ref-strict

Add strict typing for ffi types

ref-strict

adds strict typing layer on to ffi on a per type basis, especially helpful if you are binding a library with opqaue pointers and want to ensure that what is being passed to the native layer is indeed the proper type

var voidPtr = ref.refType(ref.types.void)
var myType = StrictType(voidPtr)
 
var l = ffi.Library(mylib, {
  myType_init: [myType, []],
  otherType_init: [voidPtr, []],
  some_method: [ref.type.void, [myType]],
})
 
var m = l.myType_init()
var o = l.otherType_init()
 
// will throw 
l.some_method(o)
 
// will succeed 
l.some_method(m)
 
// will succeed but cause you all kinds of pain 
l.some_method(myType.cast(o))