diff --git a/symbol-map.go b/symbol-map.go
index f6048c9..4223ec3 100644
--- a/symbol-map.go
+++ b/symbol-map.go
@@ -14,7 +14,9 @@ type symbolClass int16
 
 const (
 	symClassOperator symbolClass = iota
+	symClassPostOp
 	symClassIdentifier
+	symClassDelimiter
 	symClassParenthesis
 	symClassDeclaration
 	symClassValue
@@ -50,10 +52,10 @@ func init() {
 		SymSemiColon:       {";", symClassOperator},      //  17: ';'
 		SymDot:             {".", symClassOperator},      //  18: '.'
 		SymDotSlash:        {"./", symClassOperator},     //  19: './'
-		SymQuote:           {"'", symClassOperator},      //  20: '\''
-		SymDoubleQuote:     {"\"", symClassOperator},     //  21: '"'
+		SymQuote:           {"'", symClassDelimiter},     //  20: '\''
+		SymDoubleQuote:     {"\"", symClassDelimiter},    //  21: '"'
 		SymBackTick:        {"`", symClassOperator},      //  22: '`'
-		SymExclamation:     {"!", symClassOperator},      //  23: '!'
+		SymExclamation:     {"!", symClassPostOp},        //  23: '!'
 		SymQuestion:        {"?", symClassOperator},      //  24: '?'
 		SymAmpersand:       {"&", symClassOperator},      //  25: '&'
 		SymDoubleAmpersand: {"&&", symClassOperator},     //  26: '&&'
@@ -86,7 +88,7 @@ func init() {
 		SymAppend:          {"<<", symClassOperator},     //  53: '<<'
 		SymCaret:           {"^", symClassOperator},      //  54: '^'
 		SymDollarRound:     {"$(", symClassOperator},     //  55: '$('
-		SymOpenClosedRound: {"()", symClassOperator},     //  56: '()'
+		SymOpenClosedRound: {"()", symClassPostOp},       //  56: '()'
 		SymDoubleDollar:    {"$$", symClassOperator},     //  57: '$$'
 		SymDoubleDot:       {"..", symClassOperator},     //  58: '..'
 		SymTripleDot:       {"...", symClassOperator},    //  59: '...'