OpenEuphoria

Re: fundamental data types in Euphoria cf C/C++

• Posted by Irv Mullins <irvm at ellijay.com> Aug 07, 2001
• 432 views

On Tuesday 07 August 2001 22:12, Derek Parnell wrote:
<snip>

> type Address(object x)
>     if not sequence (x) then
>         return 0
>     end if
>     if length(x) != AddressLength then
>         return 0
>     end if
>     if not equal(x[aType], AddressType) then
>         return 0
>     end if
>     if not StringASCII(x[aBuilding]) then
>         return 0
>     end if
>     if not StringASCII(x[aStreet]) then
>         return 0
>     end if
>     if not StringASCII(x[aCity]) then
>         return 0
>     end if
>     if not StringASCII(x[aPostCode]) then
>         return 0
>     end if
>     if not StringASCII(x[aCountry]) then
>         return 0
>     end if
>     if not StringASCII(x[aState]) then
>         return 0
>     end if
>
>     return 1
> end type

<snipping resumes>

And, of course you should point out that this is of purely academic 
interest, since user-written (as well as built-in) type checking can 
only respond by either silently allowing a successful assignment, 
or ending the program.  Ending a program on a data input error 
went out of favor along with the card deck, so programmers must 
validate all input anyway. Once validated, there's little reason not 
to just store it all as an "object", and dispense with type checking.

Regards,
Irv