perlquestion
QM
I've noticed recently that the debugger doesn't pause on <code>elsif</code>s, making it confusing to follow sometimes.
<p>
For instance, given this code:
<blockquote><code>
#!/your/perl/here
use strict;
use warnings;
my $rand = rand;
if ( $rand < rand ) # 1
{
print "if 1: $rand\n";
}
elsif ( $rand < rand ) # 2
{
print "elsif 2: $rand\n";
}
elsif ( $rand < rand ) # 3
{
print "elsif 3: $rand\n";
}
else
{
print "else 4: $rand\n";
}
</code></blockquote>
I get the following in a debugger session:
<blockquote><code>
C:\Perl\perl\perlmonks>perl -d skip_elsif.pl
Loading DB routines from perl5db.pl version 1.19
Editor support available.
Enter h or `h h' for help, or `perldoc perldebug' for more help.
main::(skip_elsif.pl:6): my $rand = rand;
DB<1> s
main::(skip_elsif.pl:8): if ( $rand < rand ) # 1
main::(skip_elsif.pl:9): {
DB<1> p $rand
0.63232421875
DB<2>
main::(skip_elsif.pl:22): print "else 4: $rand\n";
DB<2>
else 4: 0.63232421875
</code></blockquote>
I'm expecting the debugger to pause on each conditional, especially as I might want to inspect some of the variables before the next evaluation. [I wouldn't mind if it paused on <code>else</code>s also, but I supposed that's too much to ask?]
<p>
Why does it work this way?
<div class="pmsig"><div class="pmsig-294463">
<p>-QM<br />
--<br />
Quantum Mechanics: The dreams stuff is made of
</div></div>