1: <?php
 2: 
 3: namespace BN\Compiler\Parser;
 4: 
 5: use BN\Compiler\Token\TokenType;
 6: 
 7: class StackCleaning
 8: {
 9:     private $accumulator;
10: 
11:     public function __construct(QueueAccumulator $accumulator)
12:     {
13:         $this->accumulator = $accumulator;
14:     }
15: 
16:     public function pushOperatorsFromStack()
17:     {
18:         while (!$this->accumulator->isStackEmpty()) {
19:             if ($this->accumulator->isOperatorAtTopOfStack()) {
20:                 $this->accumulator->pushTokenFromStackToQueue();
21:             } elseif ($this->isBracketAtTopOfStack()) {
22:                 $bracket = $this->accumulator->valueAtStackPeek();
23:                 $this->accumulator->stopParsing('mismatchedBrackets', $bracket);
24:                 return;
25:             }
26:         }
27:     }
28: 
29:     private function isBracketAtTopOfStack()
30:     {
31:         return $this->accumulator->isTypeAtStackPeek(TokenType::BRACKET_OPENING)
32:             || $this->accumulator->isTypeAtStackPeek(TokenType::BRACKET_CLOSING);
33:     }
34: }
35: