libcxx initial import

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

test/containers/unord/unord.set/insert_const_lvalue.pass.cpp

@@ -0,0 +1,48 @@
+//===----------------------------------------------------------------------===//
+//
+// <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_set>
+
+// template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
+//           class Alloc = allocator<Value>>
+// class unordered_set
+
+// pair<iterator, bool> insert(const value_type& x);
+
+#include <unordered_set>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef std::unordered_set<double> C;
+        typedef std::pair<C::iterator, bool> R;
+        typedef C::value_type P;
+        C c;
+        R r = c.insert(P(3.5));
+        assert(c.size() == 1);
+        assert(*r.first == 3.5);
+        assert(r.second);
+
+        r = c.insert(P(3.5));
+        assert(c.size() == 1);
+        assert(*r.first == 3.5);
+        assert(!r.second);
+
+        r = c.insert(P(4.5));
+        assert(c.size() == 2);
+        assert(*r.first == 4.5);
+        assert(r.second);
+
+        r = c.insert(P(5.5));
+        assert(c.size() == 3);
+        assert(*r.first == 5.5);
+        assert(r.second);
+    }
+}