1 files changed, 9 insertions, 0 deletions
diff --git a/src/lib/buildgraph/rulegraph.h b/src/lib/buildgraph/rulegraph.h
index 510a4789c..39c2eeaba 100644
--- a/src/lib/buildgraph/rulegraph.h
+++ b/src/lib/buildgraph/rulegraph.h
@@ -42,6 +42,12 @@
 namespace qbs {
 namespace Internal {
 
+class RuleGraphVisitor
+{
+public:
+    virtual void visit(const RuleConstPtr &parentRule, const RuleConstPtr &rule) = 0;
+};
+
 class RuleGraph
 {
 public:
@@ -49,6 +55,7 @@ public:
 
     void build(const QSet<RulePtr> &rules, const FileTags &productFileTag);
     QList<RuleConstPtr> topSorted();
+    void accept(RuleGraphVisitor *visitor) const;
 
     void dump() const;
 
@@ -61,6 +68,8 @@ private:
     void removeSiblings(const Rule *rule);
     QList<RuleConstPtr> topSort(const RuleConstPtr &rule, QSet<const Rule *> *seenRules,
             QList<const Rule *> *rulePath);
+    void traverse(RuleGraphVisitor *visitor, const RuleConstPtr &parentRule,
+            const RuleConstPtr &rule) const;
 
 private:
     QMap<FileTag, QList<const Rule*> > m_outputFileTagToRule;