| author | berghofe |
| Wed, 20 Feb 2002 15:58:38 +0100 | |
| changeset 12907 | 27e6d344d724 |
| parent 243 | c22b85994e17 |
| permissions | -rw-r--r-- |
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Franz Regensburger's Higher-Order Logic of Computable Functions embedding LCF
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(* Title: HOLCF/tr2.thy |
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Franz Regensburger's Higher-Order Logic of Computable Functions embedding LCF
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ID: $Id$ |
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Author: Franz Regensburger |
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Copyright 1993 Technische Universitaet Muenchen |
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Introduce infix if_then_else_fi and boolean connectives andalso, orelse |
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*) |
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Tr2 = Tr1 + |
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consts |
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"@cifte" :: "tr=>'c=>'c=>'c" |
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("(3If _/ (then _/ else _) fi)" [60,60,60] 60)
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"Icifte" :: "tr->'c->'c->'c" |
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"@andalso" :: "tr => tr => tr" ("_ andalso _" [61,60] 60)
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"cop @andalso" :: "tr -> tr -> tr" ("trand")
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"@orelse" :: "tr => tr => tr" ("_ orelse _" [61,60] 60)
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"cop @orelse" :: "tr -> tr -> tr" ("tror")
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rules |
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ifte_def "Icifte == (LAM t e1 e2.tr_when[e1][e2][t])" |
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andalso_def "trand == (LAM t1 t2.tr_when[t2][FF][t1])" |
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orelse_def "tror == (LAM t1 t2.tr_when[TT][t2][t1])" |
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end |
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ML |
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(* ----------------------------------------------------------------------*) |
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(* translations for the above mixfixes *) |
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(* ----------------------------------------------------------------------*) |
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fun ciftetr ts = |
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let val Cfapp = Const("fapp",dummyT) in
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Cfapp $ |
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(Cfapp $ |
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(Cfapp$Const("Icifte",dummyT)$(nth_elem (0,ts)))$
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(nth_elem (1,ts)))$ |
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(nth_elem (2,ts)) |
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end; |
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val parse_translation = [("@andalso",mk_cinfixtr "@andalso"),
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("@orelse",mk_cinfixtr "@orelse"),
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("@cifte",ciftetr)];
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val print_translation = []; |
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