Added ExpressionString property to coreExpression

InABox.Core/CoreExpression.cs

@@ -75,7 +75,8 @@ namespace InABox.Core
     {
         private Expression Expression;
         
-        public bool IsValid {
+        public bool IsValid
+        {
             get
             {
                 try
@@ -89,6 +90,8 @@ namespace InABox.Core
             }
         }
 
+        public string ExpressionString { get; set; }
+
         public IReadOnlyCollection<string> ReferencedVariables => Expression.ReferencedVariables;
 
         protected virtual Type? ReturnType { get; }
@@ -96,6 +99,7 @@ namespace InABox.Core
         public CoreExpression(string expressionString, Type? returnType = null)
         {
             Expression = new Expression(expressionString, _context);
+            ExpressionString = expressionString;
             ReturnType = returnType;
             if (!IsValid)
             {
@@ -127,6 +131,17 @@ namespace InABox.Core
             }
             return result;
         }
+
+        [return: MaybeNull]
+        public T Evaluate<T>(IVariableProvider provider)
+        {
+            var result = Evaluate(provider);
+            if(result is T ret)
+            {
+                return ret;
+            }
+            return default;
+        }
         public Result<T, Exception> TryEvaluate<T>(IVariableProvider provider)
         {
             try