use method missing in resolve method

not just exit
try to print name next

lib/mom/instruction/resolve_method.rb

@@ -62,10 +62,7 @@ module Mom
         branch  while_start_label
 
         add_code exit_label
-        # temporary, need to raise really.
-        factory! << Parfait.object_space.get_factory_for(:Integer)
-        integer_tmp! << factory[:reserve]
-        Mom::Macro.emit_syscall( builder , :died ) #uses integer_tmp
+        MethodMissing.new(compiler.source_name).to_risc(compiler)
 
         add_code ok_label
         cache_entry[:cached_method] << callable_method

lib/mom/macro/init.rb

@@ -1,9 +1,17 @@
 module Mom
+  # Init "method" is the first thing that happens in the machine
+  # There is an inital jump to it, but that's it, no setup, no nothing
+  #
+  # The method is in quotes, because it is not really a method, it does not return!!
+  # This is common to all double underscore "methods", but __init also does not
+  # rely on the message. In fact it's job is to set up the first message
+  # and to call the main (possibly later _init_ , single undescrore)
+  #
   class Init < Macro
     def to_risc(compiler)
       builder = compiler.builder(compiler.source)
       main = Parfait.object_space.get_method!(:Space, :main)
-
+      # Set up the first message, but advance one, so main has somewhere to return to
       builder.build do
         factory! << Parfait.object_space.get_factory_for(:Message)
         message << factory[:next_object]
@@ -11,14 +19,14 @@ module Mom
         factory[:next_object] << next_message
       end
       builder.reset_names
+      # Set up the call to main, with space as receiver
       Mom::MessageSetup.new(main).build_with( builder )
-
       builder.build do
         message << message[:next_message]
         space? << Parfait.object_space
         message[:receiver] << space
       end
-
+      # set up return address and jump to main
       exit_label = Risc.label(compiler.source , "#{compiler.receiver_type.object_class.name}.#{compiler.source.name}" )
       ret_tmp = compiler.use_reg(:Label).set_builder(builder)
       builder.build do
@@ -28,7 +36,7 @@ module Mom
         add_code exit_label
       end
       compiler.reset_regs
-      Macro.exit_sequence(builder)
+      Macro.exit_sequence(builder)  # exit will use mains return_value as exit_code
       return compiler
     end
   end

lib/mom/macro/method_missing.rb

@@ -1,9 +1,12 @@
 module Mom
   class MethodMissing < Macro
     def to_risc(compiler)
-      builder = compiler.builder(compiler.source)
-      builder.prepare_int_return # makes integer_tmp variable as return
-      Macro.emit_syscall( builder , :exit )
+      builder = compiler.builder(compiler.source_name)
+      builder.build do
+        factory! << Parfait.object_space.get_factory_for(:Integer)
+        integer_tmp! << factory[:reserve]
+        Mom::Macro.emit_syscall( builder , :died ) #uses integer_tmp
+      end
       return compiler
     end
   end

lib/mom/mom_collection.rb

@@ -14,15 +14,18 @@ module Mom
       @method_compilers = compilers
     end
 
-    # lazily instantiate the compiler for init function
+    # lazily instantiate the compiler for __init__ function and __method_missing__
     def init_compiler
-      @init_compilers ||= MomCollection.create_init_compiler
+      @init_compilers ||= [
+        MomCollection.create_init_compiler ,
+        MomCollection.create_mm_compiler ,
+                  ]
     end
 
     # Return all compilers, namely the MethodCompilers passed in, plus the
     # boot_function's compilers (boot_compilers)
     def compilers
-      @method_compilers << init_compiler
+      @method_compilers + init_compiler
     end
 
     # Append another MomCompilers method_compilers to this one.
@@ -41,23 +44,25 @@ module Mom
       Risc::RiscCollection.new(riscs)
     end
 
-    # this is the really really first place the machine starts (apart from the jump here)
-     # it isn't really a function, ie it is jumped to (not called), exits and may not return
-     # so it is responsible for initial setup:
-     # - load fist message, set up Space as receiver
-     # - call main, ie set up message for that etc
-     # - exit (exit_sequence) which passes a machine int out to c
-     def self.create_init_compiler
-       compiler = compiler_for(:Object,:__init__ ,{})
-       compiler._reset_for_init # no return, just for init
-       compiler.add_code Init.new("missing")
-       return compiler
-     end
-     def self.compiler_for( clazz_name , method_name , arguments , locals = {})
-       frame = Parfait::NamedList.type_for( locals )
-       args = Parfait::NamedList.type_for( arguments )
-       MethodCompiler.compiler_for_class(clazz_name , method_name , args, frame )
-     end
+    # See Init instruction. We must have an init (ie we need it in code), so it is created in code
+    def self.create_init_compiler
+      compiler = compiler_for(:Object,:__init__ ,{})
+      compiler._reset_for_init # no return, just for init
+      compiler.add_code Init.new("missing")
+      return compiler
+    end
+
+    def self.create_mm_compiler
+      compiler = compiler_for(:Object,:__method_missing__ ,{})
+      compiler.add_code MethodMissing.new("missing")
+      return compiler
+    end
+
+    def self.compiler_for( clazz_name , method_name , arguments , locals = {})
+      frame = Parfait::NamedList.type_for( locals )
+      args = Parfait::NamedList.type_for( arguments )
+      MethodCompiler.compiler_for_class(clazz_name , method_name , args, frame )
+    end
 
   end
 end