stash old vm

moving on to getting mom to work and can’t have both
interpreter and elf broke, about 100 tests  went

stash/vm/method_compiler/basic_values.rb

@@ -0,0 +1,52 @@
+module Vm
+  # collection of the simple ones, int and strings and such
+
+  module BasicValues
+
+    # Constant expressions can by definition be evaluated at compile time.
+    # But that does not solve their storage, ie they need to be accessible at runtime from _somewhere_
+    # So expressions move the data into a Risc.
+    # All expressions return registers
+
+    # But in the future (in the one that holds great things) we optimize those unneccesay moves away
+
+    def on_IntegerExpression expression
+      int = expression.value
+      reg = use_reg :Integer , int
+      add_load_constant( expression, int , reg )
+      return reg
+    end
+
+    def on_TrueExpression expression
+      reg = use_reg :Boolean
+      add_load_constant( expression, true , reg )
+      return reg
+    end
+
+    def on_FalseExpression expression
+      reg = use_reg :Boolean
+      add_load_constant( expression, false , reg )
+      return reg
+    end
+
+    def on_NilExpression expression
+      reg = use_reg :NilClass
+      add_load_constant( expression, nil , reg )
+      return reg
+    end
+
+    def on_StringExpression expression
+      value = Parfait.new_word expression.value.to_sym
+      reg = use_reg :Word
+      Risc.machine.constants << value
+      add_load_constant( expression, value , reg )
+      return reg
+    end
+
+    def on_ClassExpression expression
+      name = expression.value
+      raise "No meta class #{name}" 
+    end
+
+  end
+end