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TokenIterator: add save points

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This commit is contained in:
Jan Tvrdik 2017-11-18 16:14:05 +01:00
parent 9983296e35
commit 3dda8122e1
1 changed files with 21 additions and 0 deletions
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21
src/Parser/TokenIterator.php
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@ -13,6 +13,9 @@ class TokenIterator
/** @var int */ /** @var int */
private $index; private $index;
/** @var int[] */
private $savePoints = [];
public function __construct(array $tokens, int $index = 0) public function __construct(array $tokens, int $index = 0)
{ {
@ -147,6 +150,24 @@ class TokenIterator
} }
public function pushSavePoint(): void
{
$this->savePoints[] = $this->index;
}
public function dropSavePoint(): void
{
array_pop($this->savePoints);
}
public function rollback(): void
{
$this->index = array_pop($this->savePoints);
}
/** /**
* @throws ParserException * @throws ParserException
*/ */