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Re: Endianness

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Elizabeth D. Rather wrote:
> On 4/23/17 2:09 PM, HAA wrote:
> > Andrew Haley wrote:
> >> HAA <someone@microsoft.com> wrote:
> >>> Rudy Velthuis wrote:
> >>>> ...
> >>>> If this is the case, is this true for bytes in a cell too, or is that
> >>>> implementation defined?
> >>>
> >>> This is where things can get messy.  Let's say you need to store a
> >>> character in a variable.  Usual practice is to use VARIABLE for this
> >>> because there's nothing conveniently smaller.  This leads to use
> >>> of @ ! in Forth code to handle characters which is an obvious type
> >>> mismatch.
> >>
> >> This doesn't really make any sense to me.  You can always access
> >> individual bytes of storage, so creating a VARIABLE and accessing it
> >> with C@ and C! is just fine.
> >
> > It is fine.  But when a programmer unfamiliar with the code notes
> > storage labelled VARIABLE, he may well conclude @ and ! was
> > appropriate and mistakenly apply it.  Endianness may bring forth
> > the error, or hide it.  Finding the bug could prove interesting.
>
> So long as you consistently use *either* c@/c! *or* @/! you're fine. You
> only get in trouble if you've done a ! and then do a c@ and wonder what
> you've got.
>
> Cheers,
> Elizabeth

Too many assumptions.  You use C@ C! on a VARIABLE.  I come along
later to do a mod and see VARIABLE.  I naturally assume @ ! is required.
Everything still works.  Nobody knows there is now a ticking time bomb
in the code.

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Endianness "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-21 20:46 +0000
  Re: Endianness Alex <alex@rivadpm.com> - 2017-04-21 22:48 +0100
    Re: Endianness "Elizabeth D. Rather" <erather@forth.com> - 2017-04-21 12:16 -1000
      Re: Endianness "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-22 04:42 +0000
        Re: Endianness "Elizabeth D. Rather" <erather@forth.com> - 2017-04-21 21:45 -1000
  Re: Endianness "HAA" <someone@microsoft.com> - 2017-04-22 11:12 +1000
    Re: Endianness "Elizabeth D. Rather" <erather@forth.com> - 2017-04-21 16:11 -1000
      Re: Endianness hughaguilar96@gmail.com - 2017-04-23 13:41 -0700
      Re: Endianness Bernd Paysan <bernd@net2o.de> - 2017-05-07 22:52 +0000
    Re: Endianness "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-22 04:45 +0000
      Re: Endianness "HAA" <someone@microsoft.com> - 2017-04-23 12:21 +1000
        Re: Endianness Julian Fondren <julian.fondren@gmail.com> - 2017-04-22 22:49 -0700
          Re: Endianness "HAA" <someone@microsoft.com> - 2017-04-23 18:57 +1000
            Re: Endianness Julian Fondren <julian.fondren@gmail.com> - 2017-04-23 02:13 -0700
          Re: Endianness "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-29 03:37 +0000
      Re: Endianness anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-24 16:56 +0000
    Re: Endianness Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-23 04:45 -0500
      Re: Endianness "HAA" <someone@microsoft.com> - 2017-04-24 10:09 +1000
        Re: Endianness "Elizabeth D. Rather" <erather@forth.com> - 2017-04-23 14:40 -1000
          Re: Endianness "HAA" <someone@microsoft.com> - 2017-04-24 13:41 +1000
            Re: Endianness "Elizabeth D. Rather" <erather@forth.com> - 2017-04-23 17:58 -1000
              Re: Endianness hughaguilar96@gmail.com - 2017-04-23 21:42 -0700
                Re: Endianness Julian Fondren <julian.fondren@gmail.com> - 2017-04-23 21:58 -0700
            Re: Endianness Julian Fondren <julian.fondren@gmail.com> - 2017-04-23 21:18 -0700
              Re: Endianness Julian Fondren <julian.fondren@gmail.com> - 2017-04-23 21:24 -0700
              Re: Endianness "HAA" <someone@microsoft.com> - 2017-04-26 09:21 +1000
                Re: Endianness Julian Fondren <julian.fondren@gmail.com> - 2017-04-25 16:56 -0700
  Re: Endianness anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-24 16:58 +0000

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