Hello

Is there a way to break out early, upon some condition (e.g. dep on some successful match{..}), from repetition macros such as rept, irp, irps, irpv... ?

basically sthg similar to following assembly construct, but available at the preprocessing stage :
repeat
(..)
if (..)
break
end if
(..)
end repeat


Tx
[/b]

"break" is possible only in "repeat", "while"

i see.. really too bad.. is there any alternative way to replicates sthg roughly simililar a while / end while loop at preprocessing stage ?
e.G. use case :
1/build a list of values using a symbolic constant, redefining it several time
(multiple EQU's / DEFINEs)
2/ lookup a particular value in that list
=>easy to iterate thru the values using irpv till i find the searched item,
but then how can i exit the loop once the value is found ?
i am forced to iterate anyway till the end of the list....

I would think for what you want you need to set some variable to say "found", and ignore future iterations based upon that variable. And, yes, the preprocessor would continue to iterate through the remaining values because there is not any method to stop it, aside from halting assembly completely with an error condition.

The preprocessor only runs once, unlike the assembler, so if list is very large you might notice some slowdown.

indeed, i had devised this workaround (i.e. set some variable to say "found", and ignore future iterations based upon that variable)... but that just looks a bit silly to me. Would such feature be so tricky to add to fasm preprocessor ? i am having a hard time understanding why it would make less sense to have it in preprocessing stage loop constructs, while it was seen very sensible and implemented for assembly time loop constructs .. and after all, that looks very much like a very basic feature of any kind of automated processing...

Does a macro that remain input help if "break" change it into an empty one

I don't understand your query. Can you post an example of what you mean?