| author | wenzelm |
| Sat, 30 Apr 2011 23:27:57 +0200 | |
| changeset 42509 | 9d107a52b634 |
| parent 16417 | 9bc16273c2d4 |
| permissions | -rw-r--r-- |
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(*<*) |
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theory fakenat imports Main begin; |
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(*>*) |
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text{*\noindent
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The type \tydx{nat} of natural
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numbers is predefined to have the constructors \cdx{0} and~\cdx{Suc}. It behaves as if it were declared like this:
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*} |
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datatype nat = 0 | Suc nat |
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(*<*) |
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end |
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(*>*) |