Use switch statement for operator tokenization.

OpenRA.Game/Support/ConditionExpression.cs

@@ -166,10 +166,11 @@ namespace OpenRA.Support
 		static Token ParseSymbol(string expression, ref int i)
 		{
 			var start = i;
-			var c = expression[start];
 
 			// Parse operators
-			if (c == '!')
+			switch (expression[start])
+			{
+				case '!':
 				{
 					if (i < expression.Length - 1 && expression[start + 1] == '=')
 					{
@@ -180,7 +181,7 @@ namespace OpenRA.Support
 					return new NotToken(start);
 				}
 
-			if (c == '=')
+				case '=':
 				{
 					if (i < expression.Length - 1 && expression[start + 1] == '=')
 					{
@@ -191,7 +192,7 @@ namespace OpenRA.Support
 					throw new InvalidDataException("Unexpected character '=' at index {0}".F(start));
 				}
 
-			if (c == '&')
+				case '&':
 				{
 					if (i < expression.Length - 1 && expression[start + 1] == '&')
 					{
@@ -202,7 +203,7 @@ namespace OpenRA.Support
 					throw new InvalidDataException("Unexpected character '&' at index {0}".F(start));
 				}
 
-			if (c == '|')
+				case '|':
 				{
 					if (i < expression.Length - 1 && expression[start + 1] == '|')
 					{
@@ -212,6 +213,9 @@ namespace OpenRA.Support
 
 					throw new InvalidDataException("Unexpected character '|' at index {0}".F(start));
 				}
+			}
+
+			var c = expression[start];
 
 			// Scan forwards until we find an non-digit character
 			if (c == '-' || char.IsDigit(expression[i]))