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Re: [tlaplus] Specifying an arbitrary function and then using it in TLC
On 25.11.20 10:31, Stephan Merz wrote:
CHOOSE is arbitrary but deterministic choice. In other words, with your
definition, TLC will generate one function (likely a very trivial one,
perhaps mapping every instruction of A to the same instruction of B) and
explore the spec for that particular function. If you want to explore
the spec for every possible function, make the mapping a variable of
your spec, add
translateFn \in [...]
to the initial condition and UNCHANGED translateFn to all actions. And
if you want to play with different hand-picked functions, add a CONSTANT
TranslateFn to your module and write
ASSUME TranslateFn \in [...]
then you define the particular function in the model. What is the right
way to go depends on whether you want to explore if your transpiler
works for some fixed function, for all functions or for some specific ones.
With the new-ish Randomization module [1,2], you could trick TLC to
check a more "interesting" subset of all functions.
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