Read use/require/import and you will understand that you cannot write if(something){use somethin; } because use happens always, at compile time 

use SOAP::Lite;
if( $debug ){ SOAP::Lite->import( trace => 'debug ' ); }

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In reply to Re: defined weirdness (use happens at compile time) by Anonymous Monk
in thread defined weirdness by natxo

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