added erase

include/const_list.h

@@ -353,6 +353,40 @@ namespace cc {
 		return it;
 	}
 
+	template<typename Node>
+	constexpr const_list<Node>::iterator const_list<Node>::erase(const_list::const_iterator pos)
+	{
+		auto it = pos._const_cast();
+		auto next = std::next(it);
+		
+		it->unlink();
+		--_size;
+		
+		return next;
+	}
+
+	template<typename Node>
+	constexpr const_list<Node>::iterator const_list<Node>::erase(const_list::const_iterator first, const_list::const_iterator last)
+	{
+		auto nc_last = last._const_cast();
+		
+		if (first == last) {
+			return nc_last;
+		}
+		
+		auto next = (last == end() ? end() : std::next(nc_last));
+		for (auto it = first._const_cast()._node; it != next._node; ) {
+			auto n = it->_next;
+			
+			it->unlink();
+			--_size;
+			
+			it = n;
+		}
+		
+		return next;
+	}
+
 	template<typename D>
 	constexpr const_list_node<D>::const_list_node(const const_list_node &other) noexcept
 		:	_delete_cb(other._delete_cb)