1 files changed, 7 insertions, 0 deletions
diff --git a/Src/zsh.h b/Src/zsh.h
index 3c1623c1f..3854116c0 100644
--- a/Src/zsh.h
+++ b/Src/zsh.h
@@ -210,8 +210,15 @@ enum {
      * in those cases where we need to represent a complete set.
      */
     QT_BACKTICK,
+    /*
+     * Single quotes, but the default is not to quote unless necessary.
+     * This is only useful as an argument to quotestring().
+     */
+    QT_SINGLE_OPTIONAL
 };
 
+#define QT_IS_SINGLE(x)	((x) == QT_SINGLE || (x) == QT_SINGLE_OPTIONAL)
+
 /*
  * Lexical tokens: unlike the character tokens above, these never
  * appear in strings and don't necessarily represent a single character.