fix all tests

lib/ast/basic_expressions.rb

@@ -74,7 +74,7 @@ module Ast
 
   class VariableExpression < NameExpression
     def compile frame ,method
-      Virtual::ObjectGet.new(name)
+      method.add Virtual::ObjectGet.new(name)
     end
   end
 end

lib/ast/function_expression.rb

@@ -8,8 +8,8 @@ module Ast
       frame = frame.new_frame
       return_type = nil
       body.each do |ex|
-        val = ex.compile(frame , method )
-        return_type = val.type
+        return_type = ex.compile(frame , method )
+        raise return_type.inspect if return_type.is_a? Virtual::Instruction
       end
       method.return_type = return_type
       method

lib/ast/operator_expressions.rb

@@ -2,7 +2,11 @@ module Ast
   class OperatorExpression < Expression
 #    attr_reader  :operator, :left, :right
     def compile frame , method
-      Virtual::Reference.new
+      tmp = method.get_tmp
+      ass = AssignmentExpression.new( tmp , left )
+      l = ass.compile(frame , method)
+      call = CallSiteExpression.new( operator , [right] , l)
+      call.compile(frame , method)
     end
     def scratch
       into = context.function