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style: improve new code

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This commit is contained in:
Simon Cruanes 2019-10-29 21:50:22 -05:00
parent 509dacb96f
commit c1704d71ff
2 changed files with 33 additions and 28 deletions
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58
src/data/CCDeque.ml
View file

@ -249,24 +249,25 @@ let update_front d f =
match d.cur.cell with
| Zero -> ()
| One x ->
begin match f x with
| None -> if Stdlib.(!=) d.cur.prev d.cur then (
d.cur.prev.next <- d.cur.next;
d.cur.next.prev <- d.cur.prev;
d.cur <- d.cur.next;
)
else d.cur.cell <- Zero
| Some x -> d.cur.cell <- One x
end
begin match f x with
| None -> if Stdlib.(!=) d.cur.prev d.cur then (
d.cur.prev.next <- d.cur.next;
d.cur.next.prev <- d.cur.prev;
d.cur <- d.cur.next;
)
else d.cur.cell <- Zero
| Some x -> d.cur.cell <- One x
end
| Two (x, y) ->
begin match f x with
| None -> d.cur.cell <- One (y)
| Some x -> d.cur.cell <- Two (x,y)
end
begin match f x with
| None -> d.cur.cell <- One (y)
| Some x -> d.cur.cell <- Two (x,y)
end
| Three (x,y,z) ->
match f x with
| None -> d.cur.cell <- Two (y,z)
| Some x -> d.cur.cell <- Three (x,y,z)
begin match f x with
| None -> d.cur.cell <- Two (y,z)
| Some x -> d.cur.cell <- Three (x,y,z)
end
(*$T update_front
let q = of_list [1;2;3;4;5;6;7] in update_front q (fun _ -> None); to_list q = [2;3;4;5;6;7]
@ -290,20 +291,21 @@ let update_back d f =
match n.cell with
| Zero -> ()
| One x ->
begin match f x with
| None -> if Stdlib.(!=) d.cur.prev d.cur then remove_node_ n
else n.cell <- Zero
| Some x -> n.cell <- One x
end
begin match f x with
| None -> if Stdlib.(!=) d.cur.prev d.cur then remove_node_ n
else n.cell <- Zero
| Some x -> n.cell <- One x
end
| Two (x, y) ->
begin match f y with
| None -> n.cell <- One (x)
| Some y -> n.cell <- Two (x,y)
end
begin match f y with
| None -> n.cell <- One (x)
| Some y -> n.cell <- Two (x,y)
end
| Three (x,y,z) ->
match f z with
| None -> n.cell <- Two (x,y)
| Some z -> n.cell <- Three (x,y,z)
begin match f z with
| None -> n.cell <- Two (x,y)
| Some z -> n.cell <- Three (x,y,z)
end
(*$T update_back
let q = of_list [1;2;3;4;5;6;7] in update_back q (fun _ -> None); to_list q = [1;2;3;4;5;6]

3
src/data/CCDeque.mli
View file

@ -83,10 +83,13 @@ val take_front_opt : 'a t -> 'a option
val update_back : 'a t -> ('a -> 'a option) -> unit
(** Update last value. If the deque is empty do nothing.
If the function returns [None], remove last element;
if it returns [Some x], replace last element with [x].
@since NEXT_RELEASE *)
val update_front : 'a t -> ('a -> 'a option) -> unit
(** Update first value. If the deque is empty do nothing.
Similar to {!update_back} but for the first value.
@since NEXT_RELEASE *)
val append_front : into:'a t -> 'a t -> unit