Re: [boost] [xint] Third release is ready, requesting preliminary review

Subject: Re: [boost] [xint] Third release is ready, requesting preliminary review
From: Chad Nelson (chad.thecomfychair_at_[hidden])
Date: 2010-05-03 11:48:06

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On 05/03/2010 03:39 AM, Vicente Botet Escriba wrote:

>> flag_negative isn't stored in data_t because if it were, I'd have
>> to make a deep copy of every number when I only want to make it
>> negative for a temporary calculation.
> 
> Maybe a DSEL could help in this case.

A domain-specific embedded language? I don't know anything about such
programming, but from what I've been able to find, it sounds like a heck
of a lot of work for very little benefit.

>> flag_fixedlength isn't stored in data_t because that would defeat
>> the purpose of it, which is to identify a fixed_integer to the
>> allocation functions when no data_t has been allocated for it yet.
> 
> Maybe this can be stored on fixed interger then?

How? fixed_integer doesn't handle its own allocation, it relies on
base_integer to do that.

>> flag_readonly isn't stored in data_t because I'd have to store yet 
>> another variable there to handle it, which would be inefficient
>> because I had plenty of room in this really handy flag variable
>> that I already had to have in base_integer anyway.
> 
> Maybe a DSEL could help in this case. Could you say more when and how
> this readonly flag is used?

See base_integer.cpp, function base_integer::_is_fixed.

> I'm afraid. I was also tired and should go to sleep before. I should
> just request you to explain the rationale behind that. [...]

And I should have waited until morning to answer that message. Sorry for
going off on you like that.
- -- 
Chad Nelson
Oak Circle Software, Inc.
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