Hmmm...

Perhaps I described the problem inadequately. The user of my module creates the file handle. My module exports openOut and it takes a file handle as its first argument in a variable:

sub openOut
  {
    my $file_handle     = $_[0];
    my $output_file     = $_[1];
    ...
  }

[download]
I use that file handle (in variable form - stored in a hash actually) multiple times throughout the module. My module doesn't know the bareword handle name, so I can't directly reference *main::OUT in my module code to "use it twice". Even if I get the name of the bareword file handle with some trick like $bareword_filehandle = select(), I wouldn't guess that I could satisfy the "use it more than once" requirement regarding main without typing the thing out in the code, and if I did that inside the module, I don't know if that would work for the warning about the file handle in main. How does sort do it WRT $a and $b? And how wouyld I replicate that when I don't know the name of the handle?

So... if I put no warnings 'once' inside my openOut sub in my module, are you saying that that would suppress warnings about *OUT (or whatever hard-coded handle the user creates) in main?

Here's a full example of a user's script who would be using my module (we'll call it Foo for now):

#!perl
use Foo qw(openOut);
openOut(*BAR,"~/output.txt");
print("Hello world!\n");

[download]

I do have a feature planned to possibly make the openOut method return an anonymous file handle. That would solve the problem, but it would create other problems, which I haven't worked out yet.

In reply to Re^2: 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
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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