Example: typemeta_TEnumType

C++ example source code:

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2025, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */
#include <mrpt/typemeta/TEnumType.h>

#include <iostream>
#include <string>

// Example declaration of "enum class"
enum class TestColors
{
  Black = 0,
  Gray = 7,
  White = 15
};

MRPT_ENUM_TYPE_BEGIN(TestColors)
MRPT_FILL_ENUM_MEMBER(TestColors, Black);
MRPT_FILL_ENUM_MEMBER(TestColors, Gray);
MRPT_FILL_ENUM_MEMBER(TestColors, White);
MRPT_ENUM_TYPE_END()

// Example declaration of plain enum
enum Directions
{
  North,
  East,
  South,
  West
};
// Example declaration of "enum class"
MRPT_ENUM_TYPE_BEGIN(Directions)
MRPT_FILL_ENUM(North);
MRPT_FILL_ENUM(East);
MRPT_FILL_ENUM(South);
MRPT_FILL_ENUM(West);
MRPT_ENUM_TYPE_END()

void Test_EnumType()
{
  using namespace std;
  using namespace mrpt::typemeta;

  cout << "White => " << (int)TEnumType<TestColors>::name2value("White") << endl;
  cout << "Black => " << (int)TEnumType<TestColors>::name2value("Black") << endl;
  cout << "Gray  => " << (int)TEnumType<TestColors>::name2value("Gray") << endl;

  cout << "7    <= " << TEnumType<TestColors>::value2name(TestColors(7)) << endl;
}

int main(int argc, char** argv)
{
  try
  {
    Test_EnumType();
    return 0;
  }
  catch (const std::exception& e)
  {
    std::cerr << "MRPT error: " << e.what() << std::endl;
    return -1;
  }
}