1 files changed, 13 insertions, 12 deletions
diff --git a/shell.go b/shell.go
index e244d10..bfb6f8c 100644
--- a/shell.go
+++ b/shell.go
@@ -140,20 +140,21 @@ var update = [...][]struct {
 	},
 }
 
-var byteClass = map[byte]class{
-	' ':  clBreak,
-	'\t': clBreak,
-	'\n': clNewline,
-	'\\': clQuote,
-	'\'': clSingle,
-	'"':  clDouble,
-}
-
 func classOf(b byte) class {
-	if c, ok := byteClass[b]; ok {
-		return c
+	switch b {
+	case ' ', '\t':
+		return clBreak
+	case '\n':
+		return clNewline
+	case '\\':
+		return clQuote
+	case '\'':
+		return clSingle
+	case '"':
+		return clDouble
+	default:
+		return clOther
 	}
-	return clOther
 }
 
 // A Scanner partitions input from a reader into tokens divided on space, tab,