Pizza (programming language)

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For other uses, see Pizza (disambiguation).
Paradigm generics, algebraic types
Influenced by
Generic Java, Scala[1]

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

In August 2001, the developers made a compiler capable of working with Java. 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 Generic Java project, another attempt to add generics to Java which was eventually adopted into the official language version 1.5. The pattern matching and other functional programming-like features have been further developed in the Scala programming language. Martin Odersky remarked, "we wanted to integrate the functional and object-oriented parts in a cleaner way than what we were able to achieve before with the Pizza language. [...] In Pizza we did a clunkier attempt, and in Scala I think we achieved a much smoother integration between the two."[2]


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


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