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Diffstat (limited to 'TreeZipperUtils.hs')
| -rw-r--r-- | TreeZipperUtils.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/TreeZipperUtils.hs b/TreeZipperUtils.hs new file mode 100644 index 0000000..b6410a3 --- /dev/null +++ b/TreeZipperUtils.hs @@ -0,0 +1,12 @@ +module TreeZipperUtils where + +import Data.Tree +import Data.Tree.Zipper + +-- Return loc (as parent-like structure) and parents. +path :: TreePos Full a -> [(Forest a, a, Forest a)] +path loc = toParent loc : parents loc + +-- Return parent stack compatible form of loc. +toParent :: TreePos Full a -> (Forest a, a, Forest a) +toParent loc = (before loc, label loc, after loc) |