Comments on: Tools for TLA+ http://simon.zambrovski.org/2009/02/tools-for-tla/ "One Cannot Not Communicate" - Watzlawick Mon, 26 Dec 2011 11:17:41 +0000 hourly 1 http://wordpress.org/?v=3.1.4 By: gautham http://simon.zambrovski.org/2009/02/tools-for-tla/comment-page-1/#comment-1088 gautham Fri, 10 Feb 2012 17:49:00 +0000 http://simon.zambrovski.org/?p=151#comment-1088 hi can you please send me example specification you have written in TLA+? How can we give input statements in TLA+? hi can you please send me example specification you have written in TLA+? How can we give input statements in TLA+?

]]> By: Simon http://simon.zambrovski.org/2009/02/tools-for-tla/comment-page-1/#comment-884 Simon Fri, 10 Feb 2012 01:56:00 +0000 http://simon.zambrovski.org/?p=151#comment-884 Hi Varrun! If you check out the definition ofan action in TLA+, you will find out that it alwayshas a value. So X == IF condition THEN A else B is pretty reasanable. In a language like Java you would right this not as an imperative expression but like x = (condition) ? A : B. Hi Varrun!

If you check out the definition ofan action in TLA+, you will find out that it alwayshas a value. So X == IF condition THEN A else B is pretty reasanable. In a language like Java you would right this not as an imperative expression but like x = (condition) ? A : B.

]]> By: Varrun Ramani http://simon.zambrovski.org/2009/02/tools-for-tla/comment-page-1/#comment-878 Varrun Ramani Fri, 10 Feb 2012 10:58:00 +0000 http://simon.zambrovski.org/?p=151#comment-878 I had a small doubt in the Specification of the Hidden compartment that you have specified. You have specified a state ------------------------------------------------- LightOn == /\ light = "off" /\ light' = "on" /\ IF draw = "opened" THEN /\ state' = "unlockedPanel" /\ panel' = "unlocked" /\ door' = "locked" ELSE /\ state' = "waitingForDraw" /\ UNCHANGED <> /\ UNCHANGED <> --------------------------------------------- Here, you have used if like a flow control block like in a prog lang. But Since TLA is a formal language purely based on math, can we give such statements? Should not the IF THEN ELSE statements be should just be assignment statements?? I had a small doubt in the Specification of the Hidden compartment that you have specified. You have specified a state
————————————————-
LightOn ==
/\ light = “off”
/\ light’ = “on”
/\ IF draw = “opened” THEN
/\ state’ = “unlockedPanel”
/\ panel’ = “unlocked”
/\ door’ = “locked”
ELSE
/\ state’ = “waitingForDraw”
/\ UNCHANGED <>
/\ UNCHANGED <>
———————————————
Here, you have used if like a flow control block like in a prog lang. But Since TLA is a formal language purely based on math, can we give such statements? Should not the IF THEN ELSE statements be should just be assignment statements??

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