[Oberon] Type guard: unnecessary?

[Srinivas Nayak]

Any help please?


With thanks and best regards,

Yours sincerely,
Srinivas Nayak

Home: http://www.mathmeth.com/sn/
Blog: http://srinivas-nayak.blogspot.in/

On 09/29/2016 06:58 PM, Srinivas Nayak wrote:
> Dear All,
>
> In the Programming in Oberon (Tutorial) rev. 5.10.2015, in section 23.2 last paragraph we read:
> "The simple designator p.radius would not be acceptable, because p is of type Figure."
> In section 23.4 last but one paragraph we read:
> "The further facility of the type guard is merely one of convenience."
>
> Is type guard not necessary?
>
>
> With thanks and best regards,
>
> Yours sincerely,
> Srinivas Nayak
>
> Home: http://www.mathmeth.com/sn/
> Blog: http://srinivas-nayak.blogspot.in/