I'm having trouble with a Perl regex which tests whether one string is contained in another. In real life, the data comes from a file and a database, but the code snippet below demonstrates the issue:
$var1 = 'A [B:2013-03] C';
$var2 = '[B:2013-03]';
print "Match!\n" if $var1 =~ /$var2/;
The above gives this error message:
Invalid  range "3-0" in regex; marked by <-- HERE in m/[B:2013-0 <-- HERE 3]/ at ./sub.pl line 3.
How can I best avoid this problem and get the match to work by ignoring the meta characters?
I know I could escape the  in $var2, like this:
$var2 = '\[B:2013-03\]';
but I'm hoping there's a cleaner way.