1 files changed, 27 insertions, 2 deletions
diff --git a/staptree.h b/staptree.h
index 16f0256a..146d0e34 100644
--- a/staptree.h
+++ b/staptree.h
@@ -58,6 +58,7 @@ std::ostream& operator << (std::ostream& o, const exp_type& e);
 
 struct token;
 struct visitor;
+struct update_visitor;
 
 struct expression
 {
@@ -227,18 +228,42 @@ struct target_symbol: public symbol
   enum component_type
     {
       comp_struct_member,
-      comp_literal_array_index
+      comp_literal_array_index,
+      comp_expression_array_index,
     };
+
+  struct component
+    {
+      const token* tok;
+      component_type type;
+      std::string member; // comp_struct_member
+      int64_t num_index; // comp_literal_array_index
+      expression* expr_index; // comp_expression_array_index
+
+      component(const token* t, const std::string& m):
+        tok(t), type(comp_struct_member), member(m) {}
+      component(const token* t, int64_t n):
+        tok(t), type(comp_literal_array_index), num_index(n) {}
+      component(const token* t, expression* e):
+        tok(t), type(comp_expression_array_index), expr_index(e) {}
+      void print (std::ostream& o) const;
+    };
+
   bool addressof;
   std::string base_name;
-  std::vector<std::pair<component_type, std::string> > components;
+  std::vector<component> components;
   std::string probe_context_var;
   semantic_error* saved_conversion_error;
   target_symbol(): addressof(false), saved_conversion_error (0) {}
   void print (std::ostream& o) const;
   void visit (visitor* u);
+  void visit_components (visitor* u);
+  void visit_components (update_visitor* u);
+  void assert_no_components(const std::string& tapset);
 };
 
+std::ostream& operator << (std::ostream& o, const target_symbol::component& c);
+
 
 struct cast_op: public target_symbol
 {