Kusanagi

The initial work on this project was funded by the Origyn Foundation.

CoffeeScript style syntax for the Motoko language. Try Kusanagi

import State "State"

module
  public class Grid(state : State.State)
    let grid = state

    let n = grid.size()

    public func size() : Nat
      n

    func nextCell(i : Nat, j : Nat) : State.Cell
      let l : Nat = living i, j
      if get i, j
        l == 2 or l == 3
      else
        l == 3

    func next(dst : Grid)
      for i in grid.keys()
        let cool = true

        for j in grid[i].keys()
          let yo = "wat"
          dst.set i, j, nextCell i, j

Get Started

npm install -g kusanagi
kusanagi < src.ku > out.mo

Features

• Indentation based blocks
• Let shorthand x = 5 -> let x = 5
• Alternative with syntax

  let x = {
    ...a
    ...b
  }

  becomes

  let x = {
    a and
    b
  }

• Chained comparisons

  x < y <= z

  Becomes

  x < y and y <= z

• match

  match x, #nat(val), 0
  ---
  switch(x) {
    case(#nat(val)) { val };
    case(_){ 0 }
  };

• take

  take x, 0
  ---
  switch(x) {
    case(null) { 0 };
    case(?val) { val }
  };

• Null soaks

  student.classes?.get(classID)
  ---
  do?{student.classes!.get(classID)};