[chuck] version (dracula) released

Ge Wang gewang at CS.Princeton.EDU
Thu Aug 25 09:07:57 EDT 2005

Dear All,

chuck- is released. (Sorry.)  This is the "v2" major release.  
Additions include arrays, objects and classes, events, and more.  A 
full list of new and updated features can be found at the end of this 


We have also put together a draft of a language specification 
(finally).  It is not complete yet and will be improved as (real) time 
is advanced:


We have been testing this release along the way.  However, since this 
is the initial release, there is probably a healthy amount of egregious 
bugs!  Please let us know if you run into anything fishy (email one of 
us directly, post to chuck-dev or the newly created chuck-users list).  
Same goes for the documentation.  Actually, any type of feedback would 
be greatly appreciated.

Many thanks to the great people who have contributed ideas, code, and 
time to this release!  Thanks to everyone for being so patient with 
this release.

Development shall continue as we fix the bugs, add new features (and 
more bugs).

Please let us know if you run into any problems.  HappY ChucKing!

ChucK Team
(Perry, Ananya, Phil, Adam, Ajay, Ge ...)


   - (added) +=>, operator : 2 +=> i; (also) -=>, *=>, /=>, %=>
   - (added) @=> for explicit assignment
     this is the only way to make object reference assignments
   - (added) implicit int to float casting
   - (changed) cast now look like: 1.1 $ (int) => int i;
   - (added) function call by chucking :
     // call
     (1,4) => math.rand2f => result;
     // same as
     math.rand2f(1,4) => result;

   - (fixed) type system for existing types
   - (added) forward lookup of classes and functions (mutual recursion)
   - (added) stack overflow detection for massive recursion

   - (added) language specification:

   - (added) --probe prints all audio and MIDI devices
   - (added) --log or --verbose logs compiler and virtual machine
   - (added) --logN or --verboseN multi level logging
     1 - least verbose
     10 - most verbose

   - (added) 'class' definitions : class X { int i; }
   - (added) 'extends' keyword : class Y extends Event { int i; }
   - (added) virtual/polymorphic inheritance
   - (added) added pre-constructors - code at class level
     gets run when object is instantiated
   - (added) function overloading :
     class X { fun void foo() { }  fun void foo( int y ) { } }
   - (added) base classes (can be extended):
     Object, Event, UGen
     see below
   - (added) base classes (cannot be extended):
     array, string
     see below
   - (added) member data
   - (added) static data
   - (added) member functions
   - (added) static functions

   - (added) base Event class : Event e;
     can be used directly
     can be extended to custom events
     (see one_event_many_shreds.ck)
   - (added) waiting on event, chuck to now :
     e => now; // wait on e
   - (added) e.signal() wakes up 1 shred, if any
   - (added) e.broadcast() wakes up all shreds waiting on e
   - (added) class MidiEvent (see gomidi2.ck)
     alternative to polling.
   - (added) class OSCEvent

   - (added) arrays : int a[10]; float b[20]; Event e[2];
   - (added) multidimensional arrays : int a[2][2][2];
   - (added) associative arrays : int a[10]; 0 => a["foo"];
     all arrays are both int-indexed and associative
   - (added) array initialization : [ 1, 2, 3 ] @=> int a[];
   - (added) .cap() for array capacity
   - (added) .find() test if item is associative array
   - (added) .erase() erase item in associative array

   - (added) class UGen
     can be extended
   - (changed) all ugen parameters are now also functions:
     // set freq
     440 => s.freq => val;
     // same as...
     s.freq( 440 ) => val;
   - (changed) left-most parameters must now be called as functions
     // no longer valid
     f.freq => float val;
     // valid
     f.freq() => float val;
     // still ok
     440 => s.freq => float val;

   - (added) class Shred
   - (added) .yield() .id()

   - (added) class string

   - (added) stereo
     all stereo unit generators have .left, .right, .pan functions
   - (changed) stereo ugen: dac (2 in, 2 out)
   - (changed) stereo ugen: adc (0 in, 2 out)
   - (added) stereo ugen: pan2 take mono or stereo input and pans
   - (added) stereo ugen: mix2 mix stereo input into mono

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