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Fix zero-sized tuples to emit a message

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Peter Dimov
2024-11-19 04:17:42 +02:00
parent b5694670b7
commit a2ed082046
1 changed files with 10 additions and 4 deletions
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14
include/boost/hash2/hash_append.hpp
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@@ -320,20 +320,26 @@ template<class Hash, class Flavor, class T>
// tuple-likes
template<class Hash, class Flavor, class T, std::size_t... J> BOOST_CXX14_CONSTEXPR void hash_append_tuple( Hash& h, Flavor const& f, T const& v, boost::mp11::integer_sequence<std::size_t, J...> )
template<class Hash, class Flavor, class T, std::size_t... J> BOOST_CXX14_CONSTEXPR void hash_append_tuple( Hash& h, Flavor const& f, T const& v, mp11::integer_sequence<std::size_t, J...> )
{
using std::get;
int a[] = { 0, ((void)hash2::hash_append( h, f, get<J>(v) ), 0)... };
int a[] = { ((void)hash2::hash_append( h, f, get<J>(v) ), 0)... };
(void)a;
}
template<class Hash, class Flavor, class T> BOOST_CXX14_CONSTEXPR void hash_append_tuple( Hash& h, Flavor const& f, T const& /*v*/, mp11::integer_sequence<std::size_t> )
{
// A hash_append call must always result in a call to Hash::update
hash2::hash_append( h, f, '\x00' );
}
template<class Hash, class Flavor, class T>
BOOST_CXX14_CONSTEXPR
typename std::enable_if< !container_hash::is_range<T>::value && container_hash::is_tuple_like<T>::value, void >::type
do_hash_append( Hash& h, Flavor const& f, T const& v )
{
typedef boost::mp11::make_index_sequence<std::tuple_size<T>::value> seq;
detail::hash_append_tuple( h, f, v, seq() );
using Seq = mp11::make_index_sequence<std::tuple_size<T>::value>;
detail::hash_append_tuple( h, f, v, Seq() );
}
// described classes