| author | paulson |
| Mon, 24 May 1999 15:44:20 +0200 | |
| changeset 6701 | e84a0b941beb |
| parent 1247 | 18b1441fb603 |
| permissions | -rw-r--r-- |
(* Title: HOL/AxClasses/Tutorial/ProductInsts.thy ID: $Id$ Author: Markus Wenzel, TU Muenchen Instantiate the 'syntactic' class "product", then define "<*>" on type "bool". Note: This may look like Haskell-instance, but is not quite the same! *) ProductInsts = Product + instance bool :: product defs prod_bool_def "x <*> y == x & y::bool" end