The book "Perl Best Practices" (ISBN 0596001738) recommends that you always use braces around the file handle in a print statements to make it clear that you did not forget a comma. This practice would eliminate your problem as well.

Did you consider redirecting your default output with select rather than passing it as an argument?

UPDATE: I believe that the OP is passing a file-handle to a subroutine using the method that his reference (Cookbook recipe 10.7) calls 'Named Parameters'. Using this method, the file-handle is stored as a value in a hash. He as asking for the syntax to use that value in a print statement. AnomalousMonk has provided the answer. My suggestion to use select to pass the file-handle to the subroutine would work, but I no longer recommend it. 

use strict;
use warnings;

myfunction1( handle => \*STDERR);

sub myfunction1{
    my %hash = (
        handle => \*STDOUT,
        @_
    );
    print "something will happen\n";
    print {$hash{handle}}  "anything from myfunction1\n";
#         ^             ^   # braces added here

}

[download]
Bill

In reply to Re: Syntax error when trying to use a hash value as a file stream specifier by BillKSmith
in thread Syntax error when trying to use a hash value as a file stream specifier by fireblood

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