1 files changed, 14 insertions, 0 deletions
diff --git a/symtab.h b/symtab.h
index 9d8a120..d1de4e1 100644
--- a/symtab.h
+++ b/symtab.h
@@ -25,6 +25,7 @@ using namespace std;
 extern vector<string*>* g_symbols;
 
 class Symtab;
+class Var;
 
 class Symbol {
  public:
@@ -54,6 +55,9 @@ class Symbol {
 
   bool IsValid() const { return v_ >= 0; }
 
+  Var* GetGlobalVar() const;
+  void SetGlobalVar(Var* v) const;
+
  private:
   explicit Symbol(int v);
 
@@ -62,6 +66,16 @@ class Symbol {
   friend class Symtab;
 };
 
+class ScopedGlobalVar {
+ public:
+  ScopedGlobalVar(Symbol name, Var* var);
+  ~ScopedGlobalVar();
+
+ private:
+  Symbol name_;
+  Var* orig_;
+};
+
 inline bool operator==(const Symbol& x, const Symbol& y) {
   return x.val() == y.val();
 }