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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
RRP £29.95 ($39.95)

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Possible precedence problem on bitwise %c operator

(W precedence) Your program uses a bitwise logical operator in conjunction with a numeric comparison operator, like this :

if ($x & $y == 0) { ... }

This expression is actually equivalent to $x & ($y == 0), due to the higher precedence of ==. This is probably not what you want. (If you really meant to write this, disable the warning, or, better, put the parentheses explicitly and write $x & ($y == 0)).

ISBN 9781906966027Perl Language Reference ManualSee the print edition