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doc-src/Tutorial/Datatype/triemain.ML
author paulson
Fri, 05 Nov 1999 12:45:37 +0100
changeset 7999 7acf6eb8eec1
parent 5851 15ce4c1c8313
permissions -rw-r--r--
Algebra and Polynomial theories, by Clemens Ballarin
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
5851
15ce4c1c8313 New section on advanced datatypes.
nipkow
parents:
diff changeset 
     1
 
Goal "!t v bs. lookup (update t as v) bs = \
15ce4c1c8313 New section on advanced datatypes.
nipkow
parents:
diff changeset 
     2
 
\              (if as=bs then Some v else lookup t bs)";
isabelle