move ast code/patch here

lib/bosl/ast_helper.rb

@@ -0,0 +1,23 @@
+AST::Node.class_eval do
+
+  def [](name)
+    #puts self.inspect
+    children.each do |child|
+      if child.is_a?(AST::Node)
+        #puts child.type
+        if (child.type == name)
+          return child.children
+        end
+      else
+        #puts child.class
+      end
+    end
+    nil
+  end
+
+  def first_from( node_name )
+    from = self[node_name]
+    return nil unless from
+    from.first
+  end
+end

lib/bosl/compiler.rb

@@ -33,11 +33,12 @@ module Bosl
   end
 end
 
-require_relative "compiler/basic_expressions"
+require_relative "ast_helper"
 require_relative "compiler/callsite_expression"
 require_relative "compiler/compound_expressions"
 require_relative "compiler/expression_list"
 require_relative "compiler/field_def"
+require_relative "compiler/field_access"
 require_relative "compiler/function_expression"
 require_relative "compiler/if_expression"
 require_relative "compiler/module_expression"