I think you'll find that Scala has already beaten you to it! As a language, it already supports many of your requested features, or the ability to implement them via an internal DSL.
On 13 July 2010 00:41, Dibyendu Majumdar <[email protected]> wrote: > Hi, > > I am thinking of creating a Google Go type language which can run on > the JVM. The goal is to keep to the features supported efficiently in > Java but (taking inspiration from Go), reduce the verbosity in the > language, and perhaps add some concurrency features to the language. > > The key ideas that I would like to implement in the new language are: > - static type inference (I am aware of the arguments for/against but > on balance prefer to support this, while allowing explicit type > declarations where needed). > - channels - add syntactic support for creating either a synchronous > or buffered queue (using standard Java concurrency library) > - maps - syntactic support for hash maps > - tasks - syntactic support for submitting tasks to a thread pool - > using the concurrency library > - convention over boilerplate - like Go, if an identifier starts with > a capital, make it automatically public, else private, and use similar > techniques to reduce boilerplate stuff > - static methods should not have to be declared in a class - to > automatically create a default class per package to hold static > methods - there may be better ways of doing this though. > > Features that I am not planning to implement: > - Go interfaces > - Ability to select on channels > - Or any thing else that does not map directly to a feature in Java. > > To illustrate what inspires me to create this language, I am quoting > below code from two simple programs, one in Go, another in Java. They > are equivalent, but the Java version is much more verbose (which some > people may like). > > I would like to know if anyone else here has looked at Go and is > working on implementing such a language on the JVM. Also, as I am new > to this, is there a language implementation that I could use as a > starting point (I was looking at phpreboot for instance) for hacking. > > BTW, the Java version of the program below is 10 times faster than the > Go version. > > Thanks and Regards > Dibyendu > > ---------- Go version ------------- > > func producer(c1 chan int, N int, s chan bool) { > for i := 0; i < N; i++ { > c1 <- i > } > s <- true > > } > > func consumer(c1 chan int, N int, s chan bool) { > for i := 0; i < N; i++ { > <-c1 > } > s <- true > > } > > func unbufProdCons(N int) { > c1 := make(chan int) > s := make(chan bool) > > go producer(c1, N, s) > go consumer(c1, N, s) > > <-s > <-s > } > > ----------- Java version ------------ > > static final class Producer implements Runnable { > final SynchronousQueue<Integer> c1; > final int N; > final SynchronousQueue<Boolean> s; > > Producer(SynchronousQueue<Integer> c1, int N, > SynchronousQueue<Boolean> s) { > this.c1 = c1; > this.N = N; > this.s = s; > } > > public void run() { > try { > for (int i = 0; i < N; i++) { > c1.put(i); > } > s.put(true); > } catch (InterruptedException e) { > e.printStackTrace(); > System.exit(1); > } > } > } > > static final class Consumer implements Runnable { > final SynchronousQueue<Integer> c1; > final int N; > final SynchronousQueue<Boolean> s; > > Consumer(SynchronousQueue<Integer> c1, int N, > SynchronousQueue<Boolean> s) { > this.c1 = c1; > this.N = N; > this.s = s; > } > > public void run() { > try { > for (int i = 0; i < N; i++) { > c1.take(); > } > s.put(true); > } catch (InterruptedException e) { > e.printStackTrace(); > System.exit(1); > } > } > } > > public static void main(String args[]) throws Exception { > // warmup > SynchronousQueue<Integer> c1 = new > SynchronousQueue<Integer>(); > SynchronousQueue<Boolean> s = new SynchronousQueue<Boolean>(); > final int N = 50; > > Thread t1 = new Thread(new Producer(c1, N, s)); > Thread t2 = new Thread(new Consumer(c1, N, s)); > t1.start(); > t2.start(); > > s.take(); > s.take(); > t1.join(); > t2.join(); > } > > > -- > You received this message because you are subscribed to the Google Groups > "JVM Languages" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<jvm-languages%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/jvm-languages?hl=en. > > -- Kevin Wright mail/google talk: [email protected] wave: [email protected] skype: kev.lee.wright twitter: @thecoda -- You received this message because you are subscribed to the Google Groups "JVM Languages" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jvm-languages?hl=en.
