= Welcome to GMP4D =

The project aims to provide D with bindings to the [http://gmplib.org GNU Multiple Precision Arithmetic Library]. Especially the classes for integer, float and rational numbers make it possible to use arbitrary precision numbers like built-in data types! It is licensed under a BSD-style license, see LibraryLicense.

== News ==

This project sleeps until DMD is able to overload the assignment of structs, because this is necessary, since GMP-internal data is reference-based and integers are value types, thus one must use structs. Copying a number to another must copy the referenced GMP-number, so the assignment-operator must be overloadable for same types. Currently, DMD uses bitwise-copy.

Until then you might find OOP bindings for GMP under [http://dsource.org/projects/bindings/browser/trunk/gmp the Bindings project]. Those also add some stuff to work under Windows.

== Features of the library ==

 * The wrapper classes are implemented very simple and straightforward. One might think that they will be much slower than the C++ version, because those C++ guys make heavy use of templates there. This is just because classes in C++ are value types and overloaded operators will create a lot of temporaries. All those template stuff is for creating less temporaries. In D, the compiler will create a temporary, but it is not copied to the result - it's only referenced, which costs some assembly instructions, but nothing critical.
 * As I/O won't be very complex, there will be support for [http://dsource.org/projects/tango Tango] and [http://www.digitalmars.com/d/phobos/phobos.html Phobos].