return "error" code from standalone compile
Douglas A. Ruisaard
dougr at telus.net
Thu Dec 10 12:51:32 EST 2020
I use AUTOHOTKEY... as a fast, dirty way to "get stuff done" when I'm either too lazy or too rushed to do a "quality" job with Livecode. It has a command called "Run" & "Runwait" ... which returns the calling program's (Livecode executable, in this case) return code into a predefined variable called "ErrorLevel" (how original!). So a line in a AUTOHOTKEY script for this would look like:
cmd = c:\livecode\SomeLiveCode.exe
exitcode := ErrorLevel
if (exitcode > 1)
Autohotkey takes some getting used to but I think it's a handy addition to development projects.. since AHK scripts can be compiled into executables, themselves.
My 4.5 cents
From: use-livecode [mailto:use-livecode-bounces at lists.runrev.com] On Behalf Of John Balgenorth via use-livecode
Sent: Thursday, December 10, 2020 4:03 AM
To: How to use LiveCode
Cc: John Balgenorth
Subject: Re: return "error" code from standalone compile
Since Livecode is written in C++ here is some
info about using return in C.
Every C program has a function named main. At the
end of the function the programmer usually writes a
That tells the c program the code has completed
and is exiting with a 0 value which confirms it has
successfully executed the code and is quitting.
At any point above that line the programmer can write
a return call but they will usually use a 1 on another
value. The program will exit the code at that point and
it does not matter what value is entered after the return
but 1 usually means the code failed and any other value
but 0 means anything you want it to mean.
> On Dec 9, 2020, at 8:52 PM, J. Landman Gay via use-livecode <use-livecode at lists.runrev.com> wrote:
> I don't know much about this but it looks interesting. Is there a list of exit codes somewhere? When the OS receives the exit code, what happens? I.e., how would I use it?
> Jacqueline Landman Gay | jacque at hyperactivesw.com
> HyperActive Software | http://www.hyperactivesw.com
>> On December 9, 2020 7:48:10 PM Mark Wieder via use-livecode <use-livecode at lists.runrev.com> wrote:
>>> On 12/9/20 5:32 PM, Douglas A. Ruisaard via use-livecode wrote:
>>> On the completion of a stack, can the compiled executable return an error
>>> code like the old DOS ErrorLevel value(s)? If so, how do you specify the
>>> error code? in the on closeStack call?
>> See the quit command in the dictionary.
>> quit 42
>> Mark Wieder
>> ahsoftware at gmail.com
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