A simple statically typed language that should be easily compiled to dynamically typed languages

Build Status

Entities should not be multiplied unnecessarily.

-- William of Ockham

For example, many languages has these entites

• variables

   var foo = 1;
   var bar = 2;
  

• parameters

   function (foo,bar) { return foo + bar; }
  

• objects

   {foo : 1, bar : 2}
  

• tuples

   (1,2)
  

Oczor uses records instead of all these entities

x1 = 1
x2 = 
 foo = 1
 bar = 1
func x y = x + y + 1
x3 = func 1 2
func2 x = 
 temp = x == 1
 in not (temp && false)

 var x1 = 1;
 var x2 = {
 foo : 1,
 bar : 1
 };
 var func = function(x,y){
 return x + y + 1;
 };
 var x3 = func(1,2);
 var func2 = function(x){
 var temp = x === 1;
 return !(temp && false);
 };

• Lua
• Ruby
• Emacs Lisp

Most syntax constructions have two options - comma or indent separation

x = (foo = 1, bar = 2)
type Cat = name : String, age : Int

x = 
 foo = 1
 bar = 2
type Cat = 
 name : String
 age : Int
 

x = (foo = 1, bar = 2)

print x.foo
print x.bar

y = x with (foo = 2)

Tuple is a record with labels itemN

x = (2,3)

same as

x = (item1 = 2, item2 = 3)

Destructuring assignment

x = (2,3)
(y,z) = x
print y

x = (foo = 1, bar = 2)
 
(foo = y, bar = z) = x
print y

x y => (x,y) or \x y => (x,y) -- \ is optional

function definition is a syntax sugar for a label with anonymous function

foo x y = (x,y)

same as

foo = \x y => (x,y)

z = foo 1 2

For example, it is possible to group functions like this

bar = 
 foo x y = (x,y)
 id z = z

bar.foo 1 2
bar.id 1

Parameters can be matched with literals, tuples, records or external variables

x = 1
foo = case
 1 => 2
 (x,2) => 3
 (foo = x, bar = 3) => 4
 ^x => 5

inc : Int => Int
inc = add _ 1
x = inc 1

function eqAny(x,y) {
 return x === y;
}

ffi eqAny : a, a => Bool

infix == 4 eqAny
x = if 1 == 2 then 1 else 2 

type Cat = 
 name : String
 age : Int

cat = (name = "Tiger", age = 25)

type Number = Int | Double
x : Array Number
x = [1, 2.0, 3]

ffi eqInt : Int, Int => Bool
ffi eqString : String, String => Bool
class equal a : a => Bool
instance Int equal x y = eqInt x y
instance String equal x y = eqString x y
infix == 4 equal
x = 1 == 1
y = "foo" == "foo"

Alpha/Experimental

1. Install stack.

2. clone or download this repository

3. In project directory run

   stack setup
   stack install
   

   stack install will install the occ executable into ~/.local/bin, which you should add to your PATH.

1. create a directory hello

2. copy std directory from libs directory

3. create a file hello.oc

   import std
   print "hi"
   

4. run occ to compile hello.oc

   occ hello.oc
   

   hello.js should be in output directory

5. hello.js can be run with node

   node output/hello.js
   

   should print hi

6. occ --help to display the compiler options