1 files changed, 18 insertions, 4 deletions
diff --git a/flowgraph/graph.h b/flowgraph/graph.h
index 265a3bd..15c6aef 100644
--- a/flowgraph/graph.h
+++ b/flowgraph/graph.h
@@ -2,18 +2,32 @@
 
 #include "node.h"
 
+#include <deque>
 #include <exception>
 #include <memory>
-#include <string>
 #include <stdexcept>
-#include <vector>
 
 namespace FlowGraph {
 
- class Graph: public std::vector<std::shared_ptr<Node>>
+ class Graph: public std::deque<std::shared_ptr<Node>>
  {
  public:
-  Graph() {}
+  Graph();
+  Graph(const std::deque<std::shared_ptr<Node>>& nodes);
+  Graph(const Graph& other) = default;
+  ~Graph();
+
+  Graph& operator= (const Graph&) = default;
+
+  // returns the outermost scope inside this graph
+  LocalScope& scope() const;
+
+  // append other graph by joining the respective outermost scopes
+  void append(const Graph& other);
+  
+  void append(std::shared_ptr<Node> node);
+
+  std::shared_ptr<Node> lastOp() const;
  };
 
 }