/**
* Get next token
* @return PaccToken
*/
public function next()
{
do {
$token = $this->stream->next();
} while (!$token instanceof PaccEndToken && isset($this->out[get_class($token)]));
return $token;
}
/**
* @return array
*/
private function terms()
{
$terms = array();
while ($this->stream->current() instanceof PaccIdToken || $this->stream->current() instanceof PaccStringToken) {
$t = $this->stream->current();
$this->stream->next();
if ($t instanceof PaccIdToken) {
if (ord($t->value[0]) >= 65 && ord($t->value[0]) <= 90) {
// terminal
$term = new PaccTerminal($t->value, $t->value, NULL);
if (($found = $this->terminals->find($term)) !== NULL) {
$term = $found;
} else {
$this->terminals->add($term);
}
} else {
// nonterminal
$term = new PaccNonterminal($t->value);
if (($found = $this->nonterminals->find($term)) !== NULL) {
$term = $found;
} else {
$this->nonterminals->add($term);
}
}
} else {
assert($t instanceof PaccStringToken);
$term = new PaccTerminal($t->value, NULL, $t->value);
if (($found = $this->terminals->find($term)) !== NULL) {
$term = $found;
} else {
$this->terminals->add($term);
}
}
$terms[] = $term;
}
return $terms;
}
