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#ifndef VISITOR_H
#define VISITOR_H
#include "./ast.h"
#include "./hash_table.h"
#include "./stack.h"
typedef struct {
hash_table_t *symbol_table;
stack_t *stack_frame;
ast_t *root;
} visitor_t;
void eval_error(visitor_t *v, ast_t *e);
visitor_t *init_visitor(ast_t *root);
bool is_self_evaluating(ast_t *e);
ast_t *eval_symbol(visitor_t *v, ast_t *e);
ast_t *eval_list(visitor_t *v, ast_t *e);
ast_t *eval_expr(visitor_t *v, ast_t *e);
ast_t *eval(visitor_t *v);
#endif
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