holy carp it parses

tokentype.go

@@ -59,6 +59,17 @@ const (
 	tokenTypeEOF
 )
 
+var keywordTokenTypes = []tokenType{
+	tokenTypeClass,
+	tokenTypeFun,
+	tokenTypeVar,
+	tokenTypeFor,
+	tokenTypeIf,
+	tokenTypeReturn,
+	tokenTypeWhile,
+	tokenTypePrint,
+}
+
 type token struct {
 	Type    tokenType
 	Lexeme  string
@@ -69,3 +80,12 @@ type token struct {
 func (t token) String() string {
 	return fmt.Sprintf("%s %s %+v", t.Type, t.Lexeme, t.Literal)
 }
+
+func isKeyword(token *token) bool {
+	for _, kt := range keywordTokenTypes {
+		if token.Type == kt {
+			return true
+		}
+	}
+	return false
+}