Re: [tlaplus] how to updating state and return in a definition

["Amir A.H.S.A" <amir.ahsa.2011@xxxxxxxxx>]

It is important to note that Calculate() is not a "function" that we use everyday in programming languages.

Calculate() is an action that changes the current state to the next state by changing the value of variable val.

AmirHossein

On Wed, May 15, 2019 at 5:24 AM Balaji Arun <ba2669@xxxxxx> wrote:

I am trying to have a specification with a definition for Calculate()

module A:

VARIABLE val

Calculate() ==
   val' = val + 1
   (*return [v: val] here*)

How do I return that val to whoever is calling it (even another module that instantiates module A)? Assuming multiple processes call Calculate concurrently.

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