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doc-src/Tutorial/Misc/Last.thy
author wenzelm
Fri, 21 May 2004 21:26:19 +0200
changeset 14790 0d984ee030a1
parent 5377 efb799c5ed3c
permissions -rw-r--r--
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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Last = List +
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consts last :: 'a list => 'a
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recdef last "measure (%xs. length xs)"
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    "last [x]      = x"
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    "last (x#y#zs) = last (y#zs)"
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end
isabelle