fixed iterator ++ bugs

Author: TusharChugh

include/forward_tlist/forward_tlist_iterator.h

@@ -12,14 +12,23 @@ namespace tlib {
     public:
         using iterator_category = std::forward_iterator_tag;
         using value_type = T;
-        using forward_tlist_iterator_base = typename std::iterator<std::forward_iterator_tag, T, difference_type, pointer, reference>;
+        using forward_tlist_iterator_type = forward_tlist_iterator<value_type, difference_type, pointer, reference>;
         using node_pointer = tlib::forward_tlist_node<T> *;
 
         reference operator*() {
             return pointee->element;
         }
-        const forward_tlist_iterator_base& operator++();
-        bool operator!=(const forward_tlist_iterator_base& other) const;
+
+        const forward_tlist_iterator_type& operator++() {
+            pointee = pointee->next;
+            return *this;
+        }
+
+        bool operator!=(const forward_tlist_iterator_type& other) const {
+            return pointee != other.pointee;
+        };
+
+        forward_tlist_iterator() { }
 
     private:
         forward_tlist_node<T> *pointee;

test/forward_tlist/forward_tlist_iterator_test.cpp

@@ -1,5 +1,6 @@
 #include <gtest/gtest.h>
 #include "forward_tlist/forward_tlist.h"
+#include <forward_list>
 
 TEST(ITERATOR, ITERATOR) {
     tlib::forward_tlist<int> int_list;
@@ -19,4 +20,31 @@ TEST(CONST_ITERATOR, CONST_ITERATOR) {
     auto iterator_end = int_list.end();
     ASSERT_EQ(*iterator_begin, 2);
     ASSERT_EQ(*iterator_end, NULL);
-}
+}
+
+TEST(ITERATOR_PLUS, ITERATOR_PLUS) {
+    tlib::forward_tlist<int> int_tlist;
+    int_tlist.push_front(1);
+    int_tlist.push_front(2);
+
+    std::forward_list<int> int_list;
+    int_list.push_front(1);
+    int_list.push_front(2);
+
+    tlib::forward_tlist<int>::iterator tlist_iterator = int_tlist.begin();
+    std::forward_list<int>::iterator list_iterator;
+    for(list_iterator = int_list.begin();
+        tlist_iterator != int_tlist.end() && list_iterator != int_list.end(); ++tlist_iterator, ++list_iterator) {
+        ASSERT_EQ(*tlist_iterator, *list_iterator);
+    }
+}
+
+TEST(AUTO_ITERATOR, AUTO_ITERATOR_AU_Test) {
+    tlib::forward_tlist<int> int_tlist;
+    int_tlist.push_front(1);
+    int_tlist.push_front(2);
+
+   for(auto element: int_tlist) {
+       std::cout<<element<<" ";
+   }std::cout<<std::endl;
+}