1 files changed, 18 insertions, 0 deletions
diff --git a/src/pkg/go/ast/ast.go b/src/pkg/go/ast/ast.go
index 4b90f3b74..efe2af459 100644
--- a/src/pkg/go/ast/ast.go
+++ b/src/pkg/go/ast/ast.go
@@ -596,6 +596,7 @@ func (s *RangeStmt) stmtNode() {}
 type (
 	// The Spec type stands for any of *ImportSpec, *ValueSpec, and *TypeSpec.
 	Spec	interface {
+		Node;
 		specNode();
 	};
 
@@ -627,6 +628,23 @@ type (
 )
 
 
+// Pos() implementations for spec nodes.
+//
+func (s *ImportSpec) Pos() token.Position {
+	if s.Name != nil {
+		return s.Name.Pos();
+	}
+	return s.Path[0].Pos();
+}
+
+func (s *ValueSpec) Pos() token.Position {
+	return s.Names[0].Pos();
+}
+func (s *TypeSpec) Pos() token.Position {
+	return s.Name.Pos();
+}
+
+
 // specNode() ensures that only spec nodes can be
 // assigned to a Spec.
 //