50 struct Stmt {  struct
52   virtual ~Stmt();
63   Stmt();  argument
70 struct RuleStmt : public Stmt {  argument
82 struct AssignStmt : public Stmt {
104 struct CommandStmt : public Stmt {
115 struct IfStmt : public Stmt {
119   vector<Stmt*> true_stmts;
120   vector<Stmt*> false_stmts;
129 struct IncludeStmt : public Stmt {
140 struct ExportStmt : public Stmt {
151 struct ParseErrorStmt : public Stmt {