 2018-05-07 Jonathan Wakely <jwak...@redhat.com> PR libstdc++/85671 * include/bits/fs_path.h (operator/): Permit copy elision. * include/experimental/bits/fs_path.h (operator/): Likewise. Modified: branches/gcc-8-branch/libstdc++-v3/ChangeLog branches/gcc-8-branch/libstdc++-v3/include/bits/fs_path.h branches/gcc-8-branch/libstdc++-v3/include/experimental/bits/fs_path.h
