require "Text::CSV" is much different than require Text::CSV. For your code to work, you'd need to s-::-/-g on $module for the require (but not for the import).

You can also use a lexical. Note that my declarations happen when the statement is compiled but my initializations happen when the statement is run. So: 

use strict;

my $module;
BEGIN {
    $module= ... ? 'Text::CSV' : 'Text::CSV_XS';
    my $file= $module;
    $file =~ s-::-/-g;
    require "$file.pm";
    $module->import();
}

my $csv = $module->new();

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Using eval "use $module" avoids this complication. Which to prefer is mostly a matter of taste (unless there is "risk" of $module ending up containing something strange).

                - tye

In reply to Re^2: using a variable to specify which perl module to use (bareword) by tye
in thread using a variable to specify which perl module to use by princepawn

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