#include <stdlib.h>

#include <gc/linked_list/struct.h>

#include "kind.h"

#include "list/struct.h"
#include "null/struct.h"
#include "boolean/struct.h"
#include "identifier/struct.h"
#include "integer/struct.h"
#include "quote/struct.h"
#include "user_lambda/struct.h"
#include "builtin_lambda/struct.h"
#include "environment/struct.h"

struct value_inheritance;

struct value
{
    struct link internally_referenced, reaped, grey, white, externally_referenced;
    size_t external_refcount;
    // size_t garbage_collection_count;
        // no need to initalize or maintain, entirely handled by GC.
    
    const struct value_inheritance* inheritance;
    
    enum value_kind kind;
    
    union
    {
        struct null_value null;
        
        struct boolean_value boolean;
        
        struct identifier_value identifier;
        
        struct integer_value integer;
        
        struct quote_value quote;
        
        struct list_value list;
        
        struct user_lambda_value user_lambda;
        
        struct builtin_lambda_value builtin_lambda;
        
        struct environment_value environment;
    } subclass;
};