diff options
Diffstat (limited to 'lib/ur/list.ur')
-rw-r--r-- | lib/ur/list.ur | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/ur/list.ur b/lib/ur/list.ur index 10877420..b38097b7 100644 --- a/lib/ur/list.ur +++ b/lib/ur/list.ur @@ -293,6 +293,20 @@ fun search [a] [b] f = search' end +fun searchM [m] (_ : monad m) [a] [b] f = + let + fun search' ls = + case ls of + [] => return None + | x :: ls => + o <- f x; + case o of + None => search' ls + | v => return v + in + search' + end + fun foldlM [m] (_ : monad m) [a] [b] f = let fun foldlM' acc ls = |