| 1 | package subs; |
| 2 | |
| 3 | =head1 NAME |
| 4 | |
| 5 | subs - Perl pragma to predeclare sub names |
| 6 | |
| 7 | =head1 SYNOPSIS |
| 8 | |
| 9 | use subs qw(frob); |
| 10 | frob 3..10; |
| 11 | |
| 12 | =head1 DESCRIPTION |
| 13 | |
| 14 | This will predeclare all the subroutine whose names are |
| 15 | in the list, allowing you to use them without parentheses |
| 16 | even before they're declared. |
| 17 | |
| 18 | Unlike pragmas that affect the C<$^H> hints variable, the C<use vars> and |
| 19 | C<use subs> declarations are not BLOCK-scoped. They are thus effective |
| 20 | for the entire file in which they appear. You may not rescind such |
| 21 | declarations with C<no vars> or C<no subs>. |
| 22 | |
| 23 | See L<perlmodlib/Pragmatic Modules> and L<strict/strict subs>. |
| 24 | |
| 25 | =cut |
| 26 | |
| 27 | require 5.000; |
| 28 | |
| 29 | sub import { |
| 30 | my $callpack = caller; |
| 31 | my $pack = shift; |
| 32 | my @imports = @_; |
| 33 | foreach $sym (@imports) { |
| 34 | *{"${callpack}::$sym"} = \&{"${callpack}::$sym"}; |
| 35 | } |
| 36 | }; |
| 37 | |
| 38 | 1; |