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#!/usr/bin/perl
# Copyright 2014 Jeffrey Kegler
# This file is part of Marpa::R2. Marpa::R2 is free software: you can
# redistribute it and/or modify it under the terms of the GNU Lesser
# General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.
#
# Marpa::R2 is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser
# General Public License along with Marpa::R2. If not, see
# http://www.gnu.org/licenses/.
# Tests of the sequence in the Marpa::R2::Grammar doc
use 5.010;
use strict;
use warnings;
use Fatal qw(open close);
use Test::More tests => 3;
use lib 'inc';
use Marpa::R2::Test;
use Marpa::R2;
sub do_sequence { shift; return 'seq(' . ( join q{;}, @_ ) . ')' }
sub do_item { shift; return 'item(' . ( join q{;}, @_ ) . ')' }
my $grammar;
my $recce;
my $value_ref;
my $value;
my $min0 =
#<<< no perltidy
# Marpa::R2::Display
# name: Marpa::R2::Grammar min 0 sequence example
{ lhs => 'sequence', rhs => ['item'], min => 0, action => 'do_sequence' }
# Marpa::R2::Display::End
; # semicolon to terminate rule
$grammar = Marpa::R2::Grammar->new(
{ start => 'sequence',
terminals => [qw(item)],
rules => [$min0],
actions => 'main'
}
);
$grammar->precompute();
$recce = Marpa::R2::Recognizer->new( { grammar => $grammar } );
$recce->read( 'item', '0');
$recce->read( 'item', '1');
$value_ref = $recce->value();
$value = $value_ref ? ${$value_ref} : 'No Parse';
$value //= 'undef returned';
Marpa::R2::Test::is( $value, 'seq(0;1)', 'min 0 value' );
my $min1 =
#<<< no perltidy
# Marpa::R2::Display
# name: Marpa::R2::Grammar min 1 sequence example
{ lhs => 'sequence', rhs => ['item'], min => 1, action => 'do_sequence' }
# Marpa::R2::Display::End
; # semicolon to terminate rule
$grammar = Marpa::R2::Grammar->new({
start => 'sequence',
rules => [ $min1 ],
actions => 'main'
});
$grammar->precompute();
$recce = Marpa::R2::Recognizer->new( { grammar => $grammar } );
$recce->read( 'item', '0');
$recce->read( 'item', '1');
$value_ref = $recce->value();
$value = $value_ref ? ${$value_ref} : 'No Parse';
$value //= 'undef returned';
Marpa::R2::Test::is( $value, 'seq(0;1)', 'min 1 value' );
my $multipart = [
#<<< no perltidy
# Marpa::R2::Display
# name: Marpa::R2::Grammar multipart rhs sequence example
{ lhs => 'sequence', rhs => [qw(item)], min => 0, action => 'do_sequence' },
{ lhs => 'item', rhs => [qw(part1 part2)], action => 'do_item' },
# Marpa::R2::Display::End
]; # semicolon to terminate rule
$grammar = Marpa::R2::Grammar->new(
{ start => 'sequence',
terminals => [qw(part1 part2)],
rules => $multipart,
actions => 'main'
}
);
$grammar->precompute();
$recce = Marpa::R2::Recognizer->new( { grammar => $grammar } );
$recce->read( 'part1', '0' );
$recce->read( 'part2', '1' );
$value_ref = $recce->value();
$value = $value_ref ? ${$value_ref} : 'No Parse';
$value //= 'undef returned';
Marpa::R2::Test::is( $value, 'seq(item(0;1))', 'multipart rhs value' );
1; # In case used as "do" file
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4:
|
