Re: [isabelle] automatic case splitting during simp

On 08/12/2009, at 10:13 AM, Lucas Dixon wrote:
> It would be nice to have some tools that let one derive case statements
> from function definitions and visa-versa. Having the function definition
> style of equations provides nice simp rules which don't expand the case
> statements.

Thomas actually has made up a nice Isar attribute for that: it gives you (from a case statement) the standard simp rules you'd write in a function definition.

I'll see if we can dig this up and release it.

The other way would be to have the function package automatically prove the split rule instead.


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