Hi Monks

I'm new to perlmonks and seeking your wisdom.

Here's my question...

I have a string such as this –

something in this string is a number. ${=NumberFormat "99999999"} is a number. And another ${=CharFormat "X*"} is ${=NumberFormat "9+"}.

I want to match everything ahead of ${=CharFormat "X*"} up to the first occurrence of '${'. If this literal string '${' does not occur in the rest of the string, then match up to the end. So if, by mistake, the left curly bracket is missing from the last NumberFormat placeholder – i.e. if that placeholder has been written '$=NumberFormat "9+"}' – then match up to the end of the string.

Below is my test perl script that is matching the string between the CharFormat and NumberFormat placeholders, but if I remove the left curly bracket from the NumberFormat placeholder nothing matches.

my $string_exp = 'something in this string is a number. ${=NumberForma
+t "99999999"} is a number. And another ${=CharFormat "X*"} is ${=Numb
+erFormat "9+"}.';
# remove the left curly bracket from the last NumberFormat placeholder
+ in the above string
my $placeholder = '${=CharFormat "X*"}';

print "$string_exp\n";
print "$placeholder\n";

if ( $string_exp =~ m/\Q$placeholder\E(.*)?(\$\{)|\z/ ) {
 print "\"$1\"\n";
}

print "END\n";

[download]

I hope this makes some sense.

Thanks!

In reply to Regex matching next occurrence or to the end of line. by nabeenj

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