Re:Using D to Create the World’s Fastest File System
by int_19h on Wednesday December 05, 2018 @06:53AM
(#18607459)
Metaprogramming generally involves complicated code like that. The choice is really simple: either the language allows it, and then some features can be implemented as a library (and we see the immediate benefit of that in this case, where the library can be rewritten to optimize it for some specific use-case), or else the language doesn't, and then those features have to be implemented as language constructs, or are omitted entirely.
Re:Using D to Create the World’s Fastest File System
by ileri62 on Wednesday December 05, 2018 @06:27AM
(#18607345)
that's just nitpicking. I bet you can find equally ugly examples in the other 2 languages. My point is that "standard" code is infinitely more readable than either c++ or rust.
Re:Using D to Create the World’s Fastest File System
by vthriller on Wednesday December 05, 2018 @07:52AM
(#18607759)
> My point is that "standard" code is infinitely more readable than either c++ or rust.
Still I'm struggling to see any code that is significantly more readable because of D's design decisions, or details on what makes D more readable than $lang (especially compared to modern C++/Rust that you seem to despise so much).
Re:Using D to Create the World’s Fastest File System
by WalterBright on Wednesday December 05, 2018 @03:44PM
(#18612333)
1. Template syntax. For example, a struct template in D is:
struct S(T) { ... }
T func(T)(T t) { ... }
3. Terser declarations:
ulong x;
unsigned long long x;
5. Nested functions mean they can be nestled close to where they are used rather than much further away in the file.
6. None of that awful
#ifndef __INCLUDED_FOO_H
#define __INCLUDED_FOO_H
...
#endif
Re:Using D to Create the World’s Fastest File System
by vthriller on Thursday December 06, 2018 @05:29AM
(#18616829)
I already find function template syntax (1) a bit more confusing because of consecutive parentheses (I can get used to it pretty easily, but it will always be a bit slower to read), and 2–6 does not make me want to convert to D from Rust.
Re:Using D to Create the World’s Fastest File System
by skocznymroczny on Wednesday December 05, 2018 @09:21AM
(#18608369)
It has some additional. Because so much code is generated on the fly during compilation, and because of frequent use of auto, IDEs have a hard time understanding the syntax to provide proper autocompletion :(
I did a quick dive into aforementioned stdlib only to stumble upon something I would rather prefer any Rust/C++ version over: https://github.com/weka-io/mecca/blob/f5dc6d9f71983ea7b852ad...
Some might want to exempt standard library from the "readable code" argument, but I'd argue that readability argument was lost the moment language designers allowed anyone to write things like `whatisthis!"whatever"({t.__ctor(args);})` (regardless of best practices that regular devs might unanimously follow). You can't just say that "A is bad 'cause it allows unreadable code" and follow that with "nobody's doing bad things in B therefore it's much better".