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| author |  Adam Chlipala <adamc@csail.mit.edu> | 2017-01-25 15:55:14 -0500 |
|---|---|---|
| committer | Adam Chlipala <adamc@csail.mit.edu> | 2017-01-25 15:55:14 -0500 |
| commit | 41cd154483d45c5d2fb0abf392b9bdc63d42b94e (patch) | |
| tree | f1cb3fdcd83bc3b28ad2b76a21f5c1d1e350cbca | |
| parent | f7ab07f941b23ad64cdb6db04020fa7c595db8e4 (diff) | |
List.appi
| -rw-r--r-- | lib/ur/list.ur | 12 | ||||
| -rw-r--r-- | lib/ur/list.urs | 3 |
2 files changed, 15 insertions, 0 deletions
diff --git a/lib/ur/list.ur b/lib/ur/list.ur index 50764e46..cc533676 100644 --- a/lib/ur/list.ur +++ b/lib/ur/list.ur @@ -311,6 +311,18 @@ fun app [m] (_ : monad m) [a] f = app' end +fun appi [m] (_ : monad m) [a] f = + let + fun app' i ls = + case ls of + [] => return () + | x :: ls => + f i x; + app' (i + 1) ls + in + app' 0 + end + fun mapQuery [tables ::: {{Type}}] [exps ::: {Type}] [t ::: Type] [tables ~ exps] (q : sql_query [] [] tables exps) (f : $(exps ++ map (fn fields :: {Type} => $fields) tables) -> t) = diff --git a/lib/ur/list.urs b/lib/ur/list.urs index 432d8c1a..fd56679d 100644 --- a/lib/ur/list.urs +++ b/lib/ur/list.urs @@ -65,6 +65,9 @@ val all : a ::: Type -> (a -> bool) -> t a -> bool val app : m ::: (Type -> Type) -> monad m -> a ::: Type -> (a -> m unit) -> t a -> m unit +val appi : m ::: (Type -> Type) -> monad m -> a ::: Type + -> (int -> a -> m unit) -> t a -> m unit + val tabulateM : m ::: (Type -> Type) -> monad m -> a ::: Type -> (int -> m a) -> int -> m (t a) |