[hcoop/debian/mlton.git] / lib / mlton / basic / escape.sml

(* Copyright (C) 1999-2006 Henry Cejtin, Matthew Fluet, Suresh
 *    Jagannathan, and Stephen Weeks.
 *
 * MLton is released under a BSD-style license.
 * See the file MLton-LICENSE for details.
 *)

structure Escape: ESCAPE =
struct

type 'a t = 'a -> exn

fun escape (e, a) = raise (e a)

fun new (f: 'a t -> 'a): 'a =
   let exception E of 'a
   in f E handle E a => a
   end

end
Commit	Line	Data
7f918cf1 CE	1	(* Copyright (C) 1999-2006 Henry Cejtin, Matthew Fluet, Suresh
	2	* Jagannathan, and Stephen Weeks.
	3	*
	4	* MLton is released under a BSD-style license.
	5	* See the file MLton-LICENSE for details.
	6	*)
	7
	8	structure Escape: ESCAPE =
	9	struct
	10
	11	type 'a t = 'a -> exn
	12
	13	fun escape (e, a) = raise (e a)
	14
	15	fun new (f: 'a t -> 'a): 'a =
	16	let exception E of 'a
	17	in f E handle E a => a
	18	end
	19
	20	end