I was noticing in some module libraries, the caller was required to use Library::This and use Library::That separately. Other libraries had a "meta" module which would have the effect of importing all of the others for you in one simple use Library statement.

Normally, if a package uses some other module, the symbols are only imported for the package's use. With the caller function, a crafty meta-package can emulate the use statements on behalf of the main script. This can make the Library more friendly to use and document.

package Library;
    ...
sub import
{
    my $calling = (caller())[0];
    eval qq{
        # Load these on behalf of the calling package.
        package $calling;
        use Library::This;
        use Library::That;
        use Library::TheOther::Thing;
    };
    die $@ if $@;
}

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In reply to Meta Module imports several packages by halley

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