Further refactoring ackermannization.

src/ackermannization/ackr_helper.cpp

@@ -0,0 +1,29 @@
+/*++
+ Copyright (c) 2016 Microsoft Corporation
+
+ Module Name:
+
+  ackr_helper.cpp
+
+ Abstract:
+
+
+ Author:
+
+ Mikolas Janota (MikolasJanota)
+
+ Revision History:
+--*/
+#include"ackr_helper.h"
+
+double ackr_helper::calculate_lemma_bound(ackr_helper::fun2terms_map& occurrences) {
+    fun2terms_map::iterator it = occurrences.begin();
+    const fun2terms_map::iterator end = occurrences.end();
+    double total = 0;
+    for (; it != end; ++it) {
+        const unsigned fsz = it->m_value->size();
+        const double n2 = n_choose_2_chk(fsz);
+        total += n2;
+    }
+    return total;
+}