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    else {
        $pkg = (caller)[0];
        %args = @_;
    }
    my %Gargs;
    $Gargs{ bless_package } = delete $args{ bless_package } if $args{ bless_package };
    $Gargs{ trace_file_handle } = $args{ trace_file_handle } if $args{ trace_file_handle };
    $ebnf //= delete $args{ source };
    $ebnf = $$ebnf if ref($ebnf);
    my $G = Marpa::R2::Scanless::G->new({ source => \$ebnf, %Gargs });
    return bless [ $G, $pkg, \%args ] => $class;
}

sub parse {
    my ($grammar, $string) = @_;
    my $R = Marpa::R2::Scanless::R->new({ grammar => $grammar->[ 0 ], semantics_package => $grammar->[ 1 ], %{$grammar->[ 2 ]} });
    $R->read(\$string);
    my $V = $R->value or return;
    return $$V;
}