Am Di., 14. Mai 2019 um 13:20 Uhr schrieb Jonathan Wakely <jwak...@redhat.com>:
>
>         * testsuite/20_util/allocator_traits/members/allocate_hint_nonpod.cc:
>         Use operator-> to access raw pointer member.
>         * testsuite/23_containers/vector/59829.cc: Likewise.
>         * testsuite/23_containers/vector/bool/80893.cc: Likewise.
>         * testsuite/libstdc++-prettyprinters/cxx11.cc: Use NullablePointer.
>         * testsuite/util/testsuite_allocator.h (NullablePointer): New utility
>         for tests.
>         (PointerBase, PointerBase_void): Derive from NullablePointer and use
>         its constructors and equality operators. Change converting
>         constructors to use operator-> to access private member of the other
>         pointer type.
>         (PointerBase_void::operator->()): Add, for access to private member.
>         (operator-(PointerBase, PointerBase)): Change to hidden friend.
>         (operator==(PointerBase, PointerBase)): Remove.
>         (operator!=(PointerBase, PointerBase)): Remove.
>
> There are probably more places in the testsuite that could use
> NullablePointer as a minimally-conforming type that meets the
> Cpp17NullablePointer requirements, instead of defining a new type each
> time one is needed.
>
> Tested powerpc64le-linux, committed to trunk.
>

In the primary template of NullablePointer we have:

explicit operator bool() const noexcept { return value == nullptr; }

This is incorrect according to the NullablePointer requirements, it needs to be:

explicit operator bool() const noexcept { return value != nullptr; }

- Daniel

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