takiru / Metroit.JustEvaluate

Dynamically assemble formulas and run JustEvaluate.

Metroit.JustEvaluate

Dynamically assemble formulas and run JustEvaluate.
Assemble expressions with instructions and execute them.
Works with .NETStandard 2.0 or .NETStandard2.1.

JustEvaluate is used.

Support operator

operator
- * + -

Not Support

• Operator

operator
> < <= >= = <> & |

• User-Defined Functions

How to use

    internal class Program
    {
        static void Main(string[] args)
        {
            var c = new CalcExpression();
            c.Add(new StartBracketItem());
            c.Add(new ParameterItem("Param1", "Display1"));
            c.Add(new PlusItem());
            c.Add(new ValueItem(100));
            c.Add(new EndBracketItem());
            c.Add(new MultiplyItem());
            c.Add(new ParameterItem("Param2", "Display2"));
            c.Add(new MinusItem());
            c.Add(new HogeItem());

            c.Parameters["Param1"].Value = 50;
            c.Parameters["Param2"].Value = 2;
            c.Parameters["Hoge"].Value = 10;

            var r = c.Evaluate();                   // (50 + 100) * 2 - 10
            Console.WriteLine(c.Formula);           // (Param1+100)*Param2-Hoge
            Console.WriteLine(c.DisplayFormula);    // (Display1+100)*Display2-DisplayHoge
            Console.WriteLine(r);                   // 290
            

            var json = CalcConvert.Serialize(c);

            // {"Items":[{"Type":"StartBracketItem"},{"Name":"Param1","DisplayName":"Display1","Type":"ParameterItem"},{"Type":"PlusItem"},{"Type":"ValueItem","Value":100.0},{"Type":"EndBracketItem"},{"Type":"MultiplyItem"},{"Name":"Param2","DisplayName":"Display2","Type":"ParameterItem"},{"Type":"MinusItem"},{"Type":"ConsoleApp1.HogeItem, ConsoleApp1"}]}
            Console.WriteLine(json);

            c = CalcConvert.Deserialize(json);

            Console.ReadLine();
        }
    }

    internal class HogeItem : SlimParameterItemBase
    {
        public HogeItem() : base("Hoge", "DisplayHoge")
        {
        }
    }