> Smalltalk (presumably) has a form of logical branching in it somewhere. To finish the if, just pick one.
It uses dynamic binding.
In Java it would look like something this (but it's less useful without proper closures):
abstract class Bool {
void ifTrue(Runnable f, Runnable g);
}
class True extends Bool {
void ifTrue(Function f, Function g) {
f.run();
}
}
class False extends Bool {
void ifTrue(Function f, Function g) {
g.run();
}
}
Then, given a variable
Bool b;
the if-then-else becomes
b.ifTrue(new Runnable() {
public void run() {
System.out.println("It's true!");
}
}
, new Runnable() {
public void run() {
System.out.println("Not true!");
}
}
);
It's a bit more verbose, though...
