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-rw-r--r--vsprojects/config.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/vsprojects/config.h b/vsprojects/config.h
index e09f297..2c64450 100644
--- a/vsprojects/config.h
+++ b/vsprojects/config.h
@@ -5,7 +5,11 @@
#define HASH_MAP_H <hash_map>
/* the namespace of hash_map/hash_set */
-#if _MSC_VER < 1310
+// Apparently Microsoft decided to move hash_map *back* to the std namespace
+// in MSVC 2010:
+// http://blogs.msdn.com/vcblog/archive/2009/05/25/stl-breaking-changes-in-visual-studio-2010-beta-1.aspx
+// TODO(kenton): Use unordered_map instead, which is available in MSVC 2010.
+#if _MSC_VER < 1310 || _MSC_VER >= 1600
#define HASH_NAMESPACE std
#else
#define HASH_NAMESPACE stdext