• SteveGuo (4/4) Aug 05 2013 Does D support types like cpp_int or cpp_rational in
• SteveGuo (2/2) Aug 05 2013 Is there a plan to support those kind of types? If support, is it
• bearophile (10/12) Aug 06 2013 That will not have a core language support, beside perhaps
• SteveGuo (2/11) Aug 06 2013 Thanks for replying:) I have to choose c++ on my project. Though
• bearophile (4/5) Aug 06 2013 Are std.bigint not efficient enough?
• SteveGuo (2/5) Aug 06 2013 std.bigint, I think it's an equevelent of cpp_int, but My project
• bearophile (6/8) Aug 06 2013 A rational was implemented in D by several persons, it's easy. Of
• SteveGuo (1/6) Aug 06 2013 That's great!
• H. S. Teoh (6/10) Aug 05 2013 There's std.bigint, but I don't know whether there's a rational library

"SteveGuo" <steveguo outlook.com> writes:

Does D support types like cpp_int or cpp_rational in
boost::multiprecision? D is designed directly mapped to hardware
for speed reason. But in some cases, we do need types like
cpp_int or cpp_rational support.

"SteveGuo" <steveguo outlook.com> writes:

Is there a plan to support those kind of types? If support, is it
a core language feature or library support?

"bearophile" <bearophileHUGS lycos.com> writes:

SteveGuo:

 Is there a plan to support those kind of types? If support,
 is it a core language feature or library support?

That will not have a core language support, beside perhaps 
cent/ucent. At the moment there are no plans for library support, 
but eventually in some years fixed-size multi-precision integers 
will be good to have in Phobos, just like several other things, 
like nD packed arrays 
(http://pempek.net/articles/2013/08/03/packedarray-random-access-array-tightly-packe
-unsigned-integers/ 
) etc.

Bye,
bearophile

"SteveGuo" <steveguo outlook.com> writes:

 That will not have a core language support, beside perhaps 
 cent/ucent. At the moment there are no plans for library 
 support, but eventually in some years fixed-size 
 multi-precision integers will be good to have in Phobos, just 
 like several other things, like nD packed arrays 
 (http://pempek.net/articles/2013/08/03/packedarray-random-access-array-tightly-packe
-unsigned-integers/ 
 ) etc.

 Bye,
 bearophile

Thanks for replying:) I have to choose c++ on my project. Though 
I love D.

"bearophile" <bearophileHUGS lycos.com> writes:

SteveGuo:

 I have to choose c++ on my project.

Are std.bigint not efficient enough?

Bye,
bearophile

"SteveGuo" <steveguo outlook.com> writes:

 Are std.bigint not efficient enough?

 Bye,
 bearophile

std.bigint, I think it's an equevelent of cpp_int, but My project 
has to use cpp_rational

"bearophile" <bearophileHUGS lycos.com> writes:

SteveGuo:

 std.bigint, I think it's an equevelent of cpp_int, but My 
 project has to use cpp_rational

A rational was implemented in D by several persons, it's easy. Of 
the few problems is implement an efficient GCD among bigints 
(that sooner or later will be needed in std.bigint).

Bye,
bearophile

"SteveGuo" <steveguo outlook.com> writes:

 A rational was implemented in D by several persons, it's easy. 
 Of the few problems is implement an efficient GCD among bigints 
 (that sooner or later will be needed in std.bigint).

 Bye,
 bearophile

That's great!

"H. S. Teoh" <hsteoh quickfur.ath.cx> writes:

On Tue, Aug 06, 2013 at 07:43:29AM +0200, SteveGuo wrote:
 Does D support types like cpp_int or cpp_rational in
 boost::multiprecision? D is designed directly mapped to hardware
 for speed reason. But in some cases, we do need types like
 cpp_int or cpp_rational support.

There's std.bigint, but I don't know whether there's a rational library
yet. But you can probably use BigInt to implement one.


T

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