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

union Value {
    int   as_int;
    char* as_string;
};
// A union object can contain only one of the fields --- not all.
// They share the same space.
//
// A union  object occupies ≥ the MAX of the size of each of its fields.
// A struct object occupies ≥ the SUM of the size of each of its fields.
//                                ▲▲▲

int main(int argc, char* argv[]) {
    union Value v = { .as_int = 5 };
    log_int( v.as_int );

    v.as_int = 7;
    log_int( v.as_int );

    v.as_string = "apple";
    log_str( v.as_string );
    
    log_int( v.as_int );  // BAD!!!  The char* overwrote the int that was there before.

    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */