1 files changed, 5 insertions, 0 deletions
diff --git a/vendor/github.com/bytedance/sonic/ast/parser.go b/vendor/github.com/bytedance/sonic/ast/parser.go
index 3e5309c19..a1f582623 100644
--- a/vendor/github.com/bytedance/sonic/ast/parser.go
+++ b/vendor/github.com/bytedance/sonic/ast/parser.go
@@ -653,3 +653,8 @@ func (self *Parser) ExportError(err types.ParsingError) error {
         Code: err,
     }.Description())
 }
+
+func backward(src string, i int) int {
+    for ; i>=0 && isSpace(src[i]); i-- {}
+    return i
+}