Ticket #680: fix_cpp_17_compilation_warnings.patch

lemon/maps.h

@@ -1969 +1969 @@
     /// be accessed in the <tt>[beginValue, endValue)</tt> range.
     /// They are considered with multiplicity, so each value is
     /// traversed for each item it is assigned to.
-    class ValueIt
-      : public std::iterator<std::forward_iterator_tag, Value> {
+    class ValueIt {
       friend class CrossRefMap;
     private:
       ValueIt(typename Container::const_iterator _it)
         : it(_it) {}
     public:
+      using iterator_category = std::forward_iterator_tag;
+      using value_type = Value;
+      using difference_type = void;
+      using pointer = void;
+      using reference = void;
 
       /// Constructor
       ValueIt() {}
@@ -3131 +3135 @@
     /// This iterator is an STL compatible forward
     /// iterator on the values of the map. The values can
     /// be accessed in the <tt>[beginValue, endValue)</tt> range.
-    class ValueIt
-      : public std::iterator<std::forward_iterator_tag, Value> {
+    class ValueIt {
       friend class IterableValueMap;
     private:
       ValueIt(typename std::map<Value, Key>::const_iterator _it)
         : it(_it) {}
     public:
+      using iterator_category = std::forward_iterator_tag;
+      using value_type = Value;
+      using difference_type = void;
+      using pointer = void;
+      using reference = void;
 
       /// Constructor
       ValueIt() {}