Bring noexcept for <string> inline with other containers.

llvm-svn: 132573

1 files changed, 47 insertions, 0 deletions

diff --git a/libcxx/test/strings/basic.string/string.cons/move_assign_noexcept.pass.cpp b/libcxx/test/strings/basic.string/string.cons/move_assign_noexcept.pass.cpp
new file mode 100644
index 00000000000..fdcf4785fbc
--- /dev/null
+++ b/libcxx/test/strings/basic.string/string.cons/move_assign_noexcept.pass.cpp
@@ -0,0 +1,47 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// basic_string& operator=(basic_string&& c)
+//     noexcept(
+//          allocator_type::propagate_on_container_move_assignment::value &&
+//          is_nothrow_move_assignable<allocator_type>::value);
+
+// This tests a conforming extension
+
+#include <string>
+#include <cassert>
+
+#include "../test_allocator.h"
+
+template <class T>
+struct some_alloc
+{
+    typedef T value_type;
+    some_alloc(const some_alloc&);
+};
+
+int main()
+{
+#if __has_feature(cxx_noexcept)
+    {
+        typedef std::string C;
+        static_assert(std::is_nothrow_move_assignable<C>::value, "");
+    }
+    {
+        typedef std::basic_string<char, std::char_traits<char>, test_allocator<char>> C;
+        static_assert(!std::is_nothrow_move_assignable<C>::value, "");
+    }
+    {
+        typedef std::basic_string<char, std::char_traits<char>, some_alloc<char>> C;
+        static_assert(!std::is_nothrow_move_assignable<C>::value, "");
+    }
+#endif
+}