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$ perl -E 'our $V = q{0.1_1}; $V = eval $V; say $V'
0.11

$ perl -E 'our $V = q{0.11}; say $V'
0.11

sub new {
    my ($class, %attr) = @_;
    ...
}

sub queue {
    my $Q = ref $_[0] eq 'GLOB' ? shift : \*STDOUT;
    my @list = @_;
    ...
}