Merge "libutil: fix args assert being thrown on Darwin in nix-eval-jobs" into main

1 files changed, 7 insertions, 0 deletions

diff --git a/src/libutil/args.hh b/src/libutil/args.hh
index 35a5238c0..71f8f88fa 100644
--- a/src/libutil/args.hh
+++ b/src/libutil/args.hh
@@ -244,6 +244,13 @@ protected:
      */
     virtual void initialFlagsProcessed() {}
 
+    /**
+     * Returns this Args as a RootArgs if it is one, or \ref std::nullopt otherwise.
+     */
+    virtual std::optional<std::reference_wrapper<RootArgs>> asRootArgs() {
+        return std::nullopt;
+    }
+
 public:
 
     void addFlag(Flag && flag);