POV-Ray : Newsgroups : povray.newusers : Ignorance rules! : Re: Ignorance rules! Server Time
9 Jun 2023 18:06:38 EDT (-0400)
  Re: Ignorance rules!  
From: William F Pokorny
Date: 27 May 2021 06:04:42
Message: <60af6eba$1@news.povray.org>
On 5/26/21 9:23 PM, clipka wrote:
> Am 23.06.2020 um 19:25 schrieb Cousin Ricky:
>> On 2020-06-23 7:28 AM (-4), William F Pokorny wrote:
> ...
>>> We have the convention today users should not declare IDs with lower 
>>> case characters because such things might become, or might already 
>>> be, SDL keywords. What I'm thinking about for povr is adding checking 
>>> such that users cannot declare/local a name with only (lower case 
>>> ascii, _) characters. #declare _a =... would be a parsing error.
>>> With this in place, I think it would then be the case we could always 
>>> use something like _<lowercase_parm> for all our parameters without 
>>> worry of collisions. The _ leading character would never be part of a 
>>> keyword.
>>> Am I missing something with this planned approach?
> Been there. Done that.
> Curesed a lot.
>> I suppose it could work.  It could potentially break old scenes, but I 
>> don't suppose many such scenes exist.  None of the stock include files 
>> have any such names that I can find.
> Look harder.
> `functions.inc` is what made me put the idea on the back burner.

Yes, there's that and more for complications. I've had some success with 
it and it's how I've been running day to day for near a year now(1). 
Twiddle with the hacked in code now and again as I pick up some detail - 
recently performance impacts doing millions of calls to macros. Made it 
better, but, thinking now even when compiled in there should perhaps be 
a run time switch - but given how our macros work even simple that would 
be seen performance wise in the worst cases.

Today, I'd say it'll stay in as a configure option for sure, but we'll see.

Bill P.

(1) - It lines up with my coding style/aim where it won't with all.

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