reimplemented 'pool' roll macro

src/Lex.cs

@@ -81,6 +81,12 @@ namespace Dungeoneer.Interpreter {
 		public TokenSet() : base() { }
 		public TokenSet(List<Token> set) : base(set) { }
 
+		public Token Pop() {
+			Token output = this[0];
+			RemoveAt(0);
+			return output;
+		}
+
 		public override string ToString() {
 			var output = "";
 			foreach(Token token in this)

src/Roll.cs

@@ -1,6 +1,7 @@
 using System.Security.Cryptography;
 using System.Text.RegularExpressions;
 
+using Dungeoneer.Error;
 using Dungeoneer.Interpreter;
 
 namespace Dungeoneer {
@@ -9,9 +10,35 @@ namespace Dungeoneer {
 
 		public static void Pool(TokenSet input) {
 			if(input.Count != 2)
+				throw new SyntaxException($"expected 2 arguments ({input.Count} given)");
 
-			foreach(var token in input)
-			);
+			DiceToken dicePool = null;
+			DcToken target = null;
+			foreach(var token in input) {
+				switch(token) {
+					case DiceToken dice:
+						if(dicePool != null)
+							throw new SyntaxException("two dice"); 
+						dicePool = dice;
+						break;
+					case DcToken dc:
+						if(target != null)
+							throw new SyntaxException("two dc values");
+						target = dc;
+						break;
+				}
+			}
+
+			bool success = false;
+			foreach(var roll in dicePool.Result) {
+				if(roll > target.Value) {
+					success = true;
+					break;
+				}
+			}
+
+			string message = success ? $"{Format.Green}pass" : "{Format.Red}fail";
+			Console.WriteLine($"{dicePool} > {target}\n => {message}{Format.Reset}");
 		}
 
 	}