Re: Can I retry "use" when module load fails?

[Athanasius]

From the documentation for use:

use Module LIST ... is exactly equivalent to

BEGIN { require Module; Module->import( LIST ); }

So, simply convert any use statements that might fail into the equivalent require statements, and your strategy of testing them dynamically using eval will then work OK.

(BTW, there should be no need to test the pragmas use strict and use warnings in this way.)

Hope that helps,

[exilepanda]

Thanks answering!! However I ran in another problem, simplified as follow. Say that I have a module CommonPiece

package CommonPiece;
require Exporter;
our @ISA =qw/Exporter/;
our @EXPORT =qw/htmlStyle/;

sub htmlStyle {
  print "<style>...</style>";
}
1;
__END__

Now in main

use CommonPiece;
htmlStyle; # this works

However, if I change to :

BEGIN {
  require CommonPiece;
}

htmlStyle; 
#Undefined subroutine &main::htmlStyle called at /...path/

What did I missed?

[NetWallah]

You missed the "import" part noted in Athanasius's post.

[exilepanda]

I noticed... but why? I have nothing to do with import. I already used Exporter to export my stuffs. so if use is identical to BEGIN {require...}, then that should be no problem sub import{} never existed in my module, and then I won't call it. What's the difference?