PhpBench\Expression\Parser::parseComparison PHP Метод

    private function parseComparison($field, $args)
    {
        if (!is_array($args)) {
            $args = ['$eq' => $args];
        }
        if (count($args) != 1) {
            throw new \InvalidArgumentException(sprintf('Comparisons should be composed of a single key => value pair, got: "%s"', json_encode($args)));
        }
        $operator = key($args);
        $value = current($args);
        if (!in_array($operator, $this->comparisons)) {
            throw new \InvalidArgumentException(sprintf('Unknown comparison operator, got "%s". Valid operators: "%s"', $operator, implode('", "', $this->comparisons)));
        }
        return new Constraint\Comparison($operator, $field, $value);
    }