dclass.nim

{.experimental: "codeReordering".}
# import macros
import dali
# import jni_wrapper

# let
#   HelloActivity = jtype com.akavel.hello2.HelloActivity
#   Activity = jtype android.app.Activity
#   Bundle = jtype android.os.Bundle
#   String = jtype java.lang.String
let
  Activity = "Landroid/app/Activity;"
  HelloActivity = "Lcom/akavel/hello2/HelloActivity;"
  Bundle = "Landroid/os/Bundle;"
  TextView = "Landroid/widget/TextView;"
  System = "Ljava/lang/System;"
  String = "Ljava/lang/String;"
  Context = "Landroid/content/Context;"
  View = "Landroid/view/View;"
  CharSequence = "Ljava/lang/CharSequence;"
  Long = "Ljava/lang/Long;"

# TODO 1:
#  1. this.nimSelf = (long)42
#  2. v2/3 = this.nimSelf
#  3. v1 = ltoa(v2/3)
#  4. return v1
# TODO 2:
#  - same as above, but steps 2+3 are implemented in stringFromJNI()

classes_dex "dclass.dex":
  dclass com.akavel.hello2.HelloActivity {.public.} of Activity:
    # proc `<clinit>`() {.static, constructor, regs:2, ins:0, outs:1.} =
    #   # System.loadLibrary("hello-mello")
    #   const_string(0, "hello-mello")
    #   invoke_static(0, jproto System.loadLibrary(String))
    #   return_void()
    proc `<init>`() {.public, constructor, regs:1, ins:1, outs:1.} =
      invoke_direct(0, jproto Activity.`<init>`())
      return_void()
    proc onCreate(_: Bundle) {.public, regs:4, ins:2, outs:2.} =
      # ins: this, arg0
      # super.onCreate(arg0)
      invoke_super(2, 3, jproto Activity.onCreate(Bundle))
      # v0 = new TextView(this)
      new_instance(0, TextView)
      invoke_direct(0, 2, jproto TextView.`<init>`(Context))
      # # v1 = this.stringFromJNI()
      # #  NOTE: failure to call a Native function should result in
      # #  java.lang.UnsatisfiedLinkError exception
      # invoke_virtual(2, jproto HelloActivity.stringFromJNI() -> String)
      # move_result_object(1)
      invoke_virtual(2, jproto HelloActivity.stringFromField() -> String)
      move_result_object(1)
      # v0.setText(v1)
      invoke_virtual(0, 1, jproto TextView.setText(CharSequence))
      # this.setContentView(v0)
      invoke_virtual(2, 0, jproto HelloActivity.setContentView(View))
      # return
      return_void()
    # proc stringFromJNI(): jstring {.public, native.} =
    #   return jenv.NewStringUTF(jenv, "Hello from Nim dclass :D")

    proc stringFromField(): jstring {.regs:4, ins:1, outs:3.} =
      # this.nimSelf = (long)42
      const_wide_16(0, 42'i16)
      iput_wide(0, 3,
        Field(class:HelloActivity, typ:"J", name:"nimSelf"))
      # v1..2 = this.nimSelf
      iget_wide(1, 3,
        Field(class:HelloActivity, typ:"J", name:"nimSelf"))
      # v0 = Long.toString(v1..2)
      invoke_static(1, 2, jproto Long.toString(jlong))
      move_result_object(0)
      # return v0
      return_object(0)

# dumpTree:
#   var foo, bing: seq[int]
#   var
#     bar: seq[int] = @[1,2]
#     baz = @[3,4]

# dumpTree:
#   if foo =~ Ident([]):
#     while bar =~ Biz(_):
#       discard