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| author | Gurusamy Sarathy <gsar@cpan.org> | 2000-03-13 21:29:15 +0000 |
|---|---|---|
| committer | Gurusamy Sarathy <gsar@cpan.org> | 2000-03-13 21:29:15 +0000 |
| commit | 9f1b1f2d9ab55954ee07a14c4ab04bd3dd1f99d5 (patch) | |
| tree | f3e99c675e49f21e2edc6600cd4c0b10b14c41d5 /pod/perldata.pod | |
| parent | 828c4421567f1da54062ec5edfcc3250be409b16 (diff) | |
| download | perl-9f1b1f2d9ab55954ee07a14c4ab04bd3dd1f99d5.tar.gz | |
lexical warnings update for docs and tests (from Paul Marquess)
p4raw-id: //depot/perl@5712
Diffstat (limited to 'pod/perldata.pod')
| -rw-r--r-- | pod/perldata.pod | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/pod/perldata.pod b/pod/perldata.pod index e3361e4dad..96941bd885 100644 --- a/pod/perldata.pod +++ b/pod/perldata.pod @@ -129,7 +129,8 @@ assignment to an array or hash evaluates the righthand side in list context. Assignment to a list (or slice, which is just a list anyway) also evaluates the righthand side in list context. -When you use Perl's B<-w> command-line option, you may see warnings +When you use the C<use warnings> pragma or Perl's B<-w> command-line +option, you may see warnings about useless uses of constants or functions in "void context". Void context just means the value has been discarded, such as a statement containing only C<"fred";> or C<getpwuid(0);>. It still @@ -366,7 +367,8 @@ A word that has no other interpretation in the grammar will be treated as if it were a quoted string. These are known as "barewords". As with filehandles and labels, a bareword that consists entirely of lowercase letters risks conflict with future reserved -words, and if you use the B<-w> switch, Perl will warn you about any +words, and if you use the C<use warnings> pragma or the B<-w> switch, +Perl will warn you about any such words. Some people may wish to outlaw barewords entirely. If you say |