Syntax for Harbour
==================

Constants
---------

Concrete:

    42

Abstract:

    (constant 42)

Variable usages
---------------

Concrete:

    moo

Abstract:

    (variable moo)

Variable declaration
--------------------

Concrete:

    var moo

Abstract:

    (defvar moo)

Assignments
-----------

Concrete:

    moo = 42

Abstract:

    (assign moo
      (constant 42))

Function calls
--------------

Concrete:

    meh(42)

Abstract:

    (call meh
      (constant 42))

Sequences
---------

Concrete:

    42
    43
    44

Abstract:

    (seq
      (constant 42)
      (constant 42)
      (constant 42))

Returns
-------

Concrete:

    return 42

Abstract:

    (return
      (constant 42))

Function definitions
--------------------

TODO add support for arguments

Concrete:

    fun moo
      foo
      bar
      return 42
    end

Abstract:

    (deffun moo
      (seq
        (variable foo)
        (variable bar)
        (return
          (constant 42))))

Conditionals
------------

TODO write me

Loops
-----

TODO write me

Example
-------

    fun other_function
      return 19
    end
    
    fun main
      var i
      i = 4
      other_function()
      return 42
    end