added less-/greater-equal utility functions

src/storm/utility/constants.h

@@ -47,6 +47,22 @@ namespace storm {
                 typedef DoubleLess type;
             };
 
+            template<typename ValueType>
+            struct ElementLessEqual {
+                typedef std::less_equal<ValueType> type;
+            };
+
+            struct DoubleLessEqual {
+                bool operator()(double a, double b) const {
+                    return (a == 0.0 && b >= 0.0) || (b - a >= 1e-17);
+                }
+            };
+
+            template<>
+            struct ElementLessEqual<double> {
+                typedef DoubleLessEqual type;
+            };
+
             template<typename ValueType>
             struct ElementGreater {
                 typedef std::greater<ValueType> type;
@@ -62,6 +78,22 @@ namespace storm {
             struct ElementGreater<double> {
                 typedef DoubleGreater type;
             };
+
+            template<typename ValueType>
+            struct ElementGreaterEqual {
+                typedef std::greater_equal<ValueType> type;
+            };
+
+            struct DoubleGreaterEqual {
+                bool operator()(double a, double b) const {
+                    return (b == 0.0 && a >= 0.0) || (a - b >= 1e-17);
+                }
+            };
+
+            template<>
+            struct ElementGreaterEqual<double> {
+                typedef DoubleGreaterEqual type;
+            };
         }
 
         template<typename ValueType>
@@ -70,6 +102,12 @@ namespace storm {
         template<typename ValueType>
         using ElementGreater = typename detail::ElementGreater<ValueType>::type;
 
+        template<typename ValueType>
+        using ElementLessEqual = typename detail::ElementLessEqual<ValueType>::type;
+
+        template<typename ValueType>
+        using ElementGreaterEqual = typename detail::ElementGreaterEqual<ValueType>::type;
+
         template<typename ValueType>
         ValueType one();