diff options
Diffstat (limited to 'lib/ur/list.ur')
-rw-r--r-- | lib/ur/list.ur | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/ur/list.ur b/lib/ur/list.ur index 2679d877..35440de2 100644 --- a/lib/ur/list.ur +++ b/lib/ur/list.ur @@ -133,6 +133,16 @@ fun mapX [a] [ctx ::: {Unit}] f = mapX' end +fun mapXi [a] [ctx ::: {Unit}] f = + let + fun mapX' i ls = + case ls of + [] => <xml/> + | x :: ls => <xml>{f i x}{mapX' (i + 1) ls}</xml> + in + mapX' 0 + end + fun mapM [m ::: (Type -> Type)] (_ : monad m) [a] [b] f = let fun mapM' acc ls = |