You have to make it return a true value upon success. eval "use constant CONST1 => 5; 1" or warn $@; I'd suggest not using eval though. You can manually do what the use statement does for you. 
require constant;
constant->import(CONST1 => 5);

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Cheers,
-Anomo

In reply to Re: constant and eval (are they enemies?) by Anonymous Monk
in thread constant and eval (are they enemies?) by tune

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