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#!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/.
# Basic tests of sequences.
# The matrix is separation (none/perl5/proper);
# and minimium count (0, 1, 3);
# keep vs. no-keep.
use 5.010001;
use strict;
use warnings;
use Test::More tests => 70;
use lib 'inc';
use Marpa::R2::Test;
use Marpa::R2;
## no critic (Subroutines::RequireArgUnpacking)
sub default_action {
shift;
my $v_count = scalar @_;
return q{} if $v_count <= 0;
return $_[0] if $v_count == 1;
return '(' . join( q{;}, @_ ) . ')';
} ## end sub default_action
## use critic
sub run_sequence_test {
my ( $minimum, $separation, $keep ) = @_;
my @terminals = ('A');
my @separation_args = ();
if ( $separation ne 'none' ) {
push @separation_args, separator => 'sep';
push @terminals, 'sep';
}
if ( $separation eq 'proper' ) {
push @separation_args, proper => 1;
}
my $grammar = Marpa::R2::Grammar->new(
{ start => 'TOP',
rules => [
{ lhs => 'TOP',
rhs => [qw/A/],
min => $minimum,
keep => $keep,
@separation_args
},
],
default_action => 'main::default_action',
}
);
$grammar->set( { terminals => \@terminals } );
$grammar->precompute();
# Number of symbols to test at the higher numbers is
# more or less arbitrary. You really need to test 0 .. 3.
# And you ought to test a couple of higher values,
# say 5 and 10.
SYMBOL_COUNT: for my $symbol_count ( 0, 1, 2, 3, 5, 10 ) {
next SYMBOL_COUNT if $symbol_count < $minimum;
my $test_name =
"min=$minimum;"
. ( $keep ? 'keep;' : q{} )
. ( $separation ne 'none' ? "$separation;" : q{} )
. ";count=$symbol_count";
my $recce = Marpa::R2::Recognizer->new( { grammar => $grammar } );
my @expected = ();
my $last_symbol_ix = $symbol_count - 1;
SYMBOL_IX: for my $symbol_ix ( 0 .. $last_symbol_ix ) {
push @expected, 'a';
$recce->read( 'A', 'a' )
and $recce->exhausted()
and die 'Parsing exhausted';
next SYMBOL_IX if $separation eq 'none';
next SYMBOL_IX
if $symbol_ix >= $last_symbol_ix
and $separation ne 'perl5';
if ($keep) {
push @expected, q{!};
}
$recce->read( 'sep', q{!} )
and $recce->exhausted()
and die 'Parsing exhausted';
} ## end for my $symbol_ix ( 0 .. $last_symbol_ix )
$recce->end_input();
my $value_ref = $recce->value();
my $value = $value_ref ? ${$value_ref} : 'No parse';
my $expected = join q{;}, @expected;
if ( @expected > 1 ) {
$expected = "($expected)";
}
Test::More::is( $value, $expected, $test_name );
} ## end for my $symbol_count ( 0, 1, 2, 3, 5, 10 )
return;
} ## end sub run_sequence_test
for my $minimum ( 0, 1, 3 ) {
run_sequence_test( $minimum, 'none', 0 );
for my $separation (qw(proper perl5)) {
for my $keep ( 0, 1 ) {
run_sequence_test( $minimum, $separation, $keep );
}
}
} ## end for my $minimum ( 0, 1, 3 )
1; # In case used as "do" file
# Local Variables:
# mode: cperl
# cperl-indent-level: 4
# fill-column: 100
# End:
# vim: expandtab shiftwidth=4:
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