I agree with all three replies you've received to this so far. I would also add (my anonymous brother's comment notwithstanding) that you can avoid this problem entirely simply by returning the opened filehandle rather than accepting it as an argument. eg. In your module:

sub openOut {
    my $filename = shift;
    open my $fh, '>', $filename or die $!;
    select $fh;
    return $fh;
};

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In this way, the user of your module can either call this sub in void context if they don't care about closing the handle later (this avoiding the "once" warning) or in scalar context if they do. eg:

# void context, no handle to close
openOut ("file1");
print "foo\n";

# scalar context, handle stored so can be closed, printed to explicitl
+y, etc.
my $handle = openOut ("file2");
print "bar\n";
closeOut ($handle);

[download]

In reply to Re^3: How to suppress "only used once" regarding script file handles (that are in fact used in my module), but do it from a the module? by hippo
in thread How to suppress "only used once" regarding script file handles (that are in fact used in my module), but do it from a the module? by hepcat72

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