// C# Eval Expression

// Doc: https://eval-expression.net/eval-compile

​

// @nuget: Z.Expressions.Eval

​

/*

# How to use the Compile Method?

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The `Compile` method allows you to compile any C# code or expression at runtime and return a delegate.

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The `Compile` method offers the best performance when you need to execute the same expression multiple times but with different parameters:

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The `Compile` method is slightly harder at first to understand than the [Execute](eval-execute) method. However, the `Compile` method offers the best performance as you directly use the delegate (compiled method).

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See more: https://eval-expression.net/eval-compile

*/

​

using System;

using System.Collections.Generic;

using Z.Expressions;

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public class Program

{

    public static void Main()

    {

        var fizzBuzzCompiled = Eval.Compile<Func<int, string>>(@"

if (i % 15 == 0)

    return $'{i} => FizzBuzz';

else if (i % 3 == 0)

    return $'{i} => Fizz';

else if (i % 5 == 0)

    return $'{i} => Buzz';

else

    return $'{i} => {i}';

", "i");

        var answers = new List<string>();

        for(int i = 0; i <= 100; i++)

        {

            answers.Add(fizzBuzzCompiled(i));

        }

​

        Console.WriteLine(string.Join(Environment.NewLine, answers));

    }

}

​

​