[Bug libstdc++/112318] New: Deprecated move ctor does not trigger -Wdeprecated-declarations when creating a std::optional

["enolan at alumni dot cmu.edu" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112318

            Bug ID: 112318
           Summary: Deprecated move ctor does not trigger
                    -Wdeprecated-declarations when creating a
                    std::optional
           Product: gcc
           Version: 13.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: enolan at alumni dot cmu.edu
  Target Milestone: ---

When constructing a std::optional value for a type whose move ctor is marked
deprecated that invokes its move ctor, -Wdeprecated-declarations is not
triggered.

Compiler explorer link: https://godbolt.org/z/EPveeoEfn

Minimal reproduction:

#include <optional>

struct foo {
    foo() {}
    [[deprecated]] foo(foo&&);
};

void bar() {
    std::optional<foo> quux{foo{}};
}

> the exact version of gcc

g++ (GCC) 13.2.1 20231011 (Red Hat 13.2.1-4)

> the system type

Fedora release 38 (Thirty Eight)

> the options given when GCC was configured/built

Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,m2,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --enable-libstdcxx-backtrace
--with-libstdcxx-zoneinfo=/usr/share/zoneinfo --with-linker-hash-style=gnu
--enable-plugin --enable-initfini-array
--with-isl=/builddir/build/BUILD/gcc-13.2.1-20231011/obj-x86_64-redhat-linux/isl-install
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-offload-defaulted --enable-gnu-indirect-function --enable-cet
--with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
--with-build-config=bootstrap-lto --enable-link-serialization=1

> the complete command line that triggers the bug

g++ -c -Werror=deprecated-declarations poc.cpp

> the compiler output