/**
  * Is the next thing an argument?
  *
  * @return false|SysCmdArgument
  */
 protected function argument()
 {
     $name = "";
     $value = "";
     if ($this->eq("-")) {
         if (!(list($name) = $this->is("text"))) {
             throw new TextParserException("Invalid flag", $this);
         }
         list($value) = $this->is("text");
     } elseif (!(list($value) = $this->is("text"))) {
         return false;
     }
     $arg = new SysCmdArgument();
     $arg->setName($name);
     $arg->setValue($value);
     return $arg;
 }
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 /**
  * Appends a raw string.
  *
  * @param string $value Raw string
  *
  * @return SysCmdArgument
  */
 public function appendString($value)
 {
     $arg = new SysCmdArgument();
     $arg->setRaw(true);
     $arg->setValue($value);
     array_push($this->args, $arg);
     return $arg;
 }