Undefine min/max in __tree

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@294099 91177308-0d34-0410-b5e6-96231b3b80d8

include/__tree

@@ -17,6 +17,8 @@
 #include <stdexcept>
 #include <algorithm>
 
+#include <__undef_min_max>
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
 #endif

test/libcxx/containers/associative/undef_min_max.pass.cpp

@@ -0,0 +1,22 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic ignored "-W#warnings"
+#endif
+
+#define min THIS IS A NASTY MACRO!
+#define max THIS IS A NASTY MACRO!
+
+#include <map>
+
+int main() {
+  std::map<int, int> m;
+  ((void)m);
+}