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| author | Gurusamy Sarathy <gsar@cpan.org> | 1998-05-14 07:00:02 +0000 |
|---|---|---|
| committer | Gurusamy Sarathy <gsar@cpan.org> | 1998-05-14 07:00:02 +0000 |
| commit | a3cb178b0bad32fa8be934503d051b96a3cb1fea (patch) | |
| tree | bb5ab9c595a9158c059710be33d4e5ff619bf3fc /lib/constant.pm | |
| parent | 43051805d53a3e4c5b2185a17655cab5bedc17ed (diff) | |
| download | perl-a3cb178b0bad32fa8be934503d051b96a3cb1fea.tar.gz | |
[win32] merge changes#872,873 from maintbranch
p4raw-link: @873 on //depot/maint-5.004/perl: 990f469d529b62458be38e8659885fd26d353629
p4raw-link: @872 on //depot/maint-5.004/perl: 0b85608df162729d39cb0f96c9f88c7de0a3ceab
p4raw-id: //depot/win32/perl@935
Diffstat (limited to 'lib/constant.pm')
| -rw-r--r-- | lib/constant.pm | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/constant.pm b/lib/constant.pm index a0d4f9d5cd..464e20cd91 100644 --- a/lib/constant.pm +++ b/lib/constant.pm @@ -106,6 +106,15 @@ name as a constant. This is probably a Good Thing. Unlike constants in some languages, these cannot be overridden on the command line or via environment variables. +You can get into trouble if you use constants in a context which +automatically quotes barewords (as is true for any subroutine call). +For example, you can't say C<$hash{CONSTANT}> because C<CONSTANT> will +be interpreted as a string. Use C<$hash{CONSTANT()}> or +C<$hash{+CONSTANT}> to prevent the bareword quoting mechanism from +kicking in. Similarly, since the C<=E<gt>> operator quotes a bareword +immediately to its left you have to say C<CONSTANT() =E<gt> 'value'> +instead of C<CONSTANT =E<gt> 'value'>. + =head1 AUTHOR Tom Phoenix, E<lt>F<rootbeer@teleport.com>E<gt>, with help from |