#ifndef ENV_H
#define ENV_H

// #include "value.h"
typedef struct value * value_t;

#include "hashtable.h"

typedef struct symbol_table *env_t;
#define ENV_EMPTY NULL

typedef void (*env_destroy_func)(char *key, value_t value);

struct symbol_table {
    hashtable_t table;

    struct symbol_table *parent;
    size_t refs;

    env_destroy_func destroy_func;
};

env_t env_create(env_t parent, env_destroy_func destroy_func);
void env_destroy(env_t env);

int env_insert(env_t env, value_t key, value_t data);
int env_query (env_t env, value_t key, value_t *data);
int env_delete(env_t env, value_t key);

#endif