Lambdas

Lambda (anonymous) functions may appear in expressions as:

\(a:A, b:B) -> C {
  c:C;
  // do something
  return c;
}

The type of such a lambda is \(A, B) -> C. It is possible to declare a variable of this function type:

f:\(A, B) -> C;

to assign values to it:

f <- \(a:A, b:B) -> C {
      c:C;
      // do something
      return c;
    };

and to call it:

f(a, b);

Functions can accept lambdas as arguments. Such a function may be declared:

function g(f:\(A, B) -> C) -> D {
    d:D;
    // do something
    return d;
}

and be called with:

g(\(a:A, b:B) -> C {
      c:C;
      // do something
      return c;
    });

or, if the lambda was previously assigned to a variable f:\(A, B) -> C as above:

g(f);