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| author |  Matej Kosik <m4tej.kosik@gmail.com> | 2016-02-17 10:32:40 +0100 |
|---|---|---|
| committer | Matej Kosik <m4tej.kosik@gmail.com> | 2016-02-17 11:13:04 +0100 |
| commit | 06fa0334047a9400d0b5a144601fca35746a53b8 (patch) | |
| tree | c3afdf28353d5ea096b1c6e3aece87ed17015b1c /lib/util.mli | |
| parent | 9a7afc12e0573c74d0bb0943372dddc3c61a03f1 (diff) | |
CLEANUP: Renaming "Util.compose" function to "%"
I propose to change the name of the "Util.compose" function to "%".
Reasons:
1. If one wants to express function composition,
then the new name enables us to achieve this goal easier.
2. In "Batteries Included" they had made the same choice.
Diffstat (limited to 'lib/util.mli')
| -rw-r--r-- | lib/util.mli | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/util.mli b/lib/util.mli index 7923c65a3..559874bb8 100644 --- a/lib/util.mli +++ b/lib/util.mli @@ -83,7 +83,15 @@ val matrix_transpose : 'a list list -> 'a list list (** {6 Functions. } *) val identity : 'a -> 'a -val compose : ('a -> 'b) -> ('c -> 'a) -> 'c -> 'b + +(** Function composition: the mathematical [∘] operator. + + So [g % f] is a synonym for [fun x -> g (f x)]. + + Also because [%] is right-associative, [h % g % f] means [fun x -> h (g (f x))]. +*) +val (%) : ('a -> 'b) -> ('c -> 'a) -> 'c -> 'b + val const : 'a -> 'b -> 'a val iterate : ('a -> 'a) -> int -> 'a -> 'a val repeat : int -> ('a -> unit) -> 'a -> unit |