in reply to Re: Can I check if a loop's scope is entered for the first time?
in thread Can I check if a loop's scope is entered for the first time?
> It would be nice if Perl's loop-keywords would also recognise an Iterator::* object and would treat it as expected... (internally rewriting it C-style, whatever).
I doubt this can be retro fitted without bracking backwards comaptibility.
You'd need a new keyword, like iter for my goal, this could actually be implemented with pluggable keywords.
Please note that you can already overload the diamond operator of a class to make the object an iterator (like a filehandle does)
This should work:
while ( my $next = <$obj> ) { ... }
but letting a generator init an iterator once wouldn't
while ( my $next = <generator($limit)> ) { ... }
because the diamond operator magically decides to become a file-glob here.
Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Wikisyntax for the Monastery