add NewMessage / Frame instructions (without actual implementation)

lib/ast/call_site_expression.rb

@@ -6,16 +6,18 @@ module Ast
 
     def compile method , message
       me = receiver.compile( method, message )
+      method.add_code Virtual::NewMessage.new
       method.add_code Virtual::Set.new(Virtual::NewSelf.new(me.type), me)
       method.add_code Virtual::Set.new(Virtual::NewName.new(), Virtual::StringConstant.new(name))
       compiled_args = []
       args.each_with_index do |arg , i|
         #compile in the running method, ie before passing control
         val = arg.compile( method, message) 
-        compiled_args << val
         # move the compiled value to it's slot in the new message
+        to = Virtual::NewMessageSlot.new(i ,val.type , val)
         # (doing this immediately, not after the loop, so if it's a return it won't get overwritten)
-        method.add_code Virtual::Set.new(Virtual::NewMessageSlot.new(i ,val.type ) , val )
+        method.add_code Virtual::Set.new(to , val )
+        compiled_args << to
       end
       method.add_code Virtual::MessageSend.new(name , me , compiled_args) #and pass control
       # the effect of the method is that the NewMessage Return slot will be filled, return it