%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
declare (strict_types=1);
namespace PHPStan\PhpDocParser\Parser;
use PHPStan\PhpDocParser\Lexer\Lexer;
use function array_pop;
use function assert;
use function count;
use function in_array;
use function strlen;
class TokenIterator
{
/** @var mixed[][] */
private $tokens;
/** @var int */
private $index;
/** @var int[] */
private $savePoints = [];
public function __construct(array $tokens, int $index = 0)
{
$this->tokens = $tokens;
$this->index = $index;
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] !== Lexer::TOKEN_HORIZONTAL_WS) {
return;
}
$this->index++;
}
public function currentTokenValue() : string
{
return $this->tokens[$this->index][Lexer::VALUE_OFFSET];
}
public function currentTokenType() : int
{
return $this->tokens[$this->index][Lexer::TYPE_OFFSET];
}
public function currentTokenOffset() : int
{
$offset = 0;
for ($i = 0; $i < $this->index; $i++) {
$offset += strlen($this->tokens[$i][Lexer::VALUE_OFFSET]);
}
return $offset;
}
public function isCurrentTokenValue(string $tokenValue) : bool
{
return $this->tokens[$this->index][Lexer::VALUE_OFFSET] === $tokenValue;
}
public function isCurrentTokenType(int ...$tokenType) : bool
{
return in_array($this->tokens[$this->index][Lexer::TYPE_OFFSET], $tokenType, \true);
}
public function isPrecededByHorizontalWhitespace() : bool
{
return ($this->tokens[$this->index - 1][Lexer::TYPE_OFFSET] ?? -1) === Lexer::TOKEN_HORIZONTAL_WS;
}
/**
* @throws ParserException
*/
public function consumeTokenType(int $tokenType) : void
{
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] !== $tokenType) {
$this->throwError($tokenType);
}
$this->index++;
if (($this->tokens[$this->index][Lexer::TYPE_OFFSET] ?? -1) !== Lexer::TOKEN_HORIZONTAL_WS) {
return;
}
$this->index++;
}
/**
* @throws ParserException
*/
public function consumeTokenValue(int $tokenType, string $tokenValue) : void
{
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] !== $tokenType || $this->tokens[$this->index][Lexer::VALUE_OFFSET] !== $tokenValue) {
$this->throwError($tokenType, $tokenValue);
}
$this->index++;
if (($this->tokens[$this->index][Lexer::TYPE_OFFSET] ?? -1) !== Lexer::TOKEN_HORIZONTAL_WS) {
return;
}
$this->index++;
}
/** @phpstan-impure */
public function tryConsumeTokenValue(string $tokenValue) : bool
{
if ($this->tokens[$this->index][Lexer::VALUE_OFFSET] !== $tokenValue) {
return \false;
}
$this->index++;
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] === Lexer::TOKEN_HORIZONTAL_WS) {
$this->index++;
}
return \true;
}
/** @phpstan-impure */
public function tryConsumeTokenType(int $tokenType) : bool
{
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] !== $tokenType) {
return \false;
}
$this->index++;
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] === Lexer::TOKEN_HORIZONTAL_WS) {
$this->index++;
}
return \true;
}
public function getSkippedHorizontalWhiteSpaceIfAny() : string
{
if ($this->index > 0 && $this->tokens[$this->index - 1][Lexer::TYPE_OFFSET] === Lexer::TOKEN_HORIZONTAL_WS) {
return $this->tokens[$this->index - 1][Lexer::VALUE_OFFSET];
}
return '';
}
/** @phpstan-impure */
public function joinUntil(int ...$tokenType) : string
{
$s = '';
while (!in_array($this->tokens[$this->index][Lexer::TYPE_OFFSET], $tokenType, \true)) {
$s .= $this->tokens[$this->index++][Lexer::VALUE_OFFSET];
}
return $s;
}
public function next() : void
{
$this->index++;
if ($this->tokens[$this->index][Lexer::TYPE_OFFSET] !== Lexer::TOKEN_HORIZONTAL_WS) {
return;
}
$this->index++;
}
/** @phpstan-impure */
public function forwardToTheEnd() : void
{
$lastToken = count($this->tokens) - 1;
$this->index = $lastToken;
}
public function pushSavePoint() : void
{
$this->savePoints[] = $this->index;
}
public function dropSavePoint() : void
{
array_pop($this->savePoints);
}
public function rollback() : void
{
$index = array_pop($this->savePoints);
assert($index !== null);
$this->index = $index;
}
/**
* @throws ParserException
*/
private function throwError(int $expectedTokenType, ?string $expectedTokenValue = null) : void
{
throw new \PHPStan\PhpDocParser\Parser\ParserException($this->currentTokenValue(), $this->currentTokenType(), $this->currentTokenOffset(), $expectedTokenType, $expectedTokenValue);
}
}
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