Le 01/04/12 17:55, John Maddock a écrit :
Folks,
I'd like to ask for a formal review of the Multiprecision Arithmetic Library, currently in the sandbox.
Features:
* Expression template enabled front end. * Support for Integer, Rational and Floating Point types.
Hi John, very good work.
Supported Integer backends:
* GMP. * Libtommath. * cpp_int.
cpp_int is an all C++ Boost licensed backend, supports both arbitrary precision types (with Allocator support), and signed and unsigned fixed precision types (with no memory allocation).
I'm wondering if the following compiles and what is the type of c mp_uint128_t a; mp_uint256_t b; auto c = a + b; From the documentation I have the impression that we can not mix back-ends. It seems to me that fixed precision and allocation are orthogonal features. Why the fixed precision types can not use an allocator?
There's nothing in principal to prevent extension to complex numbers and interval arithmetic types (plus any other number types I've forgotten!), but I've run out of energy for now ;-)
I'm working on a fixed_point library (see the sandbox code, sorry, but there is no doc yet but http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3352.html is quite close ). I would like to see if your front-end could also improve the performances in this case. I will try to adapt it to the back-end constraints soon.
And of course, I'm looking for a review manager ;-)
Good luck, Vicente