238     public function arity() { return $this->_arity; }  function in AST\\ElementDefinition
245     public function __construct($name, $fixing, $tokenDefs, $priority, $arity=null, $nested=null) {  argument
252         if ($arity === null) {
255                     $arity = 0;
259                     $arity = 1;
262                     $arity = -1;
273         $this->_arity = $arity;
280                 if ($this->arity() != 0) {
288                 if ($this->arity() == 0) {
291                 if (count($this->tokenDefs()) != 1 && count($this->tokenDefs()) != $this->arity()) {
296                 if ($this->arity() == 0) {
299                 if (count($this->tokenDefs()) != 1 && count($this->tokenDefs()) != $this->arity()) {
304                 if ($this->arity() == 0 || $this->arity() == 1) {
307 …           if (count($this->tokenDefs()) != 1 && count($this->tokenDefs()) != $this->arity() - 1) {
312                 if ($this->arity() !== null) {
470                 if ($this->arity() < 0) {
477 …nLength = self::_getLongestAlternateChain($args, $position, $this->tokenDefs()[0], $this->arity());
478                     if ($chainLength == $this->arity()) {
483                     $position = self::_splicePrefix($args, $position, $this->arity(), $this);
488                 if ($this->arity() < 0) {
495 …gth = self::_getLongestAlternateChain($args, $position + 1, $this->tokenDefs()[0], $this->arity());
496                     if ($chainLength == $this->arity()) {
501                     $position = self::_splicePostfix($args, $position + 1, $this->arity(), $this);
506                 if ($this->arity() < 0) {
513 …gth = self::_getLongestAlternateChain($args, $position + 1, $this->tokenDefs()[0], $this->arity());
514                     if ($chainLength == $this->arity() - 1) {
519                     $position = self::_spliceInfix($args, $position + 1, $this->arity() - 1, $this);
622                 if ($this->arity() < 0) { // Any number of tokens, > 0
628                 } elseif (count($args) != $this->arity()) {
629 …w MalformedExpressionException($elmInstance, 'Expected exactly ' . $this->arity() . ' arguments.');