Dynamic Expresso

• Available platforms: .NET Core 2.0, .NET 4.5, .NET 4.6.1

1. Dynamic Expresso is an interpreter for simple C# statements written in .NET Standard 2.0. Dynamic Expresso embeds its own parsing logic, really interprets C# statements by converting it to .NET lambda expressions or delegates.
2. Using Dynamic Expresso developers can create scriptable applications, execute .NET code without compilation or create dynamic linq statements.
3. Statements are written using a subset of C# language specifications. Global variables or parameters can be injected and used inside expressions. It doesn't generate assembly but it creates an expression tree on the fly.

Git地址

https://github.com/davideicardi/DynamicExpresso

public class Program
    {
        private static Interpreter _target;
        static void Main(string[] args)
        {
            _target = new Interpreter();

            //返回指定数字的指定次幂
            Func pow = (x, y) => Math.Pow(x, y);
            //开平方根
            Func sqrt = (x) => Math.Sqrt(x);
            //最大值
            Func max = (x, y) => Math.Max(x, y);
            //最小指
            Func min = (x, y) => Math.Min(x, y);

            _target.SetFunction("pow", pow);
            _target.SetFunction("sqrt", sqrt);
            _target.SetFunction("max", max);
            _target.SetFunction("min", min);

            Console.WriteLine(_target.Eval("pow(3, 2)"));
            Console.WriteLine(_target.Eval("sqrt(9)"));
            Console.WriteLine(_target.Eval("max(3, 2)"));
            Console.WriteLine(_target.Eval("min(3, 2)"));

            //打印普通数学表达式计算的值
            string expression = "10/2+5+(10+5)*6-40";
            Console.WriteLine(_target.Eval(expression));
        }
    }

测试结果如下：

测试结果.png