public function testOperatorsAreReturnedBySymbol()
{
$this->assertTrue($this->collection->exists($this->mockOperator));
$this->assertTrue($this->collection->exists($this->otherOperator));
$this->assertFalse($this->collection->exists($this->getMockBuilder('\\Minty\\Compiler\\Operator')->disableOriginalConstructor()->getMockForAbstractClass()));
$this->assertSame($this->mockOperator, $this->collection->getOperator('+'));
$this->assertSame($this->mockOperator, $this->collection->getOperator('-'));
$this->assertSame($this->otherOperator, $this->collection->getOperator('*'));
}
/**
* @param bool $return
*
* @return Node|null
*/
private function parseExpression($return = false)
{
//push sentinel
$this->operatorStack->push(null);
$token = $this->parseToken();
while ($token->test(Token::OPERATOR, [$this->binaryOperators, 'isOperator'])) {
$this->pushOperator($this->binaryOperators->getOperator($token->getValue()));
$token = $this->parseToken();
}
while ($this->operatorStack->top() !== null) {
$this->popOperator();
}
//pop sentinel
$this->operatorStack->pop();
//A conditional is marked by '?' (punctuation, not operator) so it breaks the loop above.
if ($token->test(Token::PUNCTUATION, '?')) {
$this->parseConditional();
}
if ($return) {
return $this->operandStack->pop();
}
return null;
}