* testsuite/23_containers/unordered_multiset/modifiers/insert_range.cc:
New test.
* testsuite/23_containers/unordered_set/cons/from_range.cc: New test.
* testsuite/23_containers/unordered_set/modifiers/insert_range.cc: New
test.
---
Tested on x86_64-linux (all-test) and unordered_(multi)_set without PCH.
OK for trunk?
libstdc++-v3/include/bits/hashtable.h | 43 ++--
libstdc++-v3/include/bits/unordered_set.h | 199 +++++++++++++++++
.../unordered_multiset/cons/from_range.cc | 201 ++++++++++++++++++
.../modifiers/insert_range.cc | 62 ++++++
.../unordered_set/cons/from_range.cc | 201 ++++++++++++++++++
.../unordered_set/modifiers/insert_range.cc | 65 ++++++
6 files changed, 755 insertions(+), 16 deletions(-)
create mode 100644
libstdc++-v3/testsuite/23_containers/unordered_multiset/cons/from_range.cc
create mode 100644
libstdc++-v3/testsuite/23_containers/unordered_multiset/modifiers/insert_range.cc
create mode 100644
libstdc++-v3/testsuite/23_containers/unordered_set/cons/from_range.cc
create mode 100644
libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert_range.cc
diff --git a/libstdc++-v3/include/bits/hashtable.h
b/libstdc++-v3/include/bits/hashtable.h
index 246e62afc6a..20f9bd98d5b 100644
--- a/libstdc++-v3/include/bits/hashtable.h
+++ b/libstdc++-v3/include/bits/hashtable.h
@@ -798,6 +798,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_M_equal_range_tr(const _Kt& __k) const;
#endif // __glibcxx_generic_unordered_lookup
+ void _M_rehash_insert(size_type __n);
+
private:
// Bucket index computation helpers.
size_type
@@ -2388,6 +2390,30 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
return __pos;
}
+ template<typename _Key, typename _Value, typename _Alloc,
+ typename _ExtractKey, typename _Equal,
+ typename _Hash, typename _RangeHash, typename _Unused,
+ typename _RehashPolicy, typename _Traits>
+ void
+ _Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal,
+ _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::
+ _M_rehash_insert(size_type __n)
+ {
+ using __pair_type = std::pair<bool, std::size_t>;
+ if (__n == 0)
+ return;
+
+ __rehash_guard_t __rehash_guard(_M_rehash_policy);
+ __pair_type __do_rehash
+ = _M_rehash_policy._M_need_rehash(_M_bucket_count, _M_element_count,
__n);
+
+ if (__do_rehash.first)
+ _M_rehash(__do_rehash.second, false_type{});
+
+ __rehash_guard._M_guarded_obj = nullptr;
+ }
+
+
template<typename _Key, typename _Value, typename _Alloc,
typename _ExtractKey, typename _Equal,
typename _Hash, typename _RangeHash, typename _Unused,
@@ -2398,22 +2424,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::
_M_insert_range_multi(_InputIterator __first, _InputIterator __last)
{
- using __pair_type = std::pair<bool, std::size_t>;
-
- size_type __n_elt = __detail::__distance_fw(__first, __last);
- if (__n_elt == 0)
- return;
-
- __rehash_guard_t __rehash_guard(_M_rehash_policy);
- __pair_type __do_rehash
- = _M_rehash_policy._M_need_rehash(_M_bucket_count,
- _M_element_count,
- __n_elt);
-
- if (__do_rehash.first)
- _M_rehash(__do_rehash.second, false_type{});
-
- __rehash_guard._M_guarded_obj = nullptr;
+ _M_rehash_insert(__detail::__distance_fw(__first, __last));
for (; __first != __last; ++__first)
_M_emplace_multi(cend(), *__first);
}
diff --git a/libstdc++-v3/include/bits/unordered_set.h
b/libstdc++-v3/include/bits/unordered_set.h
index fc9d584c036..361ead0068c 100644
--- a/libstdc++-v3/include/bits/unordered_set.h
+++ b/libstdc++-v3/include/bits/unordered_set.h
@@ -34,6 +34,9 @@
#include <bits/allocator.h>
#include <bits/functional_hash.h> // hash
#include <bits/stl_function.h> // equal_to
+#if __glibcxx_ranges_to_container // C++ >= 23
+# include <bits/ranges_base.h> // ranges::begin, ranges::distance etc.
+#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
@@ -268,6 +271,43 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
: unordered_set(__l, __n, __hf, key_equal(), __a)
{ }
+#if __glibcxx_ranges_to_container // C++ >= 23
+ /**
+ * @brief Builds an %unordered_set from an initializer_list.
+ * @since C++23
+ * @param __rg An input range of elements that can be converted to
+ * the list's value type.
+ * @param __l An initializer_list.
+ * @param __n Minimal initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ *
+ * Create an %unordered_set consisting of copies of the elements in the
+ * list. This is linear in N (where N is @a std::ranges::size(__rg)).
+ */
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ unordered_set(from_range_t, _Rg&& __rg,
+ size_type __n = 0,
+ const hasher& __hf = hasher(),
+ const key_equal& __eql = key_equal(),
+ const allocator_type& __a = allocator_type())
+ : _M_h(__n, __hf, __eql, __a)
+ { insert_range(std::forward<_Rg>(__rg)); }
+
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ unordered_set(from_range_t, _Rg&& __rg, size_type __n,
+ const allocator_type& __a)
+ : _M_h(__n, hasher(), key_equal(), __a)
+ { insert_range(std::forward<_Rg>(__rg)); }
+
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ unordered_set(from_range_t, _Rg&& __rg, size_type __n,
+ const hasher& __hf, const allocator_type& __a)
+ : _M_h(__n, __hf, key_equal(), __a)
+ { insert_range(std::forward<_Rg>(__rg)); }
+#endif
+
/// Copy assignment operator.
unordered_set&
operator=(const unordered_set&) = default;
@@ -487,6 +527,24 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
insert(initializer_list<value_type> __l)
{ _M_h.insert(__l); }
+#if __glibcxx_ranges_to_container // C++ >= 23
+ /**
+ * @brief Inserts a range of elements.
+ * @since C++23
+ * @param __rg An input range of elements that can be converted to
+ * the list's value type.
+ */
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ void
+ insert_range(_Rg&& __rg)
+ {
+ auto __first = ranges::begin(__rg);
+ const auto __last = ranges::end(__rg);
+ for (; __first != __last; ++__first)
+ _M_h.emplace(*__first);
+ }
+#endif
+
#ifdef __glibcxx_node_extract // >= C++17 && HOSTED
/// Extract a node.
node_type
@@ -942,6 +1000,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
unordered_set<int>::size_type, _Allocator)
-> unordered_set<_Tp, hash<_Tp>, equal_to<_Tp>, _Allocator>;
+
template<typename _Tp, typename _Hash, typename _Allocator,
typename = _RequireNotAllocatorOrIntegral<_Hash>,
typename = _RequireAllocator<_Allocator>>
@@ -949,6 +1008,42 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
unordered_set<int>::size_type, _Hash, _Allocator)
-> unordered_set<_Tp, _Hash, equal_to<_Tp>, _Allocator>;
+
+#if __glibcxx_ranges_to_container // C++ >= 23
+ template<ranges::input_range _Rg,
+ __not_allocator_like _Hash = hash<ranges::range_value_t<_Rg>>,
+ __not_allocator_like _Pred = equal_to<ranges::range_value_t<_Rg>>,
+ __allocator_like _Allocator = allocator<ranges::range_value_t<_Rg>>>
+ unordered_set(from_range_t, _Rg&&, unordered_set<int>::size_type = {},
+ _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator())
+ -> unordered_set<ranges::range_value_t<_Rg>, _Hash, _Pred, _Allocator>;
+
+ template<ranges::input_range _Rg,
+ __allocator_like _Allocator>
+ unordered_set(from_range_t, _Rg&&, unordered_set<int>::size_type,
+ _Allocator)
+ -> unordered_set<ranges::range_value_t<_Rg>,
+ hash<ranges::range_value_t<_Rg>>,
+ equal_to<ranges::range_value_t<_Rg>>,
+ _Allocator>;
+
+ template<ranges::input_range _Rg,
+ __allocator_like _Allocator>
+ unordered_set(from_range_t, _Rg&&, _Allocator)
+ -> unordered_set<ranges::range_value_t<_Rg>,
+ hash<ranges::range_value_t<_Rg>>,
+ equal_to<ranges::range_value_t<_Rg>>,
+ _Allocator>;
+
+ template<ranges::input_range _Rg,
+ __not_allocator_like _Hash,
+ __allocator_like _Allocator>
+ unordered_set(from_range_t, _Rg&&, unordered_set<int>::size_type,
+ _Hash, _Allocator)
+ -> unordered_set<ranges::range_value_t<_Rg>, _Hash,
+ equal_to<ranges::range_value_t<_Rg>>,
+ _Allocator>;
+#endif
#endif
/**
@@ -1150,6 +1245,44 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
: unordered_multiset(__l, __n, __hf, key_equal(), __a)
{ }
+#if __glibcxx_ranges_to_container // C++ >= 23
+ /**
+ * @brief Builds an %unordered_multiset from an initializer_list.
+ * @since C++23
+ * @param __rg An input range of elements that can be converted to
+ * the list's value type.
+ * @param __l An initializer_list.
+ * @param __n Minimal initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ *
+ * Create an %unordered_multiset consisting of copies of the elements
in the
+ * list. This is linear in N (where N is @a std::ranges::size(__rg)).
+ */
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ unordered_multiset(from_range_t, _Rg&& __rg,
+ size_type __n = 0,
+ const hasher& __hf = hasher(),
+ const key_equal& __eql = key_equal(),
+ const allocator_type& __a = allocator_type())
+ : _M_h(__n, __hf, __eql, __a)
+ { insert_range(std::forward<_Rg>(__rg)); }
+
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ unordered_multiset(from_range_t, _Rg&& __rg, size_type __n,
+ const allocator_type& __a)
+ : _M_h(__n, hasher(), key_equal(), __a)
+ { insert_range(std::forward<_Rg>(__rg)); }
+
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ unordered_multiset(from_range_t, _Rg&& __rg, size_type __n,
+ const hasher& __hf, const allocator_type& __a)
+ : _M_h(__n, __hf, key_equal(), __a)
+ { insert_range(std::forward<_Rg>(__rg)); }
+#endif
+
+
/**
* @brief %Unordered_multiset list assignment operator.
* @param __l An initializer_list.
@@ -1339,6 +1472,33 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
insert(initializer_list<value_type> __l)
{ _M_h.insert(__l); }
+#if __glibcxx_ranges_to_container // C++ >= 23
+ /**
+ * @brief Inserts a range of elements.
+ * @since C++23
+ * @param __rg An input range of elements that can be converted to
+ * the list's value type.
+ */
+ template<__detail::__container_compatible_range<_Value> _Rg>
+ void
+ insert_range(_Rg&& __rg)
+ {
+ auto __first = ranges::begin(__rg);
+ const auto __last = ranges::end(__rg);
+ if (__first == __last)
+ return;
+
+ if constexpr (ranges::forward_range<_Rg> || ranges::sized_range<_Rg>)
+ _M_h._M_rehash_insert(ranges::distance(__rg));
+ else
+ _M_h._M_rehash_insert(1);
+
+ for (; __first != __last; ++__first)
+ _M_h.emplace(*__first);
+ }
+#endif
+
+
#ifdef __glibcxx_node_extract // >= C++17 && HOSTED
/// Extract a node.
node_type
@@ -1807,6 +1967,45 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
unordered_multiset<int>::size_type, _Hash, _Allocator)
-> unordered_multiset<_Tp, _Hash, equal_to<_Tp>, _Allocator>;
+#if __glibcxx_ranges_to_container // C++ >= 23
+ template<ranges::input_range _Rg,
+ __not_allocator_like _Hash = hash<ranges::range_value_t<_Rg>>,
+ __not_allocator_like _Pred = equal_to<ranges::range_value_t<_Rg>>,
+ __allocator_like _Allocator = allocator<ranges::range_value_t<_Rg>>>
+ unordered_multiset(from_range_t, _Rg&&,
+ unordered_multiset<int>::size_type = {},
+ _Hash = _Hash(), _Pred = _Pred(),
+ _Allocator = _Allocator())
+ -> unordered_multiset<ranges::range_value_t<_Rg>, _Hash, _Pred,
_Allocator>;
+
+ template<ranges::input_range _Rg,
+ __allocator_like _Allocator>
+ unordered_multiset(from_range_t, _Rg&&, _Allocator)
+ -> unordered_multiset<ranges::range_value_t<_Rg>,
+ hash<ranges::range_value_t<_Rg>>,
+ equal_to<ranges::range_value_t<_Rg>>,
+ _Allocator>;
+
+ template<ranges::input_range _Rg,
+ __allocator_like _Allocator>
+ unordered_multiset(from_range_t, _Rg&&, unordered_multiset<int>::size_type,
+ _Allocator)
+ -> unordered_multiset<ranges::range_value_t<_Rg>,
+ hash<ranges::range_value_t<_Rg>>,
+ equal_to<ranges::range_value_t<_Rg>>,
+ _Allocator>;
+
+ template<ranges::input_range _Rg,
+ __not_allocator_like _Hash,
+ __allocator_like _Allocator>
+ unordered_multiset(from_range_t, _Rg&&,
+ unordered_multiset<int>::size_type,
+ _Hash, _Allocator)
+ -> unordered_multiset<ranges::range_value_t<_Rg>, _Hash,
+ equal_to<ranges::range_value_t<_Rg>>,
+ _Allocator>;
+#endif
+
#endif
template<class _Value, class _Hash, class _Pred, class _Alloc>
diff --git
a/libstdc++-v3/testsuite/23_containers/unordered_multiset/cons/from_range.cc
b/libstdc++-v3/testsuite/23_containers/unordered_multiset/cons/from_range.cc
new file mode 100644
index 00000000000..5e9460a44fa
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/unordered_multiset/cons/from_range.cc
@@ -0,0 +1,201 @@
+// { dg-do run { target c++23 } }
+
+#include <algorithm>
+#include <unordered_set>
+#include <span>
+#include <testsuite_allocator.h>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+struct StateHash {
+ int state = 17;
+
+ template<typename T>
+ size_t operator()(T const& t) const {
+ return std::hash<T>()(t) + 43;
+ }
+};
+
+struct StateEq {
+ int state = 7;
+
+ template<typename T, typename U>
+ bool operator()(T const& l, U const & r) const {
+ return l == r;
+ }
+};
+
+void
+test_deduction_guide(long* p)
+{
+ __gnu_test::test_input_range<long> r(p, p);
+ std::unordered_multiset s(std::from_range, r);
+ static_assert(std::is_same_v<decltype(s), std::unordered_multiset<long>>);
+
+ std::unordered_multiset s2(std::from_range, r, 0);
+ static_assert(std::is_same_v<decltype(s2), std::unordered_multiset<long>>);
+
+ StateHash hf;
+ std::unordered_multiset s3(std::from_range, r, 0, hf);
+ static_assert(std::is_same_v<
+ decltype(s3),
+ std::unordered_multiset<long, StateHash>>);
+
+ StateEq eq;
+ std::unordered_multiset s4(std::from_range, r, 0, hf, eq);
+ static_assert(std::is_same_v<
+ decltype(s4),
+ std::unordered_multiset<long, StateHash, StateEq>>);
+
+ using Alloc = __gnu_test::SimpleAllocator<long>;
+ Alloc alloc;
+ // LWG2713: there is no matching constructor
+ // std::unordered_multiset s5(std::from_range, r, alloc);
+ // static_assert(std::is_same_v<
+ // decltype(s5),
+ // std::unordered_multiset<long, std::hash<long>, std::equal_to<long>,
Alloc>>);
+
+ std::unordered_multiset s6(std::from_range, r, 0, alloc);
+ static_assert(std::is_same_v<
+ decltype(s6),
+ std::unordered_multiset<long, std::hash<long>, std::equal_to<long>,
Alloc>>);
+
+ std::unordered_multiset s7(std::from_range, r, 0, hf, alloc);
+ static_assert(std::is_same_v<
+ decltype(s7),
+ std::unordered_multiset<long, StateHash, std::equal_to<long>, Alloc>>);
+
+ std::unordered_multiset s8(std::from_range, r, 0, hf, eq, alloc);
+ static_assert(std::is_same_v<
+ decltype(s8),
+ std::unordered_multiset<long, StateHash, StateEq, Alloc>>);
+}
+
+template<typename T, typename U>
+constexpr bool is_equal(std::hash<T>, std::hash<U>)
+{ return true; }
+
+template<typename T, typename U>
+constexpr bool is_equal(std::equal_to<T>, std::equal_to<U>)
+{ return true; }
+
+constexpr bool is_equal(StateHash lhs, StateHash rhs)
+{ return lhs.state = rhs.state; }
+
+
+constexpr bool is_equal(StateEq lhs, StateEq rhs)
+{ return lhs.state = rhs.state; }
+
+template<typename Range, typename Alloc, typename Hash, typename Equal>
+constexpr void
+do_test(Alloc alloc, Hash hf, Equal eqf)
+{
+ // The unordered_multiset's value_typ.
+ using V = typename Alloc::value_type;
+
+ // The range's value_type.
+ using T = std::ranges::range_value_t<Range>;
+ T a[]{1,2,3,4,5,6,7,8,9,1,2,3,4,5};
+
+ auto eq = [&](std::unordered_multiset<V, Hash, Equal, Alloc> const& l,
+ std::span<T> r) {
+ if (l.size() != r.size())
+ return false;
+
+ return std::ranges::is_permutation(l, r, eqf);
+ };
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ s0(std::from_range, Range(a, a+0));
+ VERIFY( s0.empty() );
+ VERIFY( is_equal(s0.hash_function(), Hash()) );
+ VERIFY( is_equal(s0.key_eq(), Equal()) );
+ VERIFY( s0.get_allocator() == Alloc() );
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ s4(std::from_range, Range(a, a+4), 2);
+ VERIFY( eq(s4, {a, 4}) );
+ VERIFY( s4.bucket_count() >= 2 );
+ VERIFY( is_equal(s4.hash_function(), Hash()) );
+ VERIFY( is_equal(s4.key_eq(), Equal()) );
+ VERIFY( s4.get_allocator() == Alloc() );
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ s7(std::from_range, Range(a, a+7), 3, hf);
+ VERIFY( eq(s7, {a, 7}) );
+ VERIFY( s7.bucket_count() >= 3 );
+ VERIFY( is_equal(s7.hash_function(), hf) );
+ VERIFY( is_equal(s7.key_eq(), Equal()) );
+ VERIFY( s7.get_allocator() == Alloc() );
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ s9(std::from_range, Range(a, a+9), 5, hf, eqf);
+ VERIFY( eq(s9, {a, 9}) );
+ VERIFY( s9.bucket_count() >= 5 );
+ VERIFY( s9.get_allocator() == Alloc() );
+ VERIFY( is_equal(s9.hash_function(), hf) );
+ VERIFY( is_equal(s9.key_eq(), eqf) );
+
+ // LWG2713: there is no matching constructor
+ // std::unordered_multiset<V, Hash, Equal, Alloc>
+ // sa(std::from_range, Range(a, a+14), 1, alloc);
+ // VERIFY( eq(sa1, {a, 14}) );
+ // VERIFY( is_equal(sa1.hash_function(), Hash()) );
+ // VERIFY( is_equal(sa1.key_eq(), Equal()) );
+ // VERIFY( sa1.get_allocator() == alloc );
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ sa2(std::from_range, Range(a, a+14), 2, alloc);
+ VERIFY( eq(sa2, {a, 14}) );
+ VERIFY( sa2.bucket_count() >= 2 );
+ VERIFY( is_equal(sa2.hash_function(), Hash()) );
+ VERIFY( is_equal(sa2.key_eq(), Equal()) );
+ VERIFY( sa2.get_allocator() == alloc );
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ sa3(std::from_range, Range(a, a+14), 3, hf, alloc);
+ VERIFY( eq(sa3, {a, 14}) );
+ VERIFY( sa3.bucket_count() >= 3 );
+ VERIFY( is_equal(sa3.hash_function(), hf) );
+ VERIFY( is_equal(sa3.key_eq(), Equal()) );
+ VERIFY( sa3.get_allocator() == alloc );
+
+ std::unordered_multiset<V, Hash, Equal, Alloc>
+ sa4(std::from_range, Range(a, a+14), 5, hf, eqf, alloc);
+ VERIFY( eq(sa4, {a, 14}) );
+ VERIFY( sa4.bucket_count() >= 5 );
+ VERIFY( is_equal(sa4.hash_function(), hf) );
+ VERIFY( is_equal(sa4.key_eq(), eqf) );
+ VERIFY( sa4.get_allocator() == alloc );
+}
+
+template<typename Range>
+void
+do_test_ahe()
+{
+ do_test<Range>(std::allocator<int>(),
+ std::hash<int>(), std::equal_to<int>());
+ do_test<Range>(std::allocator<int>(),
+ StateHash{27}, StateEq{17});
+ do_test<Range>(__gnu_test::uneq_allocator<int>(42),
+ std::hash<int>(), std::equal_to<int>());
+ do_test<Range>(__gnu_test::uneq_allocator<int>(42),
+ StateHash{27}, StateEq{17});
+}
+
+bool
+test_ranges()
+{
+ using namespace __gnu_test;
+
+ do_test_ahe<test_forward_range<int>>();
+ do_test_ahe<test_range_nocopy<int, input_iterator_wrapper_nocopy>>();
+ do_test_ahe<test_forward_range<short>>();
+
+ return true;
+}
+
+int main()
+{
+ test_ranges();
+}
diff --git
a/libstdc++-v3/testsuite/23_containers/unordered_multiset/modifiers/insert_range.cc
b/libstdc++-v3/testsuite/23_containers/unordered_multiset/modifiers/insert_range.cc
new file mode 100644
index 00000000000..efb66bd5772
--- /dev/null
+++
b/libstdc++-v3/testsuite/23_containers/unordered_multiset/modifiers/insert_range.cc
@@ -0,0 +1,62 @@
+// { dg-do run { target c++23 } }
+
+#include <algorithm>
+#include <unordered_set>
+#include <span>
+#include <testsuite_allocator.h>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+template<typename Range, typename V>
+constexpr void
+do_test()
+{
+ // The range's value_type.
+ using T = std::ranges::range_value_t<Range>;
+ T a[]{1,2,3,4,5,6,7,8,9,1,2,3,4,5};
+
+ auto eq = [&](std::unordered_multiset<V> const& l,
+ std::span<T> r) {
+ if (l.size() != r.size())
+ return false;
+
+ return std::ranges::is_permutation(l, r);
+ };
+
+ std::unordered_multiset<V> s;
+ s.insert_range(Range(a, a+0));
+ VERIFY( s.empty() );
+
+ s.insert_range(Range(a, a+4));
+ VERIFY( eq(s, {a, 4}) );
+
+ s.insert_range(Range(a+4, a+9));
+ VERIFY( eq(s, {a, 9}) );
+
+ s.insert_range(Range(a+9, a+14));
+ VERIFY( eq(s, {a, 14}) );
+}
+
+template<typename Range>
+void
+do_test_v()
+{
+ do_test<Range, int>();
+}
+
+bool
+test_ranges()
+{
+ using namespace __gnu_test;
+
+ do_test_v<test_forward_range<int>>();
+ do_test_v<test_range_nocopy<int, input_iterator_wrapper_nocopy>>();
+ do_test_v<test_forward_range<short>>();
+
+ return true;
+}
+
+int main()
+{
+ test_ranges();
+}
diff --git
a/libstdc++-v3/testsuite/23_containers/unordered_set/cons/from_range.cc
b/libstdc++-v3/testsuite/23_containers/unordered_set/cons/from_range.cc
new file mode 100644
index 00000000000..3fe06a1d740
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/unordered_set/cons/from_range.cc
@@ -0,0 +1,201 @@
+// { dg-do run { target c++23 } }
+
+#include <algorithm>
+#include <unordered_set>
+#include <span>
+#include <testsuite_allocator.h>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+struct StateHash {
+ int state = 17;
+
+ template<typename T>
+ size_t operator()(T const& t) const {
+ return std::hash<T>()(t) + 43;
+ }
+};
+
+struct StateEq {
+ int state = 7;
+
+ template<typename T, typename U>
+ bool operator()(T const& l, U const & r) const {
+ return l == r;
+ }
+};
+
+void
+test_deduction_guide(long* p)
+{
+ __gnu_test::test_input_range<long> r(p, p);
+ std::unordered_set s(std::from_range, r);
+ static_assert(std::is_same_v<decltype(s), std::unordered_set<long>>);
+
+ std::unordered_set s2(std::from_range, r, 0);
+ static_assert(std::is_same_v<decltype(s2), std::unordered_set<long>>);
+
+ StateHash hf;
+ std::unordered_set s3(std::from_range, r, 0, hf);
+ static_assert(std::is_same_v<
+ decltype(s3),
+ std::unordered_set<long, StateHash>>);
+
+ StateEq eq;
+ std::unordered_set s4(std::from_range, r, 0, hf, eq);
+ static_assert(std::is_same_v<
+ decltype(s4),
+ std::unordered_set<long, StateHash, StateEq>>);
+
+ using Alloc = __gnu_test::SimpleAllocator<long>;
+ Alloc alloc;
+ // LWG2713: there is no matching constructor
+ // std::unordered_set s5(std::from_range, r, alloc);
+ // static_assert(std::is_same_v<
+ // decltype(s5),
+ // std::unordered_set<long, std::hash<long>, std::equal_to<long>, Alloc>>);
+
+ std::unordered_set s6(std::from_range, r, 0, alloc);
+ static_assert(std::is_same_v<
+ decltype(s6),
+ std::unordered_set<long, std::hash<long>, std::equal_to<long>, Alloc>>);
+
+ std::unordered_set s7(std::from_range, r, 0, hf, alloc);
+ static_assert(std::is_same_v<
+ decltype(s7),
+ std::unordered_set<long, StateHash, std::equal_to<long>, Alloc>>);
+
+ std::unordered_set s8(std::from_range, r, 0, hf, eq, alloc);
+ static_assert(std::is_same_v<
+ decltype(s8),
+ std::unordered_set<long, StateHash, StateEq, Alloc>>);
+}
+
+template<typename T, typename U>
+constexpr bool is_equal(std::hash<T>, std::hash<U>)
+{ return true; }
+
+template<typename T, typename U>
+constexpr bool is_equal(std::equal_to<T>, std::equal_to<U>)
+{ return true; }
+
+constexpr bool is_equal(StateHash lhs, StateHash rhs)
+{ return lhs.state = rhs.state; }
+
+
+constexpr bool is_equal(StateEq lhs, StateEq rhs)
+{ return lhs.state = rhs.state; }
+
+template<typename Range, typename Alloc, typename Hash, typename Equal>
+constexpr void
+do_test(Alloc alloc, Hash hf, Equal eqf)
+{
+ // The unordered_set's value_typ.
+ using V = typename Alloc::value_type;
+
+ // The range's value_type.
+ using T = std::ranges::range_value_t<Range>;
+ T a[]{1,2,3,4,5,6,7,8,9,1,2,3,4,5};
+
+ auto eq = [&](std::unordered_set<V, Hash, Equal, Alloc> const& l,
+ std::span<T> r) {
+ if (l.size() != r.size())
+ return false;
+
+ return std::ranges::is_permutation(l, r, eqf);
+ };
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ s0(std::from_range, Range(a, a+0));
+ VERIFY( s0.empty() );
+ VERIFY( is_equal(s0.hash_function(), Hash()) );
+ VERIFY( is_equal(s0.key_eq(), Equal()) );
+ VERIFY( s0.get_allocator() == Alloc() );
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ s4(std::from_range, Range(a, a+4), 2);
+ VERIFY( eq(s4, {a, 4}) );
+ VERIFY( s4.bucket_count() >= 2 );
+ VERIFY( is_equal(s4.hash_function(), Hash()) );
+ VERIFY( is_equal(s4.key_eq(), Equal()) );
+ VERIFY( s4.get_allocator() == Alloc() );
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ s7(std::from_range, Range(a, a+7), 3, hf);
+ VERIFY( eq(s7, {a, 7}) );
+ VERIFY( s7.bucket_count() >= 3 );
+ VERIFY( is_equal(s7.hash_function(), hf) );
+ VERIFY( is_equal(s7.key_eq(), Equal()) );
+ VERIFY( s7.get_allocator() == Alloc() );
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ s9(std::from_range, Range(a, a+9), 5, hf, eqf);
+ VERIFY( eq(s9, {a, 9}) );
+ VERIFY( s9.bucket_count() >= 5 );
+ VERIFY( s9.get_allocator() == Alloc() );
+ VERIFY( is_equal(s9.hash_function(), hf) );
+ VERIFY( is_equal(s9.key_eq(), eqf) );
+
+ // LWG2713: there is no matching constructor
+ // std::unordered_set<V, Hash, Equal, Alloc>
+ // sa(std::from_range, Range(a, a+14), 1, alloc);
+ // VERIFY( eq(sa1, {a, 9}) );
+ // VERIFY( is_equal(sa1.hash_function(), Hash()) );
+ // VERIFY( is_equal(sa1.key_eq(), Equal()) );
+ // VERIFY( sa1.get_allocator() == alloc );
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ sa2(std::from_range, Range(a, a+14), 2, alloc);
+ VERIFY( eq(sa2, {a, 9}) );
+ VERIFY( sa2.bucket_count() >= 2 );
+ VERIFY( is_equal(sa2.hash_function(), Hash()) );
+ VERIFY( is_equal(sa2.key_eq(), Equal()) );
+ VERIFY( sa2.get_allocator() == alloc );
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ sa3(std::from_range, Range(a, a+14), 3, hf, alloc);
+ VERIFY( eq(sa3, {a, 9}) );
+ VERIFY( sa3.bucket_count() >= 3 );
+ VERIFY( is_equal(sa3.hash_function(), hf) );
+ VERIFY( is_equal(sa3.key_eq(), Equal()) );
+ VERIFY( sa3.get_allocator() == alloc );
+
+ std::unordered_set<V, Hash, Equal, Alloc>
+ sa4(std::from_range, Range(a, a+14), 5, hf, eqf, alloc);
+ VERIFY( eq(sa4, {a, 9}) );
+ VERIFY( sa4.bucket_count() >= 5 );
+ VERIFY( is_equal(sa4.hash_function(), hf) );
+ VERIFY( is_equal(sa4.key_eq(), eqf) );
+ VERIFY( sa4.get_allocator() == alloc );
+}
+
+template<typename Range>
+void
+do_test_ahe()
+{
+ do_test<Range>(std::allocator<int>(),
+ std::hash<int>(), std::equal_to<int>());
+ do_test<Range>(std::allocator<int>(),
+ StateHash{27}, StateEq{17});
+ do_test<Range>(__gnu_test::uneq_allocator<int>(42),
+ std::hash<int>(), std::equal_to<int>());
+ do_test<Range>(__gnu_test::uneq_allocator<int>(42),
+ StateHash{27}, StateEq{17});
+}
+
+bool
+test_ranges()
+{
+ using namespace __gnu_test;
+
+ do_test_ahe<test_forward_range<int>>();
+ do_test_ahe<test_range_nocopy<int, input_iterator_wrapper_nocopy>>();
+ do_test_ahe<test_forward_range<short>>();
+
+ return true;
+}
+
+int main()
+{
+ test_ranges();
+}
diff --git
a/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert_range.cc
b/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert_range.cc
new file mode 100644
index 00000000000..9c74ac5f9b4
--- /dev/null
+++
b/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/insert_range.cc
@@ -0,0 +1,65 @@
+// { dg-do run { target c++23 } }
+
+#include <algorithm>
+#include <unordered_set>
+#include <span>
+#include <testsuite_allocator.h>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+template<typename Range, typename V>
+constexpr void
+do_test()
+{
+ // The range's value_type.
+ using T = std::ranges::range_value_t<Range>;
+ T a[]{1,2,3,4,5,6,7,8,9,1,2,3,4,5};
+
+ auto eq = [&](std::unordered_set<V> const& l,
+ std::span<T> r) {
+ if (l.size() != r.size())
+ return false;
+
+ return std::ranges::is_permutation(l, r);
+ };
+
+ std::unordered_set<V> s;
+ s.insert_range(Range(a, a+0));
+ VERIFY( s.empty() );
+
+ s.insert_range(Range(a, a+4));
+ VERIFY( eq(s, {a, 4}) );
+
+ s.insert_range(Range(a+4, a+7));
+ VERIFY( eq(s, {a, 7}) );
+
+ s.insert_range(Range(a, a+9));
+ VERIFY( eq(s, {a, 9}) );
+
+ s.insert_range(Range(a, a+14));
+ VERIFY( eq(s, {a, 9}) );
+}
+
+template<typename Range>
+void
+do_test_v()
+{
+ do_test<Range, int>();
+}
+
+bool
+test_ranges()
+{
+ using namespace __gnu_test;
+
+ do_test_v<test_forward_range<int>>();
+ do_test_v<test_range_nocopy<int, input_iterator_wrapper_nocopy>>();
+ do_test_v<test_forward_range<short>>();
+
+ return true;
+}
+
+int main()
+{
+ test_ranges();
+}
--
2.48.1
