G'day three18ti,
In the absence of seeing a context requiring anything more complex, I'd probably code something along these lines:
#!/usr/bin/env perl
use strict;
use warnings;
my $re = qr{^(.*)(?<![\\])[\\]\n$};
my $line = '';
while (<DATA>) {
if (/$re/) {
$line .= $1;
next;
}
$line .= $_;
print $line;
$line = '';
}
__DATA__
Line 1 Part A \
Line 1 Part B \
Line 1 Part C
Line 2 ALL
Line 3 Part X \
Line 3 Part Y
Line 4 END WITH BACKSLASH \\
Line 5 LAST Z
Output:
Line 1 Part A Line 1 Part B Line 1 Part C
Line 2 ALL
Line 3 Part X Line 3 Part Y
Line 4 END WITH BACKSLASH \\
Line 5 LAST Z
That code could easily be adapted for an iterator if one is required for your application.
If you're not familiar with negative look-behind assertions ((?<!pattern)),
they're documented under Look-Around Assertions in
"perlre: Extended Patterns".
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