From: Claudio Sacerdoti Coen Date: Sat, 25 Apr 2009 19:30:10 +0000 (+0000) Subject: Slightly improved type for list_index. X-Git-Tag: make_still_working~4053 X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=c2bb2aba164211a16aa6e16e9037da38fb1b8675;p=helm.git Slightly improved type for list_index. --- diff --git a/helm/software/components/extlib/hExtlib.mli b/helm/software/components/extlib/hExtlib.mli index 972215107..0a8921b1b 100644 --- a/helm/software/components/extlib/hExtlib.mli +++ b/helm/software/components/extlib/hExtlib.mli @@ -92,7 +92,7 @@ val flatten_map: ('a -> 'b list) -> 'a list -> 'b list val list_last: 'a list -> 'a val list_mapi: ('a -> int -> 'b) -> 'a list -> 'b list (* Finds the zero based index of the first element that satisfies a predicate*) -val list_index: ('a -> bool) -> 'a list -> int +val list_index: ('a -> bool) -> 'a list -> (int * 'a) option val sharing_map: ('a -> 'a) -> 'a list -> 'a list (* Iters in parallel on two lists until the first list is empty. The second one can be shorter and is padded with a default value.