3DICC / SqueakNim

  # This import adds macros to generate FFI Smalltalk code
  import squeaknim
  
  # Just compile with "nim c Test1.nim", copy resulting lib and Test1.st
  # to a Squeak directory, file in Test1.st and then it should be fine

  # to call foo, see class side of Test1

  
  type
    MyFloat = float32
    Vector3* = object
      x*, y*, z*: MyFloat
  
  # This sets the name of the FFI module (and class) and a Smalltalk prefix
  # to avoid collisions for generated classes, like Vector3 which turns into
  # URVector3 in Smalltalk
  setModulename "Test1", "UR"
  
  # Generate the Smalltalk class URVector3 representing Vector3

  wrapObject(Vector3, true)

  # Generate declarations for Smalltalk code

  writeExternalLibrary()
  
  # Here follows Nim procedures that will be callable via FFI
  # Note that exportSt pragma to export.
  

  proc foo*(a, b: Vector3, c: int): cstring {.exportSt.} =

    # Just a silly test proc
    result = "x plus y plus c " & $(a.x + b.y + c.float)
  
  # Write the Smalltalk code to file

  writeSmalltalkCode("Test1.st")