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Tested on Linux-x64. 2016-11-13 Ville Voutilainen <ville.voutilainen@gmail.com> Implement P0513R0, Poisoning the Hash. * include/bits/functional_hash.h (__poison_hash): New. * include/bits/unique_ptr.h (hash<unique_ptr<_Tp, _Dp>>): Derive from __poison_hash. * include/std/optional (hash<optional<_Tp>>): Likewise. * include/std/variant (hash<variant<_Types...>>): Likewise. * testsuite/20_util/optional/hash.cc: New. * testsuite/20_util/unique_ptr/hash/1.cc: Add tests for poisoned fancy pointer hashes. * testsuite/20_util/variant/hash.cc: New.
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