// C# Eval Expression

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

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// @nuget: Z.Expressions.Eval

​

/*

## MemoryCacheEntryOptionsFactory

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The MemoryCacheEntryOptionsFactory option lets you get or set for .NET 5+ and .NET Core the cache entry options to use when caching the delegate returned from the compile method. By default, the MemoryCacheEntryOptionsFactory value is `new MemoryCacheEntryOptions() { Size = 1 };`.

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In this example, we will set a new MemoryCacheEntryOptionsFactory that will set a `SlidingExpiration` to only cache a compile delegate 5 minutes.

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

*/

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using System;

using Microsoft.Extensions.Caching.Memory;

using Z.Expressions;

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public class Program

{

    public static void Main()

    {

        // Global Context: EvalManager.DefaultContext.MemoryCacheEntryOptionsFactory = () => new MemoryCacheEntryOptions() { Size = 1, SlidingExpiration = TimeSpan.FromMinutes(5) };

        var context = new EvalContext();

        context.MemoryCacheEntryOptionsFactory = () => new MemoryCacheEntryOptions() { Size = 1, SlidingExpiration = TimeSpan.FromMinutes(5) };

        Console.WriteLine("1 - Result: " + context.Execute("1 + 2"));

    }

}