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| thomasl_erlang at yahoo.c |
 Posted: Wed Sep 08, 2004 2:08 pm |
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Guest
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You currently can't define macros with the same name
as keywords:
-define(begin, 4711).
-define(end, 11147).
% compiler complains "badly formed define"
However, this restriction is, as far as I can see,
unnecessary: the namespaces are entirely distinct.
That is, when you subsequently use the macro, it will
be written '?begin', which will never be confused with
plain 'begin'.
Hence, I report this as a bug.
Best,
Thomas
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| danie at erlfinsys.net |
| Posted: Wed Sep 08, 2004 2:23 pm |
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Guest
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I understand the reasoning, but from a practical perspective, isn't it
better to stay away from names like that - just to avoid confusion?
(Especially with newbies)
-------
begin
case ?begin of
vs
case ?BEGIN_PORT of
-------
A bit far fetched though :)
On Wed, 2004-09-08 at 16:08, Thomas Lindgren wrote:
> You currently can't define macros with the same name
> as keywords:
>
> -define(begin, 4711).
> -define(end, 11147).
>
> % compiler complains "badly formed define"
>
> However, this restriction is, as far as I can see,
> unnecessary: the namespaces are entirely distinct.
> That is, when you subsequently use the macro, it will
> be written '?begin', which will never be confused with
> plain 'begin'.
>
> Hence, I report this as a bug.
>
> Best,
> Thomas
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Mail Address AutoComplete - You start. We finish.
> http://promotions.yahoo.com/new_mail
>
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| thomasl_erlang at yahoo.c |
| Posted: Wed Sep 08, 2004 4:18 pm |
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Guest
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--- Danie Schutte <danie_at_erlfinsys.net> wrote:
> I understand the reasoning, but from a practical
> perspective, isn't it
> better to stay away from names like that - just to
> avoid confusion?
> (Especially with newbies)
Actually, I thought it a bit confusing that one
_couldn't_ define begin, end, etc :-)
Personally, I would consider "[staying] away from
names like that" a matter for organizational coding
standards, rather than language standards. For
instance, you can already use 'begin', 'end' and so on
as atoms. And Erlang macros can already be confusing
for all the usual reasons (just like C macros).
Best,
Thomas
PS. Nice domain name :-)
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