NAME

DESCRIPTION

    ! $x =~ /^[123]/  # bad
    ! $x + $y >= $z   # bad

In each case precedence means Perl parses this as "(!$x)", like

    (! $x) =~ /^[123]/
    (! $x) + $y >= $z

rather than a negated comparison. Usually this is a mistake, so this policy is under the "bugs" theme (see "POLICY THEMES" in Perl::Critic).

As a special case, "!" on both sides of "==" or "!=" is allowed, since it's quite a good way to compare booleans.

    !$x == !$y   # ok
    !$x != !$y   # ok

LIMITATIONS

    ! userfunc $x == 123   # indeterminate
    # without prototype would be ok:   ! (userfunc ($x==123))
    # with ($) prototype would be bad: (! userfunc($x)) == 123

Perl builtins with no args, and constant subs created with "use constant" or "sub FOO () {...}" in the file under test are recognised. Hopefully anything else too weird is rare.

    ! time == 1   # bad

    use constant FIVE => 5;
    ! FIVE < 1    # bad

    sub name () { "foo" }
    ! name =~ /bar/    # bad

SEE ALSO

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COPYRIGHT

Perl-Critic-Pulp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Perl-Critic-Pulp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Perl-Critic-Pulp. If not, see <http://www.gnu.org/licenses/>.