using System;

​

using KGySoft;

using KGySoft.CoreLibraries;

using KGySoft.Diagnostics;

public enum SimpleEnum

{

    Zero,

    One,

    Two,

    Three

}

​

[Flags]

public enum FlagsEnum

{

    None,

    Flag0 = 1,

    Flag1 = 1 << 1,

    Flag2 = 1 << 2,

}

​

public class Program

{

    public static void Example1<TEnum>(TEnum simpleEnum)

        where TEnum : struct, Enum

    {

        if (!simpleEnum.IsDefined())

            // Enum instance of 'SimpleEnum' type must be one of the defined values.

            throw new ArgumentOutOfRangeException(PublicResources.EnumOutOfRange(simpleEnum));

        // do whatever

        Console.WriteLine(simpleEnum);

    }

    public static void Example2<TEnum>(TEnum flagsEnum)

        where TEnum : struct, Enum

    {

        if (!flagsEnum.AllFlagsDefined())

            // Eg: Enum instance of 'FlagsEnum' type must consist of the defined flags.

            throw new ArgumentOutOfRangeException(PublicResources.FlagsEnumOutOfRange(flagsEnum));

        // do whatever

        Console.WriteLine(flagsEnum);

    }

    public static void Main()

    {   

        // functionality test

        Example1(SimpleEnum.One);

        Example2(FlagsEnum.Flag1 | FlagsEnum.Flag2);

        // performance test

        Console.WriteLine();

        new PerformanceTest<object>

            {

                TestTime = 200, // Using a very short warm-up time just for .NET Fiddle

                Iterations = 1_000_000

            }

            .AddCase(() => Enum.IsDefined(SimpleEnum.One), "System.Enum.IsDefined")

            .AddCase(() => SimpleEnum.One.IsDefined(), "KGySoft IsDefined extension")

            .DoTest()

            .DumpResults(Console.Out);

    }

​

}

​