1 DECLARE_PTR_LIST(expression_stack
, struct expression
);
2 void push_expression(struct expression_stack
**estack
, struct expression
*expr
);
3 struct expression
*pop_expression(struct expression_stack
**estack
);
4 struct expression
*top_expression(struct expression_stack
*estack
);
5 void free_expression_stack(struct expression_stack
**estack
);
