Perl::Critic::Policy::Modules::ProhibitPOSIXimport3pm

Allowed Forms

A full import is allowed in "package main", which is the top-level of a script etc, since in a script you want convenience rather than a bit of memory, at least initially.

    #!/usr/bin/perl
    use POSIX;        # ok

An import of no symbols is allowed and you then add a "POSIX::" qualifier to each call or constant. Qualifiers like this can make it clear where the function is coming from.

    package Foo;
    use POSIX (); # ok
    my $fd = POSIX::dup(0);
    if ($! == POSIX::ENOENT())

An import of an explicit set of functions and constants is allowed. This allows short names without the memory penalty of a full import. However it can be error-prone to update the imports with what you actually use (see "ProhibitCallsToUndeclaredSubs" for some checking).

    package Foo;
    use POSIX qw(dup ENOENT); # ok
    ...
    my $fd = dup(0);

A full import is allowed in a module if there's 15 or more calls to "POSIX" module functions. This rule might change or be configurable in the future, but the intention is that a module making heavy use of "POSIX" shouldn't be burdened by a "POSIX::" on every call or by maintaining a list of explicit imports.

    package Foo;
    use POSIX;         # ok
    ...
    tzset(); dup(1)... # 15 or more calls to POSIX stuff

Disabling

If you don't care this sort of thing you can always disable "ProhibitPOSIXimport" from your .perlcriticrc in the usual way (see "CONFIGURATION" in Perl::Critic),

    [-Modules::ProhibitPOSIXimport]