class, cover, interface, implement, func, abstract, extends, from, this, super, new, const, final, static, include, import, use, extern, inline, proto, break, continue, fallthrough, operator, if, else, for, while, do, switch, case, as, in, version, return, true, false, null, default

(note: things like 'new', and 'this' aren't really keywords, they are proper functions and variables, but it's still useful they stand out in syntax highlighting, for readability. Also a few other keywords aren't implemented yet, but reserved.)

+, -, *, /, +=, -=, *=, /=, =, :=, ==, !=, !, %, ?, >, <, >=, ⇐, &&, ||, &, |, ^, ., ~, .., », «, »>, «<, »=, «=, »>=, «⇐

(note, '.' is the chaining operator in ooc, not the 'member access' one. To access a member of an object, just whitespace is needed as in Io, e.g. "dog name", or "dog barf()")

• string: "hi world\n"
• char: 'c', '\0' (same escape sequences as C)
• decimal: 234
• hexa: 0xdeadbeef
• octal: 0c777
• binary: 0b1011
• float: 3.14, 0.
• array literal: [1, 2, 3]
• range literal: 0..10

• Int, Int8, Int16, Int32, Int64, Int80, Int128
• UInt, UInt8, UInt16, UInt32, UInt64, UInt80, UInt128
• Octet, Short, UShort, Long, ULong, LLong, ULLong
• Float, Double, LDouble, Float32, Float64, Float128
• Char, UChar, WChar, String
• Void, Pointer, Bool, SizeT, This

(Note about 'This': it refers to the current type being defined, e.g. a clone method would be defined like clone: func → This { /* return a copy */ })

(Note 2: some types above are redundant, some will be deprecated soon, but coloring all of them can't harm.)

include header1, path/header2
include ./mylocalheader
import my/package/MyModule
import my/package/[MyModule1, MyModule2]
use mylib, mylib2

No backslashes, even on windows.

// single-line comment
/* multi-line comment */
/** oocdoc comment (a-la javadoc/doxygen), with @tags */

myFunction()
myFunction(arg1, arg2)
myObject doThing()
MyClass callStaticMethod()

i: Int // variable declaration
i = 3 : Int // variable declaration + assignment
i := 3 // variable declassignment. (the type is guessed)
a, b, c: Int // declare three variables
// useful for bitfields:
OPTION1 = 1, OPTION2 = 2, OPTION3 = 4, OPTION4 = 8 : const Int

3.14 as Int // casting

add: func (a: Int, b: Int) -> Int {
  return a + b
}

add: func (a, b: Int) -> Int { a + b } // multi-decl, and return is optional.
exit: extern func  // no '->' = void func, extern = defined elsewhere

Animal: class {
  name: String
  age := 0

  /** Simple constructor with a member-assign-argument */
  init: func (=name) {}
  // equivalent to
  // init: func (name: String) { this name = name }

  /** Another constructor, we need to choose a suffix, here 'withAge' */
  init: func ~withAge (.name, =age) {
    this(name) // call another constructor
  }
  // equivalent to
  // init: func (name: String, age: Int) { this(name); this age = age }

  /** An abstract function, should be implemented by child classes */
  shout: abstract func
  // note: if we have no arguments, we don't need parenthesis
  // (heh, that's what the 'func' keyword is for!)
}

Dog: class extends Animal {

  shout: func {
    "Woof, woof!" println()
  }

}

Ant: class {
  total = 0 : static Int
  init: func { total += 1 }
  getTotal: static func -> Int { total }
}

main: func {
  list := ArrayList<Ant>
  for(i in 0..20) {
    list add(Ant new())
  }
  printf("Created %d ants in total!\n", Ant getTotal())
}

// this translates to a simple typedef
Int: cover from int

// typedef here..
String: cover from Char* {

  // and define the String_println(String this) function here. (in C)
  println: func {
    printf("%s\n", this)
  }

}

Button: cover from GtkButton extends Window {

  // inheritance works almost the same as with classes, e.g.
  // you can call methods from its super-cover

}

// Compound cover =)
Color4f : cover {
  r, g, b, a: Float
}

Message: class {
  content: String
}

Printable: interface {
  print: func
}

implement Printable for Message {
  print: func {
    content println()
  }
}

operator + (left, right: String) -> String {
  // note: this is a horrible implementation, but it's just for the example
  return strcat(strdup(left), right)
}

main: func {
  ptr := gc_malloc(Int size) as Int*
  ptr@ = 42
  printf("ptr's value is %d\n", ptr@)
  add(ptr, 3)
  printf("ptr's value is now %d\n", ptr@)
}

add: func(ptr: Int*, value: Int) {
  ptr@ += value
}

main: func {
  ptr := gc_malloc(Int size) as Int* // alloc an int on the heap
  ptr@ = 42
  printf("ptr's value is %d\n", ptr@)
  add(ptr, 3)
  printf("ptr's value is now %d\n", ptr@)
}

add: func(ptr: Int@, value: Int) {
  ptr += value
}

main: func {
  number := 42 // alloc an int on the stack
  printf("number is %d\n", number)
  add(number&, 3)
  printf("number is now %d\n", number)
}

add: func(ptr: Int@, value: Int) {
  ptr += value
}

for(i in 0..10) {
  printf("%d, ", i)
}

also, for collections

list := ArrayList<Int> new() .add(1) .add(2) .add(3)
for(i in list) {
  printf("%d, ", i)
}

Can also be a decl before the 'in', e.g.

for(i: UInt in 0..10) {
  printf("%d, ", i)
}

action: Func // a dumb function pointer

doThing: func {
  "Oh, really?" println()
}

action = doThing

action() // call action, thus call doThing

applyOperator: func(operator: Func (Int, Int) -> Int, left, right: Int) {
  return operator(left, right)
}

add: func (left, right: Int) { left + right }
sub: func (left, right: Int) { left - right }
mul: func (left, right: Int) { left * right }
div: func (left, right: Int) { left / right }

printf("1 + 2 = %d\n", applyOperator(add, 1, 2))
printf("10 - 5 = %d\n", applyOperator(sub, 10, 5))
printf("6 * 7 = %d\n", applyOperator(mul, 6, 7))
printf("10 / 2 = %d\n", applyOperator(div, 10, 2))

list := ArrayList<Int> new()
list add(1) .add(2) .add(3)

butt := Button new()
butt connect("clicked", func { "Button clicked!" println() })

printType: func <T> (param: T) {
  printf("Got param of type %s and size %d\n", T name, T size)
  if(T == Int) printf("It's an Int! and its value is %d\n", param as Int)
  else if(T == Char) printf("It's a char! and its value is '%c'\n", param as Char)
}

printType('c')
printType(42)

Got param of type Char and size 1
It's a char! and its value is 'c'
Got param of type Int and size 4
It's an Int! and its value is 42

Container: class <T> {
  content: T
  init: func(=content)
  get: func -> T { content }
  set: func(=content)
}

main: func {

  cont1 := Container<Int> new(42)
  number := cont1 get()
  printf("number is an %s, and its value is %d\n", number class name, number)

  cont2 := Container<String> new("Hi, world!")
  message := cont2 get()
  printf("message is a %s, and its value is %s\n", message class name, message)

}

number is an Int, and its value is 42
message is a String, and its value is Hi, world!

mark := stdin readLine() toInt()
match mark {
  case 0 => println("Oh, that's bad.")
  case 1 =>
    // there can be several statements
    mark = 3
    println("There, I helped you a little")
  case 2 => 
    println("So you like middles?")
  case => // default case
    println("Now what is that value?")
}

Note: there is a 'fallthrough' reserved keyword, which isn't implemented yet.

match can be used as an expression:

hello := match 42 { case 42 => "Hello!" }

match without an expression is the equivalent of match true {}

isPositive: func (i: Int) -> Int {
  return match {
    case (i > 0) => 1
    case (i < 0) => -1
    case => 0
  }
}

(parenthesis added for readability, but not actually needed)

Math: class {
  PI := const static 3.14159
}

Container: class {
  content: Pointer
  /** inline keyword: same meaning as C */
  getContent: inline func -> Pointer { content }
}

/** proto keyword adds function prototypes int the generated C file, e.g. when you're missing a header. */
usleep: extern proto func -> Int

c_exit extern(exit) func

main: func {
  c_exit(); // translates to exit() in C
}

for member functions (ie. methods)

include stdlib

String: cover from char* {
  length: extern(strlen) func -> Int
}

"blah" length() toString() println()

arr := [1, 2, 3] // array of ints, typed Int*

// the type is determined by the first element
arr2 := [1 as UInt, 2, 3] // typed UInt*

// this is invalid:
Dog: class {}
arr3 := [1, 2, 3, Dog new()] // error, incompatible type