Akim Demaille <[EMAIL PROTECTED]> writes:
> 2. error messages
> for some reason I did not track down, am outputs only the suffix
> (.am), instead of the name of the bad file (Makefile.am).
Tracked down, and I have a fix, but given that I don't understand why
it behaves this way, I'd like some insight from Perl hackers.
At the top level we have:
# Now do all the work on each file.
foreach my $am_file (@input_files)
{
if (! -f ($am_file . '.am'))
{
&am_error ("\`" . $am_file . ".am' does not exist");
}
else
{
&generate_makefile ($output_files{$am_file}, $am_file);
}
}
and there is a sub:
# Print an error message and set exit status.
sub am_error
{
warn "$me: ${am_file}.am: @_\n";
$exit_status = 1;
}
I can understand above $am_file is local to the loop, so it's wrong,
OK. But what I don't understand then is that if I move the `my'
before, hence at the top level:
# Now do all the work on each file.
my $am_file;
foreach $am_file (@input_files)
{
if (! -f ($am_file . '.am'))
{
&am_error ("\`" . $am_file . ".am' does not exist");
}
else
{
&generate_makefile ($output_files{$am_file}, $am_file);
}
}
then &am_error still cannot see $am_file. This time I don't
understand. Sure, it works if $am_file is declared local, but I'd
like to understand why. It was my understanding that top level `my'
where global to the whole file, so how come am_error does not see it?
How come it works with $me and the other my'd globals? Is there
anything special about foreach loops?
