Constant statement limitations.

[dunbarx at aol.com]

Alex.


I have found that if you say this:


contant x = 4


on mouseup
  answer x
end mouseup


You get a "4"


But, if you place the contstant statement below the handler, you geet "x".


Is this what tripped you up?


Craig Newman



-----Original Message-----
From: Alex Tweedly <alex at tweedly.net>
To: How to use LiveCode <use-livecode at lists.runrev.com>
Sent: Mon, May 28, 2012 7:02 pm
Subject: Constant statement limitations.


The dictionary entry for constant says:
>
> If you place the constant statement in a handler, you can use the 
> constant anywhere in the handler. If you place the constant statement 
> in a script outside any handler, you can use the constant anywhere in 
> the handlers of that script.
NB - "can use the constant anywhere *in the handlers* of that script".

That was a reasonable limitation in traditional Livecode - but seems 
less reasonable in the context of revserver. It is (I think) common 
practice, and it's certainly possible, to have quite a lot of the 
"top-level" code be in the script itself, perhaps with html intermingled 
with it, i.e. not be in a handler.

So the obvious, simple code fragment

constant K = 3.14159
put $_POST["diameter"] * K

doesn't give the expected result :-)

Anyone see any reason why constants *shouldn't* be usable outside handlers ?

Thanks
-- Alex.
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