#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };
use Syntax::Construct qw{ // };


{   package Array::Nonempty;

    use Tie::Array;
    use parent -norequire => 'Tie::StdArray';
    use Carp;

    sub CLEAR {
        my $self = shift;
        $self->[0] = [];
    }

    sub TIEARRAY {
        my ($class, $untie) = @_;
        bless [ [], $untie ], $class
    }

    sub EXTEND {
        my ($self, $size) = @_;
        croak "Cannot be empty" if 0 == @{ $self->[0] } && 0 == $size;
        $self->SUPER::EXTEND($size);

        # Prevent "untie attempted while 1 inner references still exist"
        my $untie = $self->[1];
        undef $self;

        untie @$untie;
    }

}


{   package UNIVERSAL;
    use Attribute::Handlers autotieref => { Nonempty => 'Array::Nonempty' };
}

my @list = 1 .. 5;

for (1 .. 10) {
    my @check :Nonempty = @list;
    shift @list;
    say tied(@check) // 'not tied';
    say "@check";
}


##</code><code>##

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,