754fca77e8
Removing the allocator<void> specialization for the versioned namespace breaks _Extptr_allocator<void> because the allocator<void> specialization was still declared in <bits/memoryfwd.h>, making it an incomplete type. It wrong to remove that specialization anyway, because it is still needed pre-C++20. This removes the #if ! _GLIBCXX_INLINE_VERSION check, so that allocator<void> is still explicitly specialized for the versioned namespace, consistent with the normal unversioned namespace mode. To make _Extptr_allocator<void> usable as a ProtoAllocator, this change adds a default constructor and converting constructor. That is consistent with std::allocator<void> since C++20 (and harmless to do for earlier standards). I'm also explicitly specializing allocator_traits<allocator<void>> so that it doesn't need to use allocator<void>::construct and destroy. Doing that allows those members to be removed, further simplifying allocator<void>. That new explicit specialization can delete the allocate, deallocate and max_size members, which are always ill-formed for allocator<void>. Signed-off-by: Jonathan Wakely <jwakely@redhat.com> libstdc++-v3/ChangeLog: * include/bits/alloc_traits.h (allocator_traits): Add explicit specialization for allocator<void>. Improve doxygen comments. * include/bits/allocator.h (allocator<void>): Restore for the versioned namespace. (allocator<void>::construct, allocator<void>::destroy): Remove. * include/ext/extptr_allocator.h (_Extptr_allocator<void>): Add default constructor and converting constructor. |
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README
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.