I really like the idea, and the API looks good. Have you considered an MPIR backend, in addition to GMP and others? Being the Windows port of GMP, the interfaces and usage are identical. On 22 December 2011 at 13:41 John Maddock <boost.regex@virgin.net> wrote:
Folks,
I'd like to get some feedback on a multiprecision arithmetic library I've been preparing for possible Boost inclusion. The code is in the sandbox under the "big_number" directory. Docs can be viewed online here: http://svn.boost.org/svn/boost/sandbox/big_number/libs/multiprecision/doc/ht...
The main features are:
* A generic front-end that's capable of wrapping almost any type that's a "number". The front end is expression template enabled and handles all the expression optimization and code reduction. For example it's possible to evaluate a polynomial using Horner's rule without a single temporary variable being created. * A series of backends that need only provide a reduced interface and set of operations, implement the actual arithmetic, currently supported backends are:
Integer Types ~~~~~~~~~ 1/ GMP (MPZ). 2/ libtommath.
Rational Types ~~~~~~~~~~ 1/ GMP (MPQ). [ But note that the integer types can also be used as template aruments to Boost.Rational ]
Floating Point Types ~~~~~~~~~~~~~~ 1/ GMP (MPF) 2/ MPFR 3/ cpp_float - an all C++ Boost-licensed backend based on Christopher Kormanyos' e_float code. [ Note these three types are fully compatible with Boost.Math Trunk - so you get full standard library plus special function support ]
There's still a bunch to do, but I'd like to see what folks think, and where the main priorities should be before submission.
Thanks in advance, John.
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