// C# Eval Expression

// Doc: https://eval-expression.net/my-first-compilation

​

// @nuget: Z.Expressions.Eval

​

/*

## Compile a C# expression

​

Our library added syntactic sugar to extend the string type with the `Execute` method. As you can expect, our library also extends the string type with the `Compile` method.

​

There is no difference here between calling `Eval.Compile` and `"the_string_expression".Compile`. Both call the same method under the hood.

​

In this example, we will compile an expression and loop to show only items in our list that currently have a higher value than the current position in our loop.

*/

​

using System;

using System.Collections.Generic;

using System.Diagnostics;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        var list = new List<int>() { 1, 2, 3, 4 };

        var expression = "list.Where(x => x > i)";

        var compiled = expression.Compile<Func<List<int>, int, List<int>>>("list", "i");

        // SIMILAR TO: var compiled = Eval.Compile<Func<List<int>, int, List<int>>>(expression, "list", "i");       

        for(int i = 0; i < 4; i++)

        {

            var rList = compiled(list, i);

            FiddleHelper.WriteTable("i=" + i, rList);

        }       

    }

}