Flitch\Rule\File\Encoding::visitFile PHP Method

    public function visitFile(File $file)
    {
        $source = $file->getSource();
        if (@iconv($this->encoding, $this->encoding, $source) !== $source) {
            $this->addViolation($file, 0, 0, sprintf('File is not encoded in "%s"', $this->encoding));
            return;
        }
        if (!$this->allowBom && isset(self::$byteOrderMarks[$this->encoding])) {
            $bom = self::$byteOrderMarks[$this->encoding];
            if (substr($source, 0, strlen($bom)) === $bom) {
                $this->addViolation($file, 0, 0, sprintf('File starts with a BOM', $this->encoding));
            }
        }
    }