// C# Eval Expression

// Doc: https://eval-expression.net/register-unregister

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// @nuget: Z.Expressions.Eval

​

/*

## RegisterStaticMethod

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The RegisterStaticMethod method registers all static methods from the types or fields list provided.

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In this example, we will register all static methods of the type `Program` with the method `RegisterStaticMethod` and then use it in our expressions. Then we will demonstrate how to use the method `IsRegisteredStaticMethod` and `UnregisterStaticMethod` to check if all statics methods are currently registered and to unregister them.

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See more: https://eval-expression.net/register-unregister

*/

​

using System;

using Z.Expressions;

​

public class Program

{

    public static void Main()

    {

        // Global Context: EvalManager.DefaultContext.RegisterStaticMethod(typeof(Program));

        var context = new EvalContext();

        context.RegisterStaticMethod(typeof(Program));      

        var r1 = context.Execute<int>("MyStaticMethod() + 100"); // return 103

        Console.WriteLine("1 - Result: " + r1);

        // Check if all static methods of the type `Program` is registered

        var r2 = context.IsRegisteredStaticMethod(typeof(Program)); // return true

        Console.WriteLine("2 - Result: " + r2);

        // Unregister all static methods of the type `Program`

        context.UnregisterStaticMethod(typeof(Program));

        // Check if all static methods of the type `Program` has been succesfully unregistered

        var r3 = context.IsRegisteredStaticMethod(typeof(Program)); // return false

        Console.WriteLine("3 - Result: " + r3);

    }

    public static int MyStaticMethod()

    {

        return 3;

    }

}