[phobos] std.base64 replacement

[Masahiro Nakagawa]

On Thu, 14 Oct 2010 09:45:38 +0900, Andrei Alexandrescu  
<andrei at erdani.com> wrote:

>
> About the ongoing discussion about Base64: I do see a few problems with  
> the current interface, although not a major one.
>
> 1. The template parameters '!' and '/' are not justified. They should be  
> runtime parameters. Rule of thumb: use generic code when you stand to  
> profit.

I don't understand this point.
Please tell me the merit of runtime parameters.
I can't imagine such situations.

> 2. This function:
>
> size_t encode(Range)(in ubyte[] source, Range range);
>
> has one issue: (a) it forces input to an array although it could work  
> with any input range with length of ubyte. Suggestion:
>
> size_t encode(R1, R2)(R1 source, R2 target);
>
> Constrain the template any way you need that keeps implementation  
> efficient. Ideally you should have roughly the same performance with a  
> ubyte[] as before.
>
> 3. Same discussion about decode. This is actually more important because  
> you might want to decode streams of dchar. This is how many streams will  
> come through, even though they are technically Ascii.

http://lists.puremagic.com/pipermail/phobos/2010-October/002920.html

I already mentioned such encode / decode but no response.
So I suspend the implementation of these functions.
OK, I will implement.