#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

// NAÏVE WAY - do not do it like this
//
// Wastes lots of space, and we don't know what kind of data a given
// node contains.

// Use typedef syntax

typedef struct {
    int    as_int;
    char*  as_string;
    struct Node* as_list;
    enum NodeType { NODE_INT, NODE_STRING, NODE_LIST } type;  // best
} Element;

// Type is now known as «Element» instead of «struct Element»

typedef struct _Node {
    struct _Node*   next;
    Element value;
} Node;

// Type is now known as «Node» instead of «struct Node»

/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */