From 01a665a876ab04aa212a3a80c9c1ce2e685bf5c4 Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Wed, 23 Jan 2019 23:06:18 +0000
Subject: [PATCH] Apply D28248: 'Work around GCC PR37804'. Thanks to mdaniels
 for the patch

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@351993 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/__tree                                |  7 +++++++
 .../associative/map/gcc_workaround.pass.cpp   | 21 +++++++++++++++++++
 .../associative/set/gcc_workaround.pass.cpp   | 21 +++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 test/std/containers/associative/map/gcc_workaround.pass.cpp
 create mode 100644 test/std/containers/associative/set/gcc_workaround.pass.cpp

diff --git a/include/__tree b/include/__tree
index 4144a9599..9f0931ee9 100644
--- a/include/__tree
+++ b/include/__tree
@@ -26,6 +26,13 @@ _LIBCPP_PUSH_MACROS
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+#if defined(__GNUC__) && !defined(__clang__) // gcc.gnu.org/PR37804
+template <class, class, class, class> class _LIBCPP_TEMPLATE_VIS map;
+template <class, class, class, class> class _LIBCPP_TEMPLATE_VIS multimap;
+template <class, class, class> class _LIBCPP_TEMPLATE_VIS set;
+template <class, class, class> class _LIBCPP_TEMPLATE_VIS multiset;
+#endif
+
 template <class _Tp, class _Compare, class _Allocator> class __tree;
 template <class _Tp, class _NodePtr, class _DiffType>
     class _LIBCPP_TEMPLATE_VIS __tree_iterator;
diff --git a/test/std/containers/associative/map/gcc_workaround.pass.cpp b/test/std/containers/associative/map/gcc_workaround.pass.cpp
new file mode 100644
index 000000000..622449fac
--- /dev/null
+++ b/test/std/containers/associative/map/gcc_workaround.pass.cpp
@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// Tests workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37804
+
+#include <map>
+std::map<int,int>::iterator it;
+#include <set>
+using std::set;
+using std::multiset;
+
+int main(void)
+{
+       return 0;
+}
diff --git a/test/std/containers/associative/set/gcc_workaround.pass.cpp b/test/std/containers/associative/set/gcc_workaround.pass.cpp
new file mode 100644
index 000000000..2b923b773
--- /dev/null
+++ b/test/std/containers/associative/set/gcc_workaround.pass.cpp
@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// Tests workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37804
+
+#include <set>
+std::set<int> s;
+#include <map>
+using std::map;
+using std::multimap;
+
+int main(void)
+{
+       return 0;
+}