// This code is in the public domain.
// Author: Walt Karas

// Example usage of enum.hpp .

#include "enum.hpp"

// Define enum Color with element Color_red, Color_green, Color_blue,
// Color_yellow .

#define COLOR_LIST(E, S) \
E(Color_red) S E(Color_green) S E(Color_blue) S E(Color_yellow)

ENUM_DEFINE(Color, COLOR_LIST)

// Define a lookup Color -> const char * color string name.

#define COLOR_STR_LIST(E, S) \
E(Color_blue, "Blue") S \
E(Color_green, "Green") S \
E(Color_yellow, "Yellow") S \
E(Color_red, "Red")

ENUM_LOOKUP(Color, COLOR_LIST, Color_str, char *, COLOR_STR_LIST)

// Define a lookup Color -> unsigned color "weight".

#define COLOR_WEIGHT_LIST(E, S) \
E(Color_blue, 5) S \
E(Color_green, 10) S \
E(Color_yellow, 15) S \
E(Color_red, 20)

ENUM_LOOKUP(Color, COLOR_LIST, Weight, unsigned, COLOR_WEIGHT_LIST)

// Use the COLOR_WEIGHT_LIST format to calculate (at compile time)
// the total of all color weights.

#define JUST_WEIGHT(C, W) (W)

const unsigned Total_weight = COLOR_WEIGHT_LIST(JUST_WEIGHT, +);

// Trivial example usage of these definitions.

#include <cstdio>

int main(void)
  {
    std::printf(
      "%d %s %u %u\n", Color_yellow, Color_str[Color_yellow],
      Weight[Color_yellow], Total_weight);

    return(0);
  }