When you use constant Foo . . . , 'Foo' becomes the name of a sub. Inside a regex, you need to use a form which makes the sub be called by evaluation. The \Q is not helping, either. 

while (<>) {
    s/${\NEWLINE()}$//;     # should work
    print;
}

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It looks like you're dealing with foreign line ends, so you might do better to set $/ to CRLF or whatever and chomp.

In a substitute string, the /e modifier would be needed to call the sub.

After Compline,
Zaxo

In reply to Re: substituting constants within regex? by Zaxo
in thread substituting constants within regex? by Anonymous Monk

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