Re: [boost] [Boost.FixedPoint] Choose notation

Subject: Re: [boost] [Boost.FixedPoint] Choose notation
From: John Maddock (john_at_[hidden])
Date: 2013-04-29 04:03:51

> If you absolutely needed an 8.4 type then you need fixed-width integer 
> support beyond that provided by <cstdint>. You could provide an 
> implementation of integer<12> that is a 12 bit integer and then make 
> fixed<integer<12>,4>. In my opinion this is another library outside the 
> scope of a fixed-point library.

Can I just point out that the multiprecision lib will do a 12-bit int type 
if that's what you want:

typedef number<cpp_int<12, 12, unsigned_magnitude, unchecked, void> > 
my_int12_t;

Of course the signed version is signed-magnitude not 2's complement....

BTW, it may well also be worth investigating using multiprecision::number as 
the front end for these types?

Now I'll go back to lurking ;-)  John.