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From: "de34 at live dot cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114078] New: operator new and operator delete are
 incorrectly acceptable as explicit object member functions
Date: Fri, 23 Feb 2024 13:57:58 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: accepts-invalid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: de34 at live dot cn
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114078

            Bug ID: 114078
           Summary: operator new and operator delete are incorrectly
                    acceptable as explicit object member functions
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: de34 at live dot cn
  Target Milestone: ---

GCC currently accepts this wrong program while it shouldn't
(https://godbolt.org/z/7jGnGqYPM), because member operator new/operator del=
ete
are always static member functions.

#include <cstddef>
#include <new>

struct S {
    void* operator new(this std::size_t);
    void operator delete(this S*, std::destroying_delete_t);

    operator S*() const;
    operator std::size_t() const;
};

int main()
{
    S{}.operator new();
    S{}.operator delete(std::destroying_delete);
}

Similar to https://github.com/llvm/llvm-project/issues/82249 which is fixed
recently.=