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

// BETTER WAY #5:  Anonymous union

struct ValueWithType {
    union Value {
        int   as_int;
        char* as_string;
    };  // no field name for the union inside.  ANONYMOUS UNION
    // } value;   // .value field of the struct type
    enum ValueType {
        TYPE_INT,
        TYPE_STRING
    } type;    // .type field of the struct type
};

// void print_element(union Value value, enum ValueType type_of_value) {
void print_element(struct ValueWithType value_with_type) {
    if(value_with_type.type == TYPE_INT) {
        printf("value is %d\n", value_with_type.as_int);
    }
    else {
        printf("value is %s\n", value_with_type.as_string);
    }
}

int main(int argc, char* argv[]) {
    //union Value value = { .as_int = 5 };
    //enum ValueType type_of_value = TYPE_INT;
    //struct ValueWithType value_with_type = { .value = value, .type = type_of_value };

    struct ValueWithType value_with_type = { .as_int = 5, .type = TYPE_INT };

    value_with_type.as_int = 7;
    print_element(value_with_type);  // <<<< REWARD <<<<

    value_with_type.as_string = "apple";
    value_with_type.type = TYPE_STRING;
    print_element(value_with_type);
    
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */