diff options
| author | david nicol <whatever@davidnicol.com> | 2004-08-27 16:13:42 -0500 |
|---|---|---|
| committer | Dave Mitchell <davem@fdisolutions.com> | 2004-09-01 20:46:13 +0000 |
| commit | fd1abbef24b103836b91c31da66323dac8ca6b23 (patch) | |
| tree | 54367f1aa8dd0aca4f89f3a69f9078e7fd98759d /pod/perlop.pod | |
| parent | d4797c1db270629c34a4328ed9f62ec5d7a6003c (diff) | |
| download | perl-fd1abbef24b103836b91c31da66323dac8ca6b23.tar.gz | |
[perl #31228] no no-op
Message-Id: 1093659222.1436.70.camel@plaza.davidnicol.com>
Document that 0 and 1 can (sort of) be used as no-ops.
p4raw-id: //depot/perl@23250
Diffstat (limited to 'pod/perlop.pod')
| -rw-r--r-- | pod/perlop.pod | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/pod/perlop.pod b/pod/perlop.pod index 64206ceea8..6185c686e0 100644 --- a/pod/perlop.pod +++ b/pod/perlop.pod @@ -2059,6 +2059,14 @@ you say the compiler will precompute the number which that expression represents so that the interpreter won't have to. +=head2 No-ops + +Perl doesn't officially have a no-op operator, but the bare constants +C<0> and C<1> are special-cased to not produce a warning in a void +context, so you can for example safely do + + 1 while foo(); + =head2 Bitwise String Operators Bitstrings of any size may be manipulated by the bitwise operators |