use strict;
use constant {
DESC => 'Mixed high and low-precedence booleans',
EXPL => [70],
};
use constant {
ALPHABETICAL => 1,
NON_ALPHABETICAL => 2,
INVALID => 3,
};
sub evaluate {
my ($class, $file, $tokens, $src, $args) = @_;
my @violations;
my @context_for_each_depth;
my $left_paren_num = 0;
for (my $i = 0, my $token_type; my $token = $tokens->[$i]; $i++) {
$token_type = $token->{type};
if ($token_type == SEMI_COLON) {
if ($left_paren_num <= 0) {
if (my $status = $context_for_each_depth[0]) {
if ($status == INVALID) {
push @violations, {
filename => $file,
line => $token->{line},
description => DESC,
explanation => EXPL,
policy => __PACKAGE__,
};
}
}
@context_for_each_depth = ();
}
}
elsif ($token_type == LEFT_PAREN) {
$left_paren_num++;
}
elsif ($token_type == RIGHT_PAREN) {
if (@context_for_each_depth and my $status = splice @context_for_each_depth, $left_paren_num) {
if ($status == INVALID) {
push @violations, {
filename => $file,
line => $token->{line},
description => DESC,
explanation => EXPL,
policy => __PACKAGE__,
};
}
}
$left_paren_num--;
}
elsif (
$token_type == AND ||
$token_type == OR ||
$token_type == NOT
) {
if (my $context = $context_for_each_depth[$left_paren_num]) {
if ($context != NON_ALPHABETICAL) {
$context_for_each_depth[$left_paren_num] = INVALID;
}
next;
}
$context_for_each_depth[$left_paren_num] = NON_ALPHABETICAL;
}
elsif (
$token_type == ALPHABET_AND ||
$token_type == ALPHABET_OR ||
$token_type == ALPHABET_NOT ||
$token_type == ALPHABET_XOR
) {
if (my $context = $context_for_each_depth[$left_paren_num]) {
if ($context != ALPHABETICAL) {
$context_for_each_depth[$left_paren_num] = INVALID;
}
next;
}
$context_for_each_depth[$left_paren_num] = ALPHABETICAL;
}
}
return \@violations;
}
1;