improved roll command

Command.cs

@@ -1,55 +1,42 @@
+using System.Text.RegularExpressions;
 
 namespace Dungeoneer {
 
 	public sealed class Command {
 
 		public static void Roll(IList<string> args) {
-			var argc = args.Count;
-			if(argc == 1) {
-				if(args[0].Contains("d")) {
-					var parts = args[0].Split('d');
-					Roll(new List<string> { parts[1], parts[0] });
+			if(args.Count == 0)
 				return;
-				}
-				var arg = args[0];
-				int sides;
-				try { sides = int.Parse(arg); }
-				catch(Exception _) {
-					Console.WriteLine($"'{arg}' is not a number");
-					return;
-				}
-				var result = Dungeoneer.Util.Roll(sides);
-				Console.WriteLine($" -> {result}");
-			} else if(argc == 2) {
-				var result = 0;
-				var first = args[0];
-				int sides;
-				try { sides = int.Parse(first); }
-				catch(Exception _) {
-					Console.WriteLine($"'{first}' is not a number");
-					return;
-				}
-				var second = args[1];
+			var expression = "";
+
+			foreach(string arg in args) {
+				string part;
+				if(arg.Contains('d')) {
+					var parts = arg.Split('d');
+					var first = parts[0];
+					var second = parts[1];
+
 					int count;
-				try { count = int.Parse(second); }
-				catch(Exception _) {
-					Console.WriteLine($"'{second}' is not a number");
-					return;
-				}
-				if(count == 1) {
-					Roll(new List<string> { first });
+					int sides;
+					try {
+						count = int.Parse(first);
+						sides = int.Parse(second);
+					} catch {
+						Console.WriteLine("'{arg}' is not a valid dice expression");
 						return;
 					}
 
-				var work = "";
-				for(int _ = 0; _ < count; _++) {
-					var roll = Dungeoneer.Util.Roll(sides);
-					result += roll;
-					work += $"{roll} ";
-				}
-				Console.WriteLine($"{work}\n -> {result}");
+					var result = 0;
+					for(int i = 0; i < count; i++)
+						result += Util.Roll(sides);
+					part = result.ToString();
 				} else
-				Console.WriteLine($"'roll' accepts 1 or 2 arguments ({argc} given)");
+					part = arg;
+				expression += $"{part} ";
+			}
+			
+			dynamic output = Scripting.Expr($"eval('{expression}')");
+			Console.WriteLine($"{expression}\n=> {output}");
 		}
 
 	}

Scripting.cs

@@ -28,9 +28,8 @@ namespace Dungeoneer {
 			Scope.roll = (Func<int, int>)Dungeoneer.Util.Roll;
 		}
 
-		public static void Run(string file) {
-			Engine.ExecuteFile(file, Scope);
-		}
+		public static void Run(string file) { Engine.ExecuteFile(file, Scope); }
+		public static dynamic Expr(string expression) { return Engine.Execute(expression, Scope); }
 
 		public static string Input(string prompt) {
 			Console.Write(prompt);