Pizza (programming language)

From Wikipedia, the free encyclopedia

Pizza is an open-source superset of the Java programming language with the following new features:

Generics
Function pointers
Class cases and pattern matching (a.k.a Algebraic types)

In August 2001 the developers made a compiler capable of working with Java. Speed tests have shown the Pizza compiler works twice as fast as the Java compiler, but as it currently performs no optimization the resulting application is rather cumbersome. Most Pizza applications can run in a Java environment, but certain cases will cause problems.

Work on Pizza has more or less stopped since 2002. Its main developers have concentrated instead on the GJ project, another attempt to add generics to Java which was eventually adopted into the official language version 1.5.

[edit] Example

Taken from [1].

public final class Main {
  public int main(String args[]) {
    System.out.println(
      new Lines(new DataInputStream(System.in))
        .takeWhile(nonEmpty)
        .map(fun(String s) -> int { return Integer.parseInt(s); })
        .reduceLeft(0, fun(int x, int y) -> int { return x + y; }));
  }
}