andyscott

use std::rc::Rc;

trait HKT<U> {
    type C; // Current type
    type T; // Type with C swapped with U
}

macro_rules! derive_hkt {
    ($t:ident) => {
        impl<T, U> HKT<U> for $t<T> {

andyscott

Advanced Functional Programming with Scala - Notes

Copyright © 2017 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

andyscott

/**
 * Originally authored by Jason. Updated by me (Andy) to work in Scala 2.9 RC1
 *
 * @author Jason Zaugg (aka retronym), Andy Scott
 */
object InterpreterUtil {
  import scala.tools.nsc.interpreter._
  import scala.tools.nsc.interpreter.Results._
  import scala.tools.nsc.Settings