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digitalmars.D.announce - Tango Conference 2008 - Tomasz Stachowiak and Piotr Modzelewski gamedev

reply Peter Modzelewski <peter.modzelewski gmail.com> writes:
Talk from Tango Conference 2008 performed by me and Tomasz Stachowiak:
http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008-team0xf-talk.html
You can download the slides from:
http://team0xf.com/conference/gamedev.pdf

Other videos:
DReactor:
http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008-dreactor-talk.html

DWT:
http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008-dwt-talk-video.html

MiniD:
http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-minid-talk-video.html

Fibers:
http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-fibers-talk-video.html

Compiler workshop:
http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-compiler-and.html
Nov 06 2008
next sibling parent Clay Smith <clayasaurus gmail.com> writes:
Peter Modzelewski wrote:

 Talk from Tango Conference 2008 performed by me and Tomasz Stachowiak:
 http://petermodzelewski.blogspot.com/2008/11/tango-conference-20
8-team0xf-talk.html 
 
 You can download the slides from:
 http://team0xf.com/conference/gamedev.pdf
 
 Other videos:
 DReactor:
 http://petermodzelewski.blogspot.com/2008/11/tango-conference-200
-dreactor-talk.html 
 
 
 DWT:
 http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008
dwt-talk-video.html 
 
 
 MiniD:
 http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-m
nid-talk-video.html 
 
 
 Fibers:
 http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-fi
ers-talk-video.html 
 
 
 Compiler workshop:
 http://petermodzelewski.blogspot.com/2008/10/tango-conference-20
8-compiler-and.html 
 


Cool!
/me needs to play deadlock :-/
Nov 06 2008
prev sibling next sibling parent reply bearophile <bearophileHUGS lycos.com> writes:
Peter Modzelewski:

 You can download the slides from:
 http://team0xf.com/conference/gamedev.pdf


The serialization example, page 21 of the slides, is interesting. The
API/syntax they use doesn't look too much readable, but such functionality is
probably quite useful in certain kinds of D programs. So D may enjoy a little
more handy ways to manage its reflective information. Avoiding most of such
serialization hack.


The following code is cleaned/improved from the OMG:
http://team0xf.com:8080/omg/file/aca17fefefc1/core/Algebra.d
But does it work? Strings turns up being "summable", but if you actually add
them you get an "Array operations not implemented" error:

import std.stdio: writefln;

template isRingType(T) {
    const bool isRingType = is(typeof(T.init + T.init)) &&
                            is(typeof(T.init - T.init)) &&
                            is(typeof(T.init * T.init));
}

template isFieldType(T) {
    const bool isFieldType = isRingType!(T) && is(typeof(T.init / T.init));
}

template isSummable(T) {
    const bool isSummable = is(typeof(T.init + T.init));
}

void main() {
    writefln( isSummable!(string) );
    writefln( isRingType!(string) );
    //writefln( string.init + string.init ); // test.d(20): Error: Array
operations not implemented
}

Bye,
bearophile
Nov 06 2008
parent reply Tom S <h3r3tic remove.mat.uni.torun.pl> writes:
bearophile wrote:

 The serialization example, page 21 of the slides, is interesting. The
API/syntax they use doesn't look too much readable, but such functionality is
probably quite useful in certain kinds of D programs. So D may enjoy a little
more handy ways to manage its reflective information. Avoiding most of such
serialization hack.


I'd be more than happy to see some wider support from D in this regard, 
but for now we're stuck with D1 and such hacks ;)



 The following code is cleaned/improved from the OMG:
 http://team0xf.com:8080/omg/file/aca17fefefc1/core/Algebra.d
 But does it work? Strings turns up being "summable", but if you actually add
them you get an "Array operations not implemented" error:


Ah well, SFINAE fails here :P No sane person will be using these for 
strings anyway ;) The traits are used mostly to be inline documentation 
about what features the user defined type must provide.


-- 
Tomasz Stachowiak
http://h3.team0xf.com/
h3/h3r3tic on #D freenode
Nov 06 2008
parent reply bearophile <bearophileHUGS lycos.com> writes:
Tom S:


I'd be more than happy to see some wider support from D in this regard,<


If no one discusses about this, things aren't going to improve. I'll post
something related to this to the main D newsgroup soon.



Ah well, SFINAE fails here :P<


But the interesting question is why does it fail? It seems a bug of DMD, not a
bug in that code.



No sane person will be using these for strings anyway ;) The traits are used
mostly to be inline documentation <about what features the user defined type
must provide.<


It looks like generic library code, so you can't assume a sane person, so I
suggest you to put unittests, that contain such case too. You may even add a
static if to work around such "common" bug (I know, isSummable() is absent from
your code):

template isSummable(T) {
    // BUG: IsArray!(T) is added to patch a possible bug of DMD v.1.036
    const bool isSummable = !IsArray!(T) && is(typeof(T.init + T.init));
}

template isRingType(T) {
    const bool isRingType = isSummable!(T) &&
                            is(typeof(T.init - T.init)) &&
                            is(typeof(T.init * T.init));
}

template isFieldType(T) {
    const bool isFieldType = isRingType!(T) && is(typeof(T.init / T.init));
}

Writing very reliable "library" code (bulletproof, if possible) avoids you bugs
later in all the code that uses that library code. Adding lot of unittests
(covering even weird corner cases) to every function, class and template helps.

Bye,
bearophile
Nov 06 2008
parent Tom S <h3r3tic remove.mat.uni.torun.pl> writes:
bearophile wrote:

 Writing very reliable "library" code (bulletproof, if possible) avoids you
bugs later in all the code that uses that library code. Adding lot of unittests
(covering even weird corner cases) to every function, class and template helps.


It is meant to be reliable, but not paranoid. You assume that the coder 
has too much time on his hands :P I see no reason anyone would want to 
create a 3d vector of strings for use with OMG.


-- 
Tomasz Stachowiak
http://h3.team0xf.com/
h3/h3r3tic on #D freenode
Nov 07 2008
prev sibling parent Mikola Lysenko <mikolalysenko gmail.com> writes:
My favorite talk of the whole conference!  Great job guys!

-Mik

Peter Modzelewski Wrote:


 Talk from Tango Conference 2008 performed by me and Tomasz Stachowiak:
 http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008-team0xf-talk.html
 You can download the slides from:
 http://team0xf.com/conference/gamedev.pdf
 
 Other videos:
 DReactor:
 http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008-dreactor-talk.html
 
 DWT:
 http://petermodzelewski.blogspot.com/2008/11/tango-conference-2008-dwt-talk-video.html
 
 MiniD:
 http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-minid-talk-video.html
 
 Fibers:
 http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-fibers-talk-video.html
 
 Compiler workshop:
 http://petermodzelewski.blogspot.com/2008/10/tango-conference-2008-compiler-and.html
Nov 08 2008