.NET-like Reflection Support for Enums in C++

#include <iostream>
#include <string>

// Compile:
// vcvars32.bat
// cl /W4 /WX /EHsc Reflect4CppEnum_demo.cpp
using namespace std;

#include "Reflection4CppEnum.hpp"
#include "Reflection4CppEnum_demo.h"

DEF_ENUM_2(, WeekDay, ALL_THE_WEEK);

void demo2()
{
    // Name and How many enumerators defined for WeekDay:
    // .NET equivlent: typeof(WeekDay).Name       Enum.GetNames(typeof(WeekDay)).Length
    printf("%d enumerators defined for Enum [%s]\n", EnumHelper<WeekDay>::count(), 
	    EnumHelper<WeekDay>::get_type_name() );

    // Iterate all the names and corresponding Values
    // .NET equivlent:
    //      foreach(string s in Enum.GetNames(typeof(WeekDay))) Console.WriteLine( s );
    //      foreach(object o in Enum.GetValues(typeof(WeekDay))) Console.WriteLine( o );
    EnumHelper<WeekDay>::const_str_iterator it_str = EnumHelper<WeekDay>::str_begin();
    EnumHelper<WeekDay>::const_value_iterator it_val = EnumHelper<WeekDay>::value_begin();

    for(; it_str != EnumHelper<WeekDay>::str_end() && it_val != EnumHelper<WeekDay>::value_end();
	    ++it_str, ++it_val)
    {
	printf("Enum str: [%20s],  value: %d\n", *it_str, *it_val);
    }

    // Determine whether an integer value is a defined enumerator:
    // .NET equivlent:
    //     Console.WriteLine(  Enum.IsDefined(typeof(WeekDay), 0) );
    int test_enum_val = 0;
    printf("Is %d a defined enumerator for %s: %s\n", test_enum_val,  EnumHelper<WeekDay>::get_type_name(),
	    EnumHelper<WeekDay>::is_defined(test_enum_val)? "True" : "False" );

    // Determine whether a string value is a defined enumerator:
    // .NET equivlent:
    //     Console.WriteLine(  Enum.IsDefined(typeof(WeekDay), "Sunday" ) );
    const char * test_enum_str = "Sunday";
    printf("Is %s a defined enumerator for %s: %s(case-sensitive)\n", test_enum_str,
	    EnumHelper<WeekDay>::get_type_name(), 
	    EnumHelper<WeekDay>::is_defined(test_enum_str) ? "True": "False" );

    // Support case-insenstive is_defined
    // .NET equivlent: No
    test_enum_str = "sunday";
    printf("Is %s a defined enumerator for %s: %s(case-insensitive)\n", test_enum_str,
	    EnumHelper<WeekDay>::get_type_name(), 
	    EnumHelper<WeekDay>::is_defined(test_enum_str, true) ? "True": "False" );

    // From enumerator to string
    // .NET equivlent: 
    //     WeekDay day = Sunday; Console.WriteLine( day.ToString() );
    printf("enum string for %d is %s\n",  test_enum_val, EnumHelper<WeekDay>::to_string(
		static_cast<WeekDay>(test_enum_val)) );
    printf("enum string for %d is %s\n",  Sunday, EnumHelper<WeekDay>::to_string( Sunday ) );
    //     for a non-exist item, get NULL
    printf("enum string for %d is %s\n",  104, EnumHelper<WeekDay>::to_string( 
		static_cast<WeekDay>(104) ) );

    // From string to enumerator:
    // .NET equivlent: 
    //     WeekDay day = Enum.Parse( typeof(WeekDay), "Sunday");
    printf("enum value for %s is %d(case-insensitive)\n",  test_enum_str,
	    EnumHelper<WeekDay>::parse( test_enum_str, true ) );
    try {
	EnumHelper<WeekDay>::parse( test_enum_str, false );
    } catch( runtime_error & e)
    {
	fprintf(stderr, "exception: %s\n", e.what() );
    }
    test_enum_str = "Sunday";
    printf("enum value for %s is %d(case-sensitive)\n",  test_enum_str,
	    EnumHelper<WeekDay>::parse( test_enum_str) );

    // Find the index for an enumerator value
    // .NET equivlent: No
    printf("enum value %d is the %d-th item in the declaration order\n", 0, EnumHelper<WeekDay>::index_of(0) );
    //     return -1 for the non exist value
    printf("enum value %d is the %d-th item in the declaration order\n", 104, EnumHelper<WeekDay>::index_of(104) );

    // Find the index for an enumerator string
    // .NET equivlent: No
    printf("enum string [%s] is the %d-th item in the declaration order\n", test_enum_str,
	    EnumHelper<WeekDay>::index_of(test_enum_str) );
    //     return -1 for the non exist strings:
    test_enum_str = "not exist";
    printf("enum string [%s] is the %d-th item in the declaration order\n", test_enum_str,
	    EnumHelper<WeekDay>::index_of(test_enum_str) );

	ColorSpace::Image::print_colors();
}