#!perl
# Marpa::R3 is Copyright (C) 2016, Jeffrey Kegler.
#
# This module is free software; you can redistribute it and/or modify it
# under the same terms as Perl 5.10.1. For more details, see the full text
# of the licenses in the directory LICENSES.
#
# This program is distributed in the hope that it will be
# useful, but it is provided “as is” and without any express
# or implied warranties. For details, see the full text of
# of the licenses in the directory LICENSES.
# CENSUS: ASIS
# Note: SLIF TEST
use 5.010001;
# A variation on
# the example grammar in Aycock/Horspool "Practical Earley Parsing",
# _The Computer Journal_, Vol. 45, No. 6, pp. 620-630,
# Its order of ambiguity generates Pascal's triangle.
use strict;
use warnings;
use Test::More tests => 10;
use lib 'inc';
use Marpa::R3::Test;
use Marpa::R3;
my $n = 10;
my $dsl = <<'=== END_OF_DSL ===';
sequence ::= A action => main::one
| A sequence action => main::add
A ::= 'a' action => main::one
=== END_OF_DSL ===
sub one { return 1 }
sub add {
my ( undef, $values ) = @_;
my ( $left, $right ) = @{$values};
return $left + $right;
}
my $grammar = Marpa::R3::Scanless::G->new( { source => \$dsl } );
my $recce = Marpa::R3::Scanless::R->new( { grammar => $grammar } );
my $input = 'a' x $n;
$recce->read( \$input, 0, 0 );
my @parse_counts = (1);
for my $loc ( 1 .. $n ) {
my $parse_number = 0;
$recce->series_restart();
$recce->resume( undef, 1 );
die "No parse" if not my $value_ref = $recce->value();
local $Data::Dumper::Deepcopy = 1;
# say STDERR Data::Dumper::Dumper($value_ref);
my $actual = ${$value_ref};
Marpa::R3::Test::is( $actual, $loc,
"Count $loc of incremental read" );
} ## end for my $loc ( 1 .. $n )
1; # In case used as "do" file
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: set expandtab shiftwidth=4: