src/HOLCF/Tr.thy
 author wenzelm Thu Aug 27 20:46:36 1998 +0200 (1998-08-27) changeset 5400 645f46a24c72 parent 3842 b55686a7b22c child 10834 a7897aebbffc permissions -rw-r--r--
1 (*  Title:      HOLCF/Tr.thy
2     ID:         \$Id\$
3     Author:     Franz Regensburger
4     Copyright   1993 Technische Universitaet Muenchen
6 Introduce infix if_then_else_fi and boolean connectives andalso, orelse
7 *)
9 Tr = Lift + Fix +
11 types
12   tr = "bool lift"
14 translations
15   "tr" <= (type) "bool lift"
17 consts
18 	TT,FF           :: "tr"
19         Icifte          :: "tr -> 'c -> 'c -> 'c"
20         trand           :: "tr -> tr -> tr"
21         tror            :: "tr -> tr -> tr"
22         neg             :: "tr -> tr"
23         If2             :: "tr=>'c=>'c=>'c"
25 syntax  "@cifte"        :: "tr=>'c=>'c=>'c" ("(3If _/ (then _/ else _) fi)" 60)
26         "@andalso"      :: "tr => tr => tr" ("_ andalso _" [36,35] 35)
27         "@orelse"       :: "tr => tr => tr" ("_ orelse _"  [31,30] 30)
29 translations
30 	     "x andalso y" == "trand`x`y"
31              "x orelse y"  == "tror`x`y"
32              "If b then e1 else e2 fi" == "Icifte`b`e1`e2"
33 defs
34   TT_def      "TT==Def True"
35   FF_def      "FF==Def False"
36   neg_def     "neg == flift2 Not"
37   ifte_def    "Icifte == (LAM b t e. flift1(%b. if b then t else e)`b)"
38   andalso_def "trand == (LAM x y. If x then y else FF fi)"
39   orelse_def  "tror == (LAM x y. If x then TT else y fi)"
40   If2_def     "If2 Q x y == If Q then x else y fi"
42 end