#ifndef ENV_H
#define ENV_H

#include "datum.h"

typedef struct mapping {
    const char *variable;
    datum *value;
    struct mapping *next;
} mapping;

typedef struct environment {
    struct mapping *first_mapping;
    struct environment *outer_env;
} environment;

datum* define_variable(const char *var, datum *value, environment *env);
datum* lookup_variable_value(char* c, environment* e);
datum* make_compiled_proc(void* entry, environment* e);
environment* extend_environment(const char **args, datum *argl, environment* env);
environment* get_global_environment(void);
mapping* new_mapping(const char* var, datum* value);

#endif