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<?php
declare(strict_types=1);
namespace byrokrat\autogiro\Parser\Matcher;
use byrokrat\autogiro\Line;
use byrokrat\autogiro\Exception\InvalidContentException;
/**
* Base implementation of the Matcher interface
*/
abstract class BaseMatcher implements Matcher
{
* @var int Start matching from
private $startPos;
* @var int Length to match
private $length;
* Set match area
*
* Note that to make matcher definitions and the technical specifications of
* autoirot appear as similar as possible the first character of a line is
* regarded as being in position one (1).
public function __construct(int $startPos, int $length)
$this->startPos = $startPos;
$this->length = $length;
}
* Get a description of the expected content
abstract protected function getDescription(): string;
* Check if string is valid according to matching rules
abstract protected function isMatch(string $str): bool;
* Match line and grab substring on success
* @throws InvalidContentException if line does not match
public function match(Line $line): string
$str = $line->substr($this->startPos - 1, $this->length);
if (!$this->isMatch($str)) {
throw new InvalidContentException(
sprintf(
"Invalid content '%s' (expecting %s) starting at position %s",
$str,
$this->getDescription(),
$this->startPos - 1
)
);
return $str;
byrokrat /
autogiro
