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lib/B/CompilerPhase/Hook.pm  view on Meta::CPAN

      enqueue_BEGIN     { print " 2. So this line comes out second.\n" }
      enqueue_UNITCHECK { print " 3. UNITCHECK blocks run LIFO after each file is compiled.\n" }
      enqueue_INIT      { print " 9. You'll see the difference right away.\n" }
  }
  print                         "13.   It only _looks_ like it should be confusing.\n";

  # With apologies to the `BEGIN-UNITCHECK-CHECK-INIT-and-END` section of `perlmod`

=head1 DESCRIPTION

This module makes it possible to enqueue callbacks to be run during
the various Perl compiler phases, with the aim of doing multi-phase
meta programming in a reasonably clean way.

=head1 FUNCTIONS

These functions either C<push> or C<unshift> onto the respective internal
arrays for that phase. The distinction is there to preserve the FIFO and
LIFO patterns already inherent in the built-in form of compiler phase
hooks.

lib/B/CompilerPhase/Hook.pm  view on Meta::CPAN

what you are doing. For most cases you can just use the C<enqueue>
variants above and all will be well.

=head1 SEE ALSO

=over 4

=item L<Devel::Hook>

This module provides C<push> and C<unshift> access to the internal
arrays that hold the set of compiler phase callbacks. It relies on
you to do the right thing when choosing which of the two actions
(C<push> or C<unshift>) to take.

=back

=head1 AUTHOR

Stevan Little <stevan@cpan.org>

=head1 COPYRIGHT AND LICENSE