1 files changed, 28 insertions, 0 deletions
diff --git a/libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp b/libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp
new file mode 100644
index 00000000000..3ff9c0f1ff9
--- /dev/null
+++ b/libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char/lt.pass.cpp
@@ -0,0 +1,28 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+
+// template<> struct char_traits<char>
+
+// static constexpr bool lt(char_type c1, char_type c2);
+
+#include <string>
+#include <cassert>
+
+int main()
+{
+    char c = '\0';
+    assert(!std::char_traits<char>::lt('a', 'a'));
+    assert( std::char_traits<char>::lt('A', 'a'));
+    assert(!std::char_traits<char>::lt('A' + 127, 'a'));
+    assert(!std::char_traits<char>::lt('A' - 127, 'a'));
+    assert( std::char_traits<char>::lt('A', 'a' + 127));
+    assert( std::char_traits<char>::lt('A', 'a' - 127));
+}