NAME Acme::CPANModules::Assert - Assertion VERSION This document describes version 0.001 of Acme::CPANModules::Assert (from Perl distribution Acme-CPANModules-Assert), released on 2019-01-09. DESCRIPTION Assertion. Assertion is a check statement that must evaluate to true or it will abort program's execution. It is useful during development/debugging: assert("there must be >3 arguments", sub { @args > 3 }); In production code, compilers ideally do not generate code for assertion statements so they do not have any impact on runtime performance. In the old days, you only have this alternative to do it in Perl: assert(...) if DEBUG; where "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 "DEBUG" is false. But having to add "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 Devel::Declare (e.g. PerlX::Assert). Another technique is using B::CallChecker (e.g. Assert::Conditional). INCLUDED MODULES * Assert::Conditional * PerlX::Assert * Devel::Assert HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS Please report any bugs or feature requests on the bugtracker website 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. SEE ALSO Acme::CPANModules - about the Acme::CPANModules namespace cpanmodules - CLI tool to let you browse/view the lists AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2019 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.