cperl indentation question

[mgwmgw]

I have been using emacs since the 1980's,
and I am doing perl development using cperl mode.
The coding style rules where I work require that lines of source are less
than 80 characters wide.
Also, if I have a perl command like this
my $variable = "very long string"
.  " another very long string";
The continuation "." should line up under the double quote at the beginning
of the first line.
If I have a function/sub call
function("very long string"
            . " another very long string");
this lines up just fine,
but I have not figured out how to line this up without parens.
Any ideas?





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