ilAssLacAbstractExpression.php

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<?php

abstract class ilAssLacAbstractExpression extends ilAssLacAbstractComposite implements ilAssLacExpressionInterface
{
    protected function getPattern(): string
    {
        return '/-?[0-9\.]+/';
    }

    public function parseValue($value): void
    {
        $result = [];
        preg_match_all($this->getPattern(), $value, $result);
        $this->setMatches($result);
    }

    abstract protected function setMatches($matches);
}