Complex number functions for std.math
Bruno Medeiros
brunodomedeirosATgmail at SPAM.com
Sat Apr 8 09:54:25 PDT 2006
James Dunne wrote:
> Don Clugston wrote:
>> Norbert Nemec wrote:
>>> (Sorry for writing "complex" instead of the monstrosity "creal". My
>>> fingers just don't obey me when I command them to write about a
>>> "complex real" number. Of course, "creal" could also stand for "really
>>> complex". But then "real" should be renamed into "cnreal", standing for
>>> "not really complex"...)
>>
>> It is a bit of an oxymoron. I do like the idea of having 'complex' as
>> a standard alias in std.math. It should operate almost as a reserved
>> word, users should not be defining it to be anything other than creal.
>> But I would not like to have to type "imaginary" instead of "ireal" --
>> it's just too long. Any ideas on that one?
>>
>
> Here's what I've devised for a floating-point type system similar to D's:
>
> single - real single-precision (32-bit) IEEE 754 floating point
> isingle - imaginary single-precision (32-bit) IEEE 754 floating poi$
> csingle - complex single
>
> double - real double-precision (64-bit) IEEE 754 floating point
> idouble - imaginary double-precision (64-bit) IEEE 754 floating poi$
> cdouble - complex double
>
> extended - real extended-precision (80-bit) IEEE 754 floating point
> iextended - imaginary extended-precision (80-bit) IEEE 754 floating point
> cextended - complex extended
>
> float - alias for single
> ifloat - alias for isingle
> cfloat - alias for csingle
>
> Notably, the float has been renamed to single, and real has been renamed
> to extended. Float still lurks around as an alias for single though.
>
How about this:
floats ifloats cfloats
floatd ifloatd cfloatd
floate ifloats cfloatd
floatc ifloatc cfloats
floath ifloath cfloatd
Another alternative:
float32 ifloat32 cfloat32
float64 ...
float80
float128
float16
etc. Just exploring alternatives, not actually suggesting it, but I
prefer a nomenclature that actually mentions that the type is a floating
point number. ("single", "extended"? Single what? Extended what?)
--
Bruno Medeiros - CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D
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