Re: generic + numeric + literals = abomination

[so]

Why a generic code have to be ugly?
At this age of compilers and languages, and the capabilities of DMD?
Why that many casts? or implicit casts?
DMD already doing it behind the scenes with constant folding,
not sure but i think literals stay that way mostly because of C  
compatibility!

Thanks.

On Sun, 28 Mar 2010 19:09:18 +0400, #ponce <nos...@nospam.com> wrote:

so Wrote:

Basically what i am asking is hmmm, ability to write generic constants?  
:)

Thanks!

Hi,

When writing generic FP code i always use real literals and cast to T,  
or int. I suggest doing this.
Like:

T exp3(T)(T x)
{
        if (x < cast(T)(-1.15365L))
        {
                return 0;
        }
        else
        {
		return cast(T)1.L + x * (cast(T)1.0L + x * (cast(T)0.5L + x *  
cast(T)0.3333333333333L));
        }
}


I assume the compiler will be able to optimize the cast in release mode.

If you really wan't to prevent this cast in debug mode, you can simply  
go with:

const T myConst = 0.3L;

then the cast will be compile-time.



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