remove unneeded iterator functions

src/util/approx_set.h

@@ -197,10 +197,6 @@ public:
             ++*this; 
             return tmp; 
         }
-
-        bool operator==(iterator const & it) const { 
-            return m_set == it.m_set;
-        }
         
         bool operator!=(iterator const & it) const { 
             return m_set != it.m_set; 

src/util/bit_vector.h

@@ -220,7 +220,6 @@ public:
         bool operator*() const { return b.get(m_curr); }
         iterator& operator++() { ++m_curr; return *this; }
         iterator operator++(int) { iterator tmp = *this; ++* this; return tmp; }
-        bool operator==(iterator const& it) const { return m_curr == it.m_curr; }
         bool operator!=(iterator const& it) const { return m_curr != it.m_curr; }        
     };
 

src/util/chashtable.h

@@ -551,7 +551,6 @@ public:
             return *this;
         }
         iterator operator++(int) { iterator tmp = *this; ++*this; return tmp; }
-        bool operator==(iterator const & it) const { return m_list_it == it.m_list_it; }
         bool operator!=(iterator const & it) const { return m_list_it != it.m_list_it; }
     };
     

src/util/distribution.h

@@ -95,7 +95,6 @@ public:
             next_index();
             return *this;
         }
-        bool operator==(iterator const& other) const { return m_sz == other.m_sz; }
         bool operator!=(iterator const& other) const { return m_sz != other.m_sz; }
     };
 

src/util/dlist.h

@@ -213,13 +213,8 @@ public:
     T const& operator*() const {
         return *m_elem;
     }
-
-    bool operator==(dll_iterator const& other) const {
-        return m_elem == other.m_elem && m_first == other.m_first;
-    }
-
     bool operator!=(dll_iterator const& other) const {
-        return !operator==(other);
+        return m_elem != other.m_elem || m_first != other.m_first;
     }
 };
 

src/util/list.h

@@ -44,7 +44,6 @@ public:
         T const & operator*() const { return m_curr->head(); }
         iterator & operator++() { m_curr = m_curr->tail(); return *this; }
         iterator operator++(int) { iterator tmp = *this; ++*this; return tmp; }
-        bool operator==(iterator const & it) { return m_curr == it.m_curr; }
         bool operator!=(iterator const & it) { return m_curr != it.m_curr; }
     };        
 

src/util/scoped_vector.h

@@ -106,8 +106,7 @@ public:
         unsigned m_index;
     public:
         iterator(scoped_vector const& v, unsigned idx): m_vec(v), m_index(idx) {}
-        
-        bool operator==(iterator const& other) const { return &other.m_vec == &m_vec && other.m_index == m_index; }
+
         bool operator!=(iterator const& other) const { return &other.m_vec != &m_vec || other.m_index != m_index; }
         T const& operator*() { return m_vec[m_index]; }
 

src/util/uint_set.h

@@ -194,7 +194,6 @@ public:
             SASSERT(invariant());
         }
         unsigned operator*() const { return m_index; }
-        bool operator==(iterator const& it) const { return m_index == it.m_index; }
         bool operator!=(iterator const& it) const { return m_index != it.m_index; }
         iterator & operator++() { ++m_index; scan(); return *this; }
         iterator operator++(int) { iterator tmp = *this; ++*this; return tmp; }

src/util/vector.h

@@ -311,9 +311,6 @@ public:
             return *this;
         }
 
-        bool operator==(reverse_iterator const& other) const {
-            return other.v == v;
-        }
         bool operator!=(reverse_iterator const& other) const {
             return other.v != v;
         }
@@ -883,9 +880,6 @@ public:
             return *this;
         }
 
-        bool operator==(reverse_iterator const& other) const {
-            return other.v == v;
-        }
         bool operator!=(reverse_iterator const& other) const {
             return other.v != v;
         }