NAME

Perl::Critic::Policy::ControlStructures::ProhibitUntilBlocks - Write while(! $condition) instead of until($condition).

AFFILIATION

This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

Conway discourages using until because it leads to double-negatives that are hard to understand. Instead, reverse the logic and use while.

    until($condition)     { do_something() } #not ok
    until(! $no_flag)     { do_something() } #really bad
    while( ! $condition)  { do_something() } #ok

This Policy only covers the block-form of until. For the postfix variety, see ProhibitPostfixControls.

CONFIGURATION

This Policy is not configurable except for the standard options.

AUTHOR

Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license can be found in the LICENSE file included with this module.

Perl::Critic::Policy::ControlStructures::ProhibitUntilBlocks - Write C instead of C.