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Re^2: Why no warnings for 1 in void context?

by tlm (Prior)
on Jul 17, 2005 at 12:58 UTC ( #475559=note: print w/replies, xml ) Need Help??

in reply to Re: Why no warnings for 1 in void context?
in thread Why no warnings for 1 in void context?

Actually, the same is true of zero:

% perl -wce 0 -e syntax OK

Yes, thank you, and also of undef and (), and of any list whose elements are the scalars already identified; e.g.:

% perl -wce '( 1, 0, undef, , "di foo", "ds bar", "ig baz" )' -e syntax OK

Given dave_the_m's explanation above, is this to allow:

0 until ....

Reading between the lines, I gather that you are attaching some significance to the boolean value of the constant in question. I did too on a first reading, but then I realized that it is the boolean value of what follows the while or until that matters. I.e.,

1 while some_condition_with_side_effects;
has the same effect as
0 while some_condition_with_side_effects;

the lowliest monk

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