diff options
| author | Dan Book <grinnz@grinnz.com> | 2020-04-01 13:04:35 -0400 |
|---|---|---|
| committer | Karl Williamson <khw@cpan.org> | 2020-04-01 14:06:34 -0600 |
| commit | 45f87e658628cd0ee4595d39ffbf774a44c72a1f (patch) | |
| tree | c9139a9d7ca02e268e28cafbacc10d12efcfb36a /regen | |
| parent | 5de22a40933c620b62e1f431457593777b99793d (diff) | |
| download | perl-45f87e658628cd0ee4595d39ffbf774a44c72a1f.tar.gz | |
warnings.pm - Clarify scoping of $^W examples
Diffstat (limited to 'regen')
| -rw-r--r-- | regen/warnings.pl | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/regen/warnings.pl b/regen/warnings.pl index 6000c759ef..9fbf607d7a 100644 --- a/regen/warnings.pl +++ b/regen/warnings.pl @@ -16,7 +16,7 @@ # # This script is normally invoked from regen.pl. -$VERSION = '1.46'; +$VERSION = '1.47'; BEGIN { require './regen/regen_lib.pl'; @@ -1012,6 +1012,10 @@ disable compile-time warnings you need to rewrite the code like this: my $b; chop $b; } +And note that unlike the first example, this will permanently set C<$^W> +since it cannot both run during compile-time and be localized to a +run-time block. + The other big problem with C<$^W> is the way you can inadvertently change the warning setting in unexpected places in your code. For example, when the code below is run (without the B<-w> flag), the second call |