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In the old days, you only have this alternative to do it in Perl:

 assert(...) if DEBUG;

where C<DEBUG> is a constant subroutine, declared using:

 use constant DEBUG => 0;

or:

 sub DEBUG() { 0 }

The perl compiler will optimize away and remove the code entirely when C<DEBUG>
is false. But having to add C<if DEBUG> to each assertion is annoying and
error-prone.

Nowadays, you have several alternatives to have a true, C-like assertions. One
technique is using L<Devel::Declare> (e.g. L<PerlX::Assert>). Another technique is
using L<B::CallChecker> (e.g. L<Assert::Conditional>).


=over

=item * L<Assert::Conditional>

=item * L<PerlX::Assert>

=item * L<Devel::Assert>

=back

=head1 HOMEPAGE

Please visit the project's homepage at L<https://metacpan.org/release/Acme-CPANLists-PERLANCAR>.

=head1 SOURCE

Source repository is at L<https://github.com/perlancar/perl-Acme-CPANLists-PERLANCAR>.

=head1 BUGS

Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Acme-CPANLists-PERLANCAR>

When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.

=head1 SEE ALSO

L<Acme::CPANLists> - about the Acme::CPANLists namespace

L<acme-cpanlists> - CLI tool to let you browse/view the lists

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2017, 2016, 2015 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut