halfcountplus has asked for the wisdom of the Perl Monks concerning the following question:

(My remaining is in bold at the end)

 If I have a module "mine.pm" containing package "thispack" and when used I want it to export method "thisfunc" (without having to use "thispack::thisfunc", how can I do that?

What I tried thus far is:
in the module 
{ package thispack;
use base ("Exporter");
our @EXPORT = ("thisfunc");
  sub thisfunc {

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then in some script 
use mine ("thispack");

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However, calls to "thisfunc" still require the package name. What have I got wrong?


LATER: ahh, it seems the .pm name and the package name have to be the same!
Does that mean I have to put multiple packages in seperate modules??!?

Replies are listed 'Best First'.
Re: how to export methods from module [only partially SOLVED]
by ikegami (Patriarch) on May 03, 2009 at 17:30 UTC

    use does a require and a import. Feel free to just do the later.

    Or, 

    BEGIN {
   package Foo;
   ...
   $INC{"Foo.pm"} = 1;
}

BEGIN {
   package Bar;
   ...
   $INC{"Bar.pm"} = 1;
}

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    use Module qw( );   # Load the file
use Foo qw( ... );  # Import
use Bar qw( ... );  # Import

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Re: how to export methods from module [only partially SOLVED]
by shmem (Chancellor) on May 03, 2009 at 21:42 UTC
    LATER: ahh, it seems the .pm name and the package name have to be the same! Does that mean I have to put multiple packages in seperate modules??!?

    No, and no. But: use does a lookup per file name. Inside a file, the package statement declares a name space. It is highly confusing if the file name and the name space name are not related, or chosen nilly-willy.

    Remember that use Foo is (roughly) equivalent to 

    if (eval "require $package") {
    $package->import(@args);
}

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    If your file is called mine.pm and you use that (use mine;), but inside that file there's a name space mypack established, the use attempts to call mine->import and not mypack->import. There is no facility in Exporter to check which name spaces have been set up by an imported file which wishes to export symbols.

    As for your second question - you may set up multiple name spaces in one file, but only the name space which matches the file name will be handled correctly with Exporter.

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      It is exactly equivalent to
      
       BEGIN { require Module; import Module LIST; }

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Re: how to export methods from module [only partially SOLVED]
by Anonymous Monk on May 03, 2009 at 17:21 UTC
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