// hasDots reports whether the last argument in the call is followed by ...
func hasDots(call *ast.CallExpr) bool { return call.Ellipsis.IsValid() }

// dddErrPos returns the positioner for reporting an invalid ... use in a call.
func dddErrPos(call *ast.CallExpr) positioner { return atPos(call.Ellipsis) }

// argErrPos returns positioner for reporting an invalid argument count.

		Obj     *Object   // denoted object, or nil. Deprecated: see Object.
	}

	// An Ellipsis node stands for the "..." type in a
	// parameter list or the "..." length in an array type.
	//
	Ellipsis struct {
		Ellipsis token.Pos // position of "..."
		Elt      Expr      // ellipsis element type (parameter lists only); or nil
	}

	// A BasicLit node represents a literal of basic type.

	}

	// If didn't parse enough, expand ellipsis.
	if i < 16 {
		if ellipsis < 0 {
			return Addr{}, parseAddrError{in: in, msg: "address string too short"}
		}
		n := 16 - i
		for j := i - 1; j >= ellipsis; j-- {
			ip[j+n] = ip[j]
		}
		clear(ip[ellipsis : ellipsis+n])
	} else if ellipsis >= 0 {
		// Ellipsis must represent at least one 0 group.

    ```

!!! info "Дополнительная информация"
    Если вы ранее не сталкивались с `...`: это специальное значение, <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">часть языка Python и называется "Ellipsis"</a>.

    Используется в Pydantic и FastAPI для определения, что значение требуется обязательно.

Таким образом, **FastAPI** определяет, что параметр является обязательным.

      padded_begin.push_back(0);
      padded_end.push_back(0);
      padded_stride.push_back(1);
    }

    // Account for ellipsis mask.
    ++index;

    // After the ellipsis.
    for (; index < begin_shape[0];) {
      padded_begin.push_back(begin_dense_elem_attr.getValues<int32_t>()[index]);
      padded_end.push_back(end_dense_elem_attr.getValues<int32_t>()[index]);
      padded_stride.push_back(

    ```

!!! info
    If you hadn't seen that `...` before: it is a special single value, it is <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">part of Python and is called "Ellipsis"</a>.

    It is used by Pydantic and FastAPI to explicitly declare that a value is required.

This will let **FastAPI** know that this parameter is required.

{!../../../docs_src/query_params_str_validations/tutorial006.py!}
```

!!! info "정보"
    이전에 `...`를 본적이 없다면: 특별한 단일값으로, <a href="https://docs.python.org/3/library/constants.html#Ellipsis" class="external-link" target="_blank">파이썬의 일부이며 "Ellipsis"라 부릅니다</a>.

이렇게 하면 **FastAPI**가 이 매개변수는 필수임을 알 수 있습니다.

## 쿼리 매개변수 리스트 / 다중값

쿼리 매개변수를 `Query`와 함께 명시적으로 선언할 때, 값들의 리스트나 다른 방법으로 여러 값을 받도록 선언 할 수도 있습니다.

	// generated by a Go parser.)

	switch x := x.(type) {
	default:
		fmt.Fprintf(buf, "(ast: %T)", x) // nil, ast.BadExpr, ast.KeyValueExpr

	case *ast.Ident:
		buf.WriteString(x.Name)

	case *ast.Ellipsis:
		buf.WriteString("...")
		if x.Elt != nil {
			WriteExpr(buf, x.Elt)
		}

	case *ast.BasicLit:
		buf.WriteString(x.Value)

	case *ast.FuncLit:
		buf.WriteByte('(')
		WriteExpr(buf, x.Type)

	//     37  .  .  .  .  .  .  .  .  .  Kind: STRING
	//     38  .  .  .  .  .  .  .  .  .  Value: "\"Hello, World!\""
	//     39  .  .  .  .  .  .  .  .  }
	//     40  .  .  .  .  .  .  .  }
	//     41  .  .  .  .  .  .  .  Ellipsis: -
	//     42  .  .  .  .  .  .  .  Rparen: 4:25
	//     43  .  .  .  .  .  .  }
	//     44  .  .  .  .  .  }
	//     45  .  .  .  .  }
	//     46  .  .  .  .  Rbrace: 5:1
	//     47  .  .  .  }

  *rhs_named_label_count = rhs_count;
  return labels;
}

// Generate new unnamed labels for the expression.
// For example, if we have GenerateLabels(2, {'b', 'c', 'd'}) for "...xy"
// We will have "dcxy" for the ellipsis expression since it's rank 4,
// we will have dcbxy if it's rank 5.
std::string GenerateLabels(int count,
                           const llvm::SetVector<char>& available_labels) {
  std::string new_labels(count, 0);