X-Git-Url: https://ruin.nu/git/?p=popboot.git;a=blobdiff_plain;f=node.cpp;h=1fb2b2e3ee9448eeb50a7f0657e23f1082f72895;hp=dbb099cf47bc5c30fe14b03fe83aad6cd5d53ca9;hb=e26fd7b3195576b25ffe51253a391b53f412a650;hpb=3a5c7967d474fe42d471f417fa1f4bb1aec8e4fa

diff --git a/node.cpp b/node.cpp
index dbb099c..1fb2b2e 100644
--- a/node.cpp
+++ b/node.cpp
@@ -7,7 +7,7 @@ Node::Node(Action action){
 	_preconditions = _action.preconditions();
 }
 
-Action Node::action(){
+const Action& Node::action() const{
 	return _action;
 }
 
@@ -17,8 +17,8 @@ void Node::addChild(Node* node){
 }
 
 
-void Node::execute(literals effects){
-	for (literals::iterator effect = effects.begin(); effect != effects.end(); ++effect){
+void Node::execute(const literals& effects){
+	for (literals::const_iterator effect = effects.begin(); effect != effects.end(); ++effect){
 		_preconditions.erase(find(_preconditions.begin(),_preconditions.end(), *effect));
 	}
 	if (_preconditions.size() != 0)