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#ifndef BDL_ENVIRONMENT_H
#define BDL_ENVIRONMENT_H
#include "objects.h"
typedef struct EnvEntry {
Object *symbol;
Object *value;
} EnvEntry;
typedef struct Environment {
struct Environment *parent;
EnvEntry *entries;
bool marked;
} Environment;
Environment * env_create(Environment *parent);
void env_add_symbol(Environment *env, Object *symbol, Object *value);
Object * env_lookup(Environment *env, Object *symbol);
Object * env_update(Environment *env, Object *symbol, Object *value);
ssize_t env_index_current(Environment *env, Object *symbol);
void env_add_or_update_current(Environment *env, Object *symbol, Object *value);
Environment * env_extend(Environment *parent, Environment *extra);
#define MAKE_ENV_VAR(ENV,STR,VAR) \
(env_add_symbol((ENV), MAKE_SYM(STR), (VAR)))
#define MAKE_ENV_PROC(ENV,STR,FUN) \
(env_add_symbol((ENV), MAKE_SYM(STR), make_procedure(FUN)))
#define ENV_BUF_CAP 8
#endif // BDL_ENVIRONMENT_H
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