author | berghofe |
Tue, 30 Jun 1998 20:51:15 +0200 | |
changeset 5102 | 8c782c25a11e |
parent 3842 | b55686a7b22c |
child 8874 | 3242637f668c |
permissions | -rw-r--r-- |
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(* Title: Subst/AList.thy |
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ID: $Id$ |
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Author: Martin Coen, Cambridge University Computer Laboratory |
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Copyright 1993 University of Cambridge |
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Association lists. |
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*) |
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AList = List + |
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consts |
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alist_rec :: "[('a*'b)list, 'c, ['a, 'b, ('a*'b)list, 'c]=>'c] => 'c" |
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assoc :: "['a,'b,('a*'b) list] => 'b" |
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New version, modified by Konrad Slind and LCP for TFL
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defs |
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alist_rec_def "alist_rec al b c == list_rec b (split c) al" |
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assoc_def "assoc v d al == alist_rec al d (%x y xs g. if v=x then y else g)" |
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end |