From: Jim Pryor Date: Wed, 8 Dec 2010 23:31:20 +0000 (-0500) Subject: extend Chris' arg reversal to tree_monadize.ml X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff_plain;h=ebe5f10b42f512f81bfc9e4c19c361b3010c72f9 extend Chris' arg reversal to tree_monadize.ml Signed-off-by: Jim Pryor --- diff --git a/code/tree_monadize.ml b/code/tree_monadize.ml index 55b0f7b0..d23606f9 100644 --- a/code/tree_monadize.ml +++ b/code/tree_monadize.ml @@ -120,7 +120,7 @@ module Tree_monadizer(X : sig val unit : 'a -> 'a monad val bind : 'a monad -> ('a -> 'b monad) -> 'b monad end) = struct - let rec monadize (f: 'a -> 'b X.monad) (t: 'a tree) : 'b tree X.monad = + let rec monadize (t: 'a tree) (f: 'a -> 'b X.monad) : 'b tree X.monad = match t with | Leaf a -> X.bind (f a) (fun b -> X.unit (Leaf b)) | Node(l, r) -> @@ -164,7 +164,7 @@ module Tree_monadizer2(X : sig end) = struct (* the body of the monadize function is the same; the only difference is in * the types *) - let rec monadize (f: 'a -> ('b,'x) X.monad) (t: 'a tree) : ('b tree,'x) X.monad = + let rec monadize (t: 'a tree) (f: 'a -> ('b,'x) X.monad) : ('b tree,'x) X.monad = match t with | Leaf a -> X.bind (f a) (fun b -> X.unit (Leaf b)) | Node(l, r) -> @@ -194,13 +194,13 @@ let int_readerize : int -> int Reader_monad.monad = (* double each leaf *) let env = fun i -> i + i in -TreeReader.monadize int_readerize t1 env;; +TreeReader.monadize t1 int_readerize env;; (* You can also avoid declaring a separate toplevel TreeReader module * (or even a separate Reader_monad module) by using one of these forms: * ... * let module T = Tree_monadizer(Reader_monad) in - * T.monadize int_readerize t1 env;; + * T.monadize t1 int_readerize env;; * or: * ... * let env = fun i -> i + i in @@ -212,7 +212,7 @@ TreeReader.monadize int_readerize t1 env;; * fun e -> f (u e) e;; * end in * let module T = Tree_monadizer(Monad) in - * T.monadize int_readerize t1 env;; + * T.monadize t1 int_readerize env;; * or: * ... * let module T = Tree_monadizer(struct @@ -222,13 +222,13 @@ TreeReader.monadize int_readerize t1 env;; * let bind (u : 'a monad) (f : 'a -> 'b monad) : 'b monad = * fun e -> f (u e) e;; * end) in - * T.monadize int_readerize t1 env;; + * T.monadize t1 int_readerize env;; *) (* square each leaf *) let env = fun i -> i * i in -TreeReader.monadize int_readerize t1 env;; +TreeReader.monadize t1 int_readerize env;; @@ -240,34 +240,34 @@ let incrementer : int -> int State_monad.monad = (* count leaves *) let initial_store = 0 in -TreeState.monadize incrementer t1 initial_store;; +TreeState.monadize t1 incrementer initial_store;; (* replace leaves with list *) -TreeList.monadize (fun i -> [ [i;i*i] ]) t1;; +TreeList.monadize t1 (fun i -> [ [i;i*i] ]);; (* do nothing *) let initial_continuation = fun t -> t in -TreeCont.monadize Continuation_monad.unit t1 initial_continuation;; +TreeCont.monadize t1 Continuation_monad.unit initial_continuation;; (* convert tree to list of leaves *) let initial_continuation = fun t -> [] in -TreeCont.monadize (fun a k -> a :: k a) t1 initial_continuation;; +TreeCont.monadize t1 (fun a k -> a :: k a) initial_continuation;; (* square each leaf using continuation *) let initial_continuation = fun t -> t in -TreeCont.monadize (fun a k -> k (a*a)) t1 initial_continuation;; +TreeCont.monadize t1 (fun a k -> k (a*a)) initial_continuation;; (* replace leaves with list, using continuation *) let initial_continuation = fun t -> t in -TreeCont.monadize (fun a k -> k [a; a*a]) t1 initial_continuation;; +TreeCont.monadize t1 (fun a k -> k [a; a*a]) initial_continuation;; (* count leaves, using continuation *) let initial_continuation = fun t -> 0 in -TreeCont.monadize (fun a k -> 1 + k a) t1 initial_continuation;; +TreeCont.monadize t1 (fun a k -> 1 + k a) initial_continuation;; (* (* Tree monad *)