Do you mean sv_yes or sv_no (which has PV "" and IV 0)? Or the very few things that actually return either "" or 0 instead of sv_no? IIRC correctly, there are good reasons for those odd cases.

In reply to Re^7: Better expression for $x = !!$y||0 by ysth
in thread Better expression for $x = !!$y||0 by borisz

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