1 files changed, 32 insertions, 0 deletions
diff --git a/lib/functional.hh b/lib/functional.hh
new file mode 100644
index 0000000..3f4da4c
--- /dev/null
+++ b/lib/functional.hh
@@ -0,0 +1,32 @@
+#include <utility>
+
+struct Compare2ndRev
+{
+    template<typename T>
+    inline bool operator() (const T& a, const T& b) const
+    {
+        return a.second > b.second;
+    }
+};
+
+struct Compare1st
+{
+    template<typename T1, typename T2>
+    inline bool operator() (const std::pair<T1,T2>& a,
+                            const std::pair<T1,T2>& b) const
+    {
+        return a.first < b.first;
+    }
+
+    template<typename T1, typename T2>
+    inline bool operator() (const std::pair<T1,T2>& a, T1 b) const
+    {
+        return a.first < b;
+    }
+
+    template<typename T1, typename T2>
+    inline bool operator() (T1 a, const std::pair<T1,T2>& b) const
+    {
+        return a < b.first;
+    }
+};