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| author | Mike Guy <mjtg@cam.ac.uk> | 2002-09-26 14:20:45 +0100 |
|---|---|---|
| committer | hv <hv@crypt.org> | 2002-10-02 13:43:26 +0000 |
| commit | 2cdc098b0ca3aa6472d96981cd6e2bbef5e34f6a (patch) | |
| tree | 7ce6f4e53e0795671c4b687c65109bf490f7293e /pod | |
| parent | 97828cef4d4cd22b548b8ec430d2e0e28ea8ae8c (diff) | |
| download | perl-2cdc098b0ca3aa6472d96981cd6e2bbef5e34f6a.tar.gz | |
add precedence warning for bitwise docs
Subject: [PATCH] Bug in ARM's floating point emulation - Need someone, really...
Message-Id: <E17uXdN-0003ko-00@libra.cus.cam.ac.uk>
p4raw-id: //depot/perl@17955
Diffstat (limited to 'pod')
| -rw-r--r-- | pod/perlop.pod | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/pod/perlop.pod b/pod/perlop.pod index 8af2d5b93b..9bce6c26cc 100644 --- a/pod/perlop.pod +++ b/pod/perlop.pod @@ -336,17 +336,27 @@ by the current locale if C<use locale> is in effect. See L<perllocale>. =head2 Bitwise And -Binary "&" returns its operators ANDed together bit by bit. +Binary "&" returns its operands ANDed together bit by bit. (See also L<Integer Arithmetic> and L<Bitwise String Operators>.) +Note that "&" has lower priority than relational operators, so for example +the brackets are essential in a test like + + print "Even\n" if ($x & 1) == 0; + =head2 Bitwise Or and Exclusive Or -Binary "|" returns its operators ORed together bit by bit. +Binary "|" returns its operands ORed together bit by bit. (See also L<Integer Arithmetic> and L<Bitwise String Operators>.) -Binary "^" returns its operators XORed together bit by bit. +Binary "^" returns its operands XORed together bit by bit. (See also L<Integer Arithmetic> and L<Bitwise String Operators>.) +Note that "|" and "^" have lower priority than relational operators, so +for example the brackets are essential in a test like + + print "false\n" if (8 | 2) != 10; + =head2 C-style Logical And Binary "&&" performs a short-circuit logical AND operation. That is, |