1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
#!perl
# Copyright 2022 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/.
# The low-level ASF synopses and related tests
use 5.010001;
use strict;
use warnings;
use Test::More tests => 1;
use English qw( -no_match_vars );
use lib 'inc';
use Marpa::R2::Test;
use Marpa::R2;
use Data::Dumper;
use Scalar::Util;
# Marpa::R2::Display
# name: ASF low-level calls synopsis, code part 1
my $grammar = Marpa::R2::Scanless::G->new(
{ source => \(<<'END_OF_SOURCE'),
:start ::= pair
pair ::= duple | item item
duple ::= item item
item ::= Hesperus | Phosphorus
Hesperus ::= 'a'
Phosphorus ::= 'a'
END_OF_SOURCE
}
);
my $slr = Marpa::R2::Scanless::R->new( { grammar => $grammar } );
$slr->read( \'aa' );
my $asf = Marpa::R2::ASF->new( { slr => $slr } );
die 'No ASF' if not defined $asf;
my $output_as_array = asf_to_basic_tree($asf);
my $actual_output = array_display($output_as_array);
# Marpa::R2::Display::End
# Marpa::R2::Display
# name: ASF low-level calls synopsis, output
# start-after-line: EXPECTED_OUTPUT
# end-before-line: '^EXPECTED_OUTPUT$'
my $expected_output = <<'EXPECTED_OUTPUT';
Glade 2 has 2 symches
Glade 2, Symch 0, pair ::= duple
Glade 6, duple ::= item item
Glade 8 has 2 symches
Glade 8, Symch 0, item ::= Hesperus
Glade 13, Hesperus ::= 'a'
Glade 15, Symbol 'a': "a"
Glade 8, Symch 1, item ::= Phosphorus
Glade 1, Phosphorus ::= 'a'
Glade 17, Symbol 'a': "a"
Glade 7 has 2 symches
Glade 7, Symch 0, item ::= Hesperus
Glade 22, Hesperus ::= 'a'
Glade 24, Symbol 'a': "a"
Glade 7, Symch 1, item ::= Phosphorus
Glade 9, Phosphorus ::= 'a'
Glade 26, Symbol 'a': "a"
Glade 2, Symch 1, pair ::= item item
Glade 8 revisited
Glade 7 revisited
EXPECTED_OUTPUT
# Marpa::R2::Display::End
Marpa::R2::Test::is( $actual_output, $expected_output,
'Output for basic ASF synopsis' );
# Marpa::R2::Display
# name: ASF low-level calls synopsis, code part 2
sub asf_to_basic_tree {
my ( $asf, $glade ) = @_;
my $peak = $asf->peak();
return glade_to_basic_tree( $asf, $peak, [] );
} ## end sub asf_to_basic_tree
sub glade_to_basic_tree {
my ( $asf, $glade, $seen ) = @_;
return bless ["Glade $glade revisited"], 'My_Revisit'
if $seen->[$glade];
$seen->[$glade] = 1;
my $grammar = $asf->grammar();
my @symches = ();
my $symch_count = $asf->glade_symch_count($glade);
SYMCH: for ( my $symch_ix = 0; $symch_ix < $symch_count; $symch_ix++ ) {
my $rule_id = $asf->symch_rule_id( $glade, $symch_ix );
if ( $rule_id < 0 ) {
my $literal = $asf->glade_literal($glade);
my $symbol_id = $asf->glade_symbol_id($glade);
my $display_form = $grammar->symbol_display_form($symbol_id);
push @symches,
bless [qq{Glade $glade, Symbol $display_form: "$literal"}],
'My_Token';
next SYMCH;
} ## end if ( $rule_id < 0 )
# ignore any truncation of the factorings
my $factoring_count =
$asf->symch_factoring_count( $glade, $symch_ix );
my @symch_description = ("Glade $glade");
push @symch_description, "Symch $symch_ix" if $symch_count > 1;
push @symch_description, $grammar->rule_show($rule_id);
my $symch_description = join q{, }, @symch_description;
my @factorings = ($symch_description);
for (
my $factor_ix = 0;
$factor_ix < $factoring_count;
$factor_ix++
)
{
my $downglades =
$asf->factoring_downglades( $glade, $symch_ix,
$factor_ix );
push @factorings,
bless [ map { glade_to_basic_tree( $asf, $_, $seen ) }
@{$downglades} ], 'My_Rule';
} ## end for ( my $factor_ix = 0; $factor_ix < $factoring_count...)
if ( $factoring_count > 1 ) {
push @symches,
bless [
"Glade $glade, symch $symch_ix has $factoring_count factorings",
@factorings
],
'My_Factorings';
next SYMCH;
} ## end if ( $factoring_count > 1 )
push @symches, bless [ @factorings[ 0, 1 ] ], 'My_Factorings';
} ## end SYMCH: for ( my $symch_ix = 0; $symch_ix < $symch_count; ...)
return bless [ "Glade $glade has $symch_count symches", @symches ],
'My_Symches'
if $symch_count > 1;
return $symches[0];
} ## end sub glade_to_basic_tree
# Marpa::R2::Display::End
# Marpa::R2::Display
# name: ASF low-level calls synopsis, code part 3
sub array_display {
my ($array) = @_;
my ( undef, @lines ) = @{ array_lines_display($array) };
my $text = q{};
for my $line (@lines) {
my ( $indent, $body ) = @{$line};
$indent -= 6;
$text .= ( q{ } x $indent ) . $body . "\n";
}
return $text;
} ## end sub array_display
sub array_lines_display {
my ($array) = @_;
my $reftype = Scalar::Util::reftype($array) // '!undef!';
return [ [ 0, $array ] ] if $reftype ne 'ARRAY';
my @lines = ();
ELEMENT: for my $element ( @{$array} ) {
for my $line ( @{ array_lines_display($element) } ) {
my ( $indent, $body ) = @{$line};
push @lines, [ $indent + 2, $body ];
}
} ## end ELEMENT: for my $element ( @{$array} )
return \@lines;
} ## end sub array_lines_display
# Marpa::R2::Display::End
# vim: expandtab shiftwidth=4:
|
