Re: [boost] [review] Multiprecision review scheduled for June 8th - 17th, 2012

Subject: Re: [boost] [review] Multiprecision review scheduled for June 8th - 17th, 2012
From: John Maddock (boost.regex_at_[hidden])
Date: 2012-06-01 14:09:51

>>* What is the type of boost::multiprecision::number_category<B>::type for 
>>all the provided backends? Could the specialization for 
>>boost::multiprecision::number_category<B>::type be added in the 
>>documentation of each backend? and why not add also B::signed_types, 
>>B::unsigned_types, B::float_types, B::exponent_type?
>
> OK.

On second thoughts, the members of B::signed_types etc are basically 
implementation details - optimizations if you will.  Rather than listing the 
types explicitly I'd prefer some more weasel wording along the lines of 
"This type will interoperate natively with any signed or unsigned built in 
integer type no wider than a long - this means for example that multiplying 
by a integer literal is more efficient than constructing an mpz_int 
temporary from the integer and then multiplying.  Likewise for the other 
arithmetic operations."

John.