/**
* Constructor.
*
* @param \Dissect\Parser\Rule $rule The conflicting grammar rule.
* @param string $lookahead The conflicting lookahead to shift.
* @param \Dissect\Parser\LALR1\Analysis\Automaton $automaton The faulty automaton.
*/
public function __construct($state, Rule $rule, $lookahead, Automaton $automaton)
{
$components = $rule->getComponents();
parent::__construct(sprintf(self::MESSAGE, $rule->getNumber(), $rule->getName(), empty($components) ? '/* empty */' : implode(' ', $components), $lookahead, $state), $state, $automaton);
$this->rule = $rule;
$this->lookahead = $lookahead;
}
/**
* Sets the callback for the current rule.
*
* @param callable $callback The callback.
*
* @return \Dissect\Parser\Grammar This instance.
*/
public function call($callback)
{
if ($this->currentRule === null) {
throw new LogicException('You must specify a rule first.');
}
$this->currentRule->setCallback($callback);
return $this;
}
/**
* @test
*/
public function getComponentShouldReturnNullIfAskedForComponentOutOfRange()
{
$r = new Rule(1, 'Foo', array('x', 'y'));
$this->assertEquals('y', $r->getComponent(1));
$this->assertNull($r->getComponent(2));
}
/**
* Returns all components that haven't been recognized
* so far.
*
* @return array The unrecognized components.
*/
public function getUnrecognizedComponents()
{
return array_slice($this->rule->getComponents(), $this->dotIndex + 1);
}