diff options
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 |