use strict;
use constant {
DESC => 'Lvalue form of "substr" used',
EXPL => [165],
};
sub evaluate {
my ($class, $file, $tokens, $src, $args) = @_;
my @violations;
for (my $i = 0; my $token = $tokens->[$i]; $i++) {
my $token_type = $token->{type};
my $token_data = $token->{data};
if ($token_type == BUILTIN_FUNC && $token_data eq 'substr') {
$token = $tokens->[++$i];
if ($token->{type} == LEFT_PAREN) {
my $left_paren_num = 1;
for ($i++; my $token = $tokens->[$i]; $i++) {
$token = $tokens->[++$i];
$token_type = $token->{type};
if ($token_type == LEFT_PAREN) {
$left_paren_num++;
}
elsif ($token_type == RIGHT_PAREN) {
if (--$left_paren_num <= 0) {
my $next_token = $tokens->[++$i];
if ($next_token->{type} == ASSIGN) {
push @violations, {
filename => $file,
line => $token->{line},
description => DESC,
explanation => EXPL,
policy => __PACKAGE__,
};
}
last;
}
}
}
}
}
elsif ($token_type == USE_DECL) {
$token = $tokens->[++$i];
if ($token->{type} == DOUBLE) {
($token_data = $token->{data}) =~ s/_//g;
if ($token_data <= 5.004) {
return [];
}
}
}
}
return \@violations;
}
1;