libcxx initial import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/unord/unord.multimap/reserve.pass.cpp

@@ -0,0 +1,61 @@
+//===----------------------------------------------------------------------===//
+//
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <unordered_map>
+
+// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
+//           class Alloc = allocator<pair<const Key, T>>>
+// class unordered_multimap
+
+// void rehash(size_type n);
+
+#include <unordered_map>
+#include <string>
+#include <cassert>
+
+void test(const std::unordered_multimap<int, std::string>& c)
+{
+    assert(c.size() == 6);
+    assert(c.find(1)->second == "one");
+    assert(next(c.find(1))->second == "four");
+    assert(c.find(2)->second == "two");
+    assert(next(c.find(2))->second == "four");
+    assert(c.find(3)->second == "three");
+    assert(c.find(4)->second == "four");
+}
+
+int main()
+{
+    {
+        typedef std::unordered_multimap<int, std::string> C;
+        typedef std::pair<int, std::string> P;
+        P a[] =
+        {
+            P(1, "one"),
+            P(2, "two"),
+            P(3, "three"),
+            P(4, "four"),
+            P(1, "four"),
+            P(2, "four"),
+        };
+        C c(a, a + sizeof(a)/sizeof(a[0]));
+        test(c);
+        assert(c.bucket_count() >= 7);
+        c.reserve(3);
+        assert(c.bucket_count() == 7);
+        test(c);
+        c.max_load_factor(2);
+        c.reserve(3);
+        assert(c.bucket_count() == 3);
+        test(c);
+        c.reserve(31);
+        assert(c.bucket_count() == 17);
+        test(c);
+    }
+}