commit 91c26004037db689954318d3d1c801eea18d45f4
author Jonathan Wakely <jwakely@redhat.com> Tue Nov 30 13:41:32 2021 +0000
committer Jonathan Wakely <jwakely@redhat.com> Tue Nov 30 20:10:19 2021 +0000
tree a84b5f3533e958baabe1bc7ffb52ca36e706b544
parent cca6090b13ab503bef1cfa327e2d107789d6bd30

libstdc++: Skip tag dispatching for _S_relocate in C++17

In C++17 mode all callers of _S_relocate have already done:

  if constexpr (_S_use_relocate())

so we don't need to repeat that check and use tag dispatching to avoid
ill-formed instantiations.

libstdc++-v3/ChangeLog:

	* include/bits/stl_vector.h (vector::_S_do_relocate): Remove
	C++20 constexpr specifier.
	(vector::_S_relocate) [__cpp_if_constexpr]: Call __relocate_a
	directly without tag dispatching.