AAL Closures

With Closures an inplace class can be defined.

Content of this chapter:

Definition
Samples

Definition

new (ClosureParams) SuperDecls { Statements }

Samples

int i;
new (i) { public int getI() { return i; } }
new (membername: 42) { public int getI() { return membername; }

Closure, which can be used as instance

  interface IntAdder { public int operator+(int j); }
  int i = 42;
  IntAdder adder = new (i) implements IntAdder
                      {
                        public int operator+(int j) { return i + j; }
                      };
  int j = adder + 4;
  // j == 46

  // This Code will internally tranformed to:
  class Closure1 extends IntAdder
  {
    public Closure1(int i_) : i(i_) {}
    public int operator+(int j) { return i + j; }
  }
  IntAdder adder = new Closure1(i);

Closure as simple code block

  interface Dumper { public void operator()(String s); }
  Dumper dumper = new () implements Dumper
                      {
                        public void operator()(String s) { System.out.println(s); }
                      };
  dumper("asdf");