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a few more combinators for Behavior

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Simon Cruanes 2013-05-31 12:20:13 +02:00
parent fa40412216
commit a45fccca98
2 changed files with 17 additions and 2 deletions
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10
behavior.ml
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@ -77,9 +77,9 @@ let test_signal s = TestFun (fun () -> React.S.value s)
let wait e = Wait e
let timeout f = Sequence (false, [Timeout f; Fail])
let timeout f = Sequence (false, [Timeout f; fail])
let delay f = Sequence (false, [Timeout f; Succeed])
let delay f = Sequence (false, [Timeout f; succeed])
let do_ act = Do act
@ -87,10 +87,16 @@ let do_succeed act = Do (fun () -> act (); true)
let if_ s then_ else_ = If (s, then_, else_)
let when_ s t = if_ s t succeed
let while_ s l = Sequence (true, (test_signal s) :: l)
let sequence ?(loop=false) l =
assert (l <> []);
Sequence (loop, l)
let repeat t = sequence ~loop:true [t]
let select ?(strat=strategy_inorder) l =
assert (l <> []);
Select (strat, l)

9
behavior.mli
View file

@ -109,9 +109,18 @@ val do_succeed : (unit -> unit) -> tree
val if_ : bool React.signal -> tree -> tree -> tree
(** Conditional choice, based on the current value of the signal *)
val when_ : bool React.signal -> tree -> tree
(** Run the given tree if the signal is true, else succeed *)
val while_ : bool React.signal -> tree list -> tree
(** While the signal is true, run the subtrees *)
val sequence : ?loop:bool -> tree list -> tree
(** Sequence of sub-trees to run *)
val repeat : tree -> tree
(** Repeat the same tree indefinitely *)
val select : ?strat:select_strategy -> tree list -> tree
(** Choice among the subtrees. The strategy defines in which order subtrees
are tried. *)