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digitalmars.D - Data-Oriented Demo: SOA, composition via crazy 'using'

reply "Fool" <fool dlang.org> writes:
Jonathan Blow published another video [1] presenting the progress 
of his language. He is treating two main topics:

  - a keyword preliminary called 'using' which seems to be quite 
close to 'alias this';
  - an annotation SOA for pointers and arrays which allow high 
level treatment of structures of arrays;

Jonathan does not seem to be aware of 'alias this' in D.

--

[1] https://www.youtube.com/watch?v=ZHqFrNyLlpA

[2] 
https://www.reddit.com/r/programming/comments/2t5ikw/jai_demo_dataoriented_features_soa_crazy_using/
Jan 21 2015
next sibling parent Max Klyga <max.klyga gmail.com> writes:
On 2015-01-21 19:12:20 +0000, Fool said:


 Jonathan Blow published another video [1] presenting the progress of 
 his language. He is treating two main topics:
 
   - a keyword preliminary called 'using' which seems to be quite close 
 to 'alias this';
   - an annotation SOA for pointers and arrays which allow high level 
 treatment of structures of arrays;
 
 Jonathan does not seem to be aware of 'alias this' in D.


This is a very good video demonstrating the power that 'alias this' 
gives to people that really want to controll object layout and manage 
details of memory access patterns.

AoS and SoA annotations are interesting. This should be easily 
replicatable with the power of D's templates except for the 
'robustness' part of his talk, as you would have to change declarations 
at invocation part to switch AoS to SoA and back.

The material in his talk would make a great blog post demostrating 
power of 'alias this'
Jan 21 2015
prev sibling next sibling parent "thedeemon" <dlang thedeemon.com> writes:
On Wednesday, 21 January 2015 at 19:12:21 UTC, Fool wrote:

  - a keyword preliminary called 'using' which seems to be quite 
 close to 'alias this';


By the way, what's the current status with multiple `alias this`?
Jan 21 2015
prev sibling next sibling parent "bearophile" <bearophileHUGS lycos.com> writes:
Fool:


 Jonathan Blow published another video [1] presenting the
 progress of his language. He is treating two main topics:

  - a keyword preliminary called 'using' which seems to be quite
 close to 'alias this';
  - an annotation SOA for pointers and arrays which allow high
 level treatment of structures of arrays;

 Jonathan does not seem to be aware of 'alias this' in D.


In D there is also the under-used with() statement. You can 
sometimes replace his "using" with "with" in D.

Regarding his SOA and AOS annotations for pointers, arrays and 
_structures_, they are nice. Adding a SOA array in 
std.collections seems a good idea (but it can't cover all usages 
of his SOA and AOS keywords). (But I'd like some performance 
benchmarks that show the advantages of those things in practice).

See also:
http://www.reddit.com/r/rust/comments/2t6xqz/jai_demo_dataoriented_features_soa_crazy_using/

Bye,
bearophile
Jan 22 2015
prev sibling parent reply Justin Whear <justin economicmodeling.com> writes:
On Wed, 21 Jan 2015 19:12:20 +0000, Fool wrote:


 Jonathan Blow published another video [1] presenting the progress of his
 language. He is treating two main topics:
 
   - a keyword preliminary called 'using' which seems to be quite
 close to 'alias this';
   - an annotation SOA for pointers and arrays which allow high
 level treatment of structures of arrays;
 
 Jonathan does not seem to be aware of 'alias this' in D.


I just whacked this out in D: http://dpaste.dzfl.pl/90d96cf05792

The string mixin for the members is only necessary because there's no 
other way to initialize the arrays (can't use parameterless constructor, 
no init() function, etc.)
Jan 22 2015
parent reply Justin Whear <justin economicmodeling.com> writes:
On Thu, 22 Jan 2015 17:40:17 +0000, Justin Whear wrote:


 I just whacked this out in D: http://dpaste.dzfl.pl/90d96cf05792


Remembered the allMembers trait, using a pointer to parent, etc: http://
dpaste.dzfl.pl/6fd66ae9b767
Jan 22 2015
parent reply Justin Whear <justin economicmodeling.com> writes:
On Thu, 22 Jan 2015 18:03:31 +0000, Justin Whear wrote:


 On Thu, 22 Jan 2015 17:40:17 +0000, Justin Whear wrote:
 

 I just whacked this out in D: http://dpaste.dzfl.pl/90d96cf05792


 
 Remembered the allMembers trait, using a pointer to parent, etc: http://
 dpaste.dzfl.pl/6fd66ae9b767


OK, I'm done now. 
100% better: http://dpaste.dzfl.pl/4ac987a0fc5a
Jan 22 2015
parent reply "Kiith-Sa" <kiithsacmp gmail.com> writes:
On Thursday, 22 January 2015 at 19:28:13 UTC, Justin Whear wrote:

 On Thu, 22 Jan 2015 18:03:31 +0000, Justin Whear wrote:


 On Thu, 22 Jan 2015 17:40:17 +0000, Justin Whear wrote:
 

 I just whacked this out in D: 
 http://dpaste.dzfl.pl/90d96cf05792


 
 Remembered the allMembers trait, using a pointer to parent, 
 etc: http://
 dpaste.dzfl.pl/6fd66ae9b767


 OK, I'm done now.
 100% better: http://dpaste.dzfl.pl/4ac987a0fc5a


Could you put this up on GitHub/dub? Even if simple this could be 
very useful.
Jan 22 2015
parent Justin Whear <justin economicmodeling.com> writes:
On Thu, 22 Jan 2015 21:04:04 +0000, Kiith-Sa wrote:


 Could you put this up on GitHub/dub? Even if simple this could be very
 useful.


Added some features and a dynamic array implementation, put it up here:
https://github.com/economicmodeling/soa
Jan 22 2015