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<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare (strict_types=1);
namespace RectorPrefix202304\Nette\Neon;
/** @internal */
final class TokenStream
{
/**
* @var int
*/
private $pos = 0;
/**
* @var mixed[]
*/
public $tokens;
public function __construct(array $tokens)
{
/** @var Token[] */
$this->tokens = $tokens;
}
public function getPos() : int
{
return $this->pos;
}
/** @return Token[] */
public function getTokens() : array
{
return $this->tokens;
}
/**
* @param int|string ...$types
*/
public function isNext(...$types) : bool
{
while (\in_array($this->tokens[$this->pos]->type ?? null, [Token::Comment, Token::Whitespace], \true)) {
$this->pos++;
}
return $types ? \in_array($this->tokens[$this->pos]->type ?? null, $types, \true) : isset($this->tokens[$this->pos]);
}
/**
* @param int|string ...$types
*/
public function consume(...$types) : ?Token
{
return $this->isNext(...$types) ? $this->tokens[$this->pos++] : null;
}
public function getIndentation() : string
{
return \in_array($this->tokens[$this->pos - 2]->type ?? null, [Token::Newline, null], \true) && ($this->tokens[$this->pos - 1]->type ?? null) === Token::Whitespace ? $this->tokens[$this->pos - 1]->value : '';
}
/** @return never */
public function error(?string $message = null, ?int $pos = null) : void
{
$pos = $pos ?? $this->pos;
$input = '';
foreach ($this->tokens as $i => $token) {
if ($i >= $pos) {
break;
}
$input .= $token->value;
}
$line = \substr_count($input, "\n") + 1;
$col = \strlen($input) - \strrpos("\n" . $input, "\n") + 1;
$token = $this->tokens[$pos] ?? null;
$message = $message ?? 'Unexpected ' . ($token === null ? 'end' : "'" . \str_replace("\n", '<new line>', \substr($this->tokens[$pos]->value, 0, 40)) . "'");
throw new Exception("{$message} on line {$line}, column {$col}.");
}
}