cxx: Fix some warnings from -Wextra

Summary:
- As we don't have C++17's [[fallthrough]], rely on GCC'd detection
  of fallthrough comments.

See https://developers.redhat.com/blog/2017/03/10/wimplicit-fallthrough-in-gcc-7/

- Add some missing copy assignment operators as reported by
  -Wdeprecated-copy

- Cast a Eina_Bool/bool narrowing conversion

Reviewers: zmike, brunobelo, felipealmeida

Reviewed By: zmike

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D9934

src/bindings/cxx/eina_cxx/eina_inlist.hh

@@ -107,6 +107,21 @@ struct _inlist_iterator
   _inlist_iterator(_inlist_iterator<typename std::remove_const<T>::type> const& other)
     : _list(other._list), _node(other._node) {}
 
+  /**
+   * @brief Copy assignment operator.
+   * @param other Other iterator being copied
+   * @return Copy of the iterator
+   */
+  _inlist_iterator<T> & operator=(_inlist_iterator<typename std::remove_const<T>::type> const& other)
+  {
+    if (this != &other)
+      {
+          _list = other._list;
+          _node = other._node;
+      }
+    return *this;
+  }
+
   /**
    * @brief Move the iterator to the next position in the list.
    * @return The iterator itself.

src/bindings/cxx/eina_cxx/eina_ptrarray.hh

@@ -50,6 +50,12 @@ struct _ptr_array_iterator
     : _ptr(other._ptr)
   {
   }
+  _ptr_array_iterator<T>& operator=(_ptr_array_iterator<typename remove_cv<value_type>::type> const& other)
+  {
+    if (this != &other)
+      _ptr = other._ptr;
+    return *this;
+  }
   _ptr_array_iterator<T>& operator++()
   {
     ++_ptr;

src/bindings/cxx/eina_cxx/eina_ptrlist.hh

@@ -67,6 +67,13 @@ struct _ptr_list_iterator : _ptr_list_iterator_base
   {
   }
 
+  _ptr_list_iterator<value_type>& operator=(_ptr_list_iterator<value_type> const &other)
+  {
+    if (this != &other)
+      _ptr_list_iterator_base::operator=(other);
+    return *this;
+  }
+
   _ptr_list_iterator<T>& operator++()
   {
     _node = eina_list_next(_node);

src/lib/eolian_cxx/grammar/html_escaped_string.hpp

@@ -26,7 +26,8 @@ struct html_escaped_string_generator
                case '\'': out.append("'"); break;
                case '<':  out.append("&lt;"); break;
                case '>':  out.append("&gt;"); break;
-               case '\\': if (pos < input.size() - 1) pos++; // Deliberate fallthrough
+               case '\\': if (pos < input.size() - 1) pos++;
+                    // fall through
                default:   out.append(&input[pos], 1); break;
             }
         }

src/lib/eolian_cxx/grammar/klass_def.hpp

@@ -492,7 +492,7 @@ inline void type_def::set(Eolian_Type const* eolian_type, Eolian_Unit const* uni
                 complex.subtypes.push_back({stp
                                             , unit
                                             , ::eolian_type_c_type_get(stp)
-                                            , eolian_type_is_move(stp)
+                                            , (bool)eolian_type_is_move(stp)
                                             , is_by::value});
                 stp = eolian_type_next_type_get(stp);
              }