// C# Eval Expression

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

​

// @nuget: Z.Expressions.Eval

​

/*

## LastCompiledExpression

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The LastCompiledExpression option lets you to get the expression that was used in the last compilation. This option is not thread safe, so it should always be used in a new instance of an eval context if your application is multi-threaded.

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In this example, we will compile a basic C# statement and explore the expression that was compiled.

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

*/

​

using System;

using System.Collections.Generic;

using System.Linq.Expressions;

using System.Reflection;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        // Global Context: var lastCompiledExpression = EvalManager.DefaultContext.LastCompiledExpression;

        var context = new EvalContext();

        var compiled = context.Compile<Func<int, int, int>>("X + Y", "X", "Y");

        var lastExpression = context.LastCompiledExpression;

        Console.WriteLine($"Root NodeType: {lastExpression.NodeType};");

        Console.WriteLine($"Left NodeType: {((BinaryExpression)lastExpression).Left.NodeType}");

        Console.WriteLine($"Right NodeType: {((BinaryExpression)lastExpression).Right.NodeType}");

    }

}