%PDF-
%PDF-
Mini Shell
Mini Shell
<?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 Nette\Neon;
/** @internal */
final class TokenStream
{
/** @var Token[] */
private $tokens;
/** @var int */
private $pos = 0;
public function __construct(array $tokens)
{
$this->tokens = $tokens;
}
public function getPos(): int
{
return $this->pos;
}
/** @return Token[] */
public function getTokens(): array
{
return $this->tokens;
}
public function isNext(...$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[$this->pos]);
}
public function consume(...$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.");
}
}
Zerion Mini Shell 1.0