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-rw-r--r--StackSet.hs4
1 files changed, 3 insertions, 1 deletions
diff --git a/StackSet.hs b/StackSet.hs
index 95ff29f..221e123 100644
--- a/StackSet.hs
+++ b/StackSet.hs
@@ -413,7 +413,9 @@ renameTag :: Eq i => i -> i -> StackSet i l a s sd -> StackSet i l a s sd
renameTag o n = mapWorkspace rename
where rename w = if tag w == o then w { tag = n } else w
--- | Ensure that a given set of tags is present.
+-- | Ensure that a given set of workspace tags is present by renaming
+-- existing workspaces and/or creating new hidden workspaces as
+-- necessary.
ensureTags :: Eq i => l -> [i] -> StackSet i l a s sd -> StackSet i l a s sd
ensureTags l allt st = et allt (map tag (workspaces st) \\ allt) st
where et [] _ s = s