From 7804b57632e3e4eb57971f2a95fa873ef11866ea Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Sat, 8 May 2004 19:34:06 +0000
Subject: Added default iterator constructor, for convenience

svn-id: r13808
---
 common/list.h | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'common')

diff --git a/common/list.h b/common/list.h
index b21bc5e862..2e8403c9dc 100644
--- a/common/list.h
+++ b/common/list.h
@@ -50,31 +50,37 @@ protected:
 	struct Iterator {
 		NodeBase *_node;
 		
+		Iterator<T2>() : _node(0) {}
 		Iterator<T2>(NodeBase *node) : _node(node) {}
 
 		// Prefix inc
 		Iterator<T2> &operator++() {
-			_node = _node->_next;
+			if (_node)
+				_node = _node->_next;
 			return *this;
 		}
 		// Postfix inc
 		Iterator<T2> operator++(int) {
 			Iterator<T2> tmp = *this;
-			_node = _node->_next;
+			if (_node)
+				_node = _node->_next;
 			return tmp;
 		}
 		// Prefix dec
 		Iterator<T2> &operator--() {
-			_node = _node->_prev;
+			if (_node)
+				_node = _node->_prev;
 			return *this;
 		}
 		// Postfix dec
 		Iterator<T2> operator--(int) {
 			Iterator<T2> tmp = *this;
-			_node = _node->_prev;
+			if (_node)
+				_node = _node->_prev;
 			return tmp;
 		}
 		T2& operator*() const {
+			assert(_node);
 			return static_cast<Node<T2>*>(_node)->_data;
 		}
 		T2* operator->() const {
-- 
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