Nimrod - @Keyword for OOP

gistfile1.nim

macro class* (head:expr, body:stmt): stmt @keyword =
  ## builds OOP-style type/procs...
  # @keyword makes this behave in the following ways..
  # - is compiled (no VM) for compile-time performance
  # - is used with '=' instead of ':' (like 'proc' not 'for')

macro init* (head:expr, params:expr{param}, body:stmt): stmt @keyword =
  ## builds OOP-style alloc/init procs for a type
  # NOTE: {param} means 'params' only accepts parameter syntax (a:T, b:U, ...)

# ---

type Person*: ref object @inheritable =
  name*: string
  age*: int

# ---

class Person* @inheritable =
  var
    name*: string
    age*: int
  
  init new*(name:string, age = 0) =
    this.name = name
    this.age = age
  
  proc greet* @pure =
    echo "Hello, I'm ", name, "."
    echo "I am ", age, " years old."

# ---

var philip = Person.new("Philip Witte", 26)
philip.greet()