working on if

lib/ast/basic_expressions.rb

@@ -67,7 +67,7 @@ module Ast
 
     def compile frame , method
       raise "must assign to NameExpression , not #{left}" unless left.instance_of? NameExpression 
-      r = right.compile(frame,method)
+      r = right.compile(frame , method)
       frame.compile_set( method , left.name , r )
     end
   end

lib/ast/function_expression.rb

@@ -2,9 +2,12 @@ module Ast
   class FunctionExpression < Expression
 #    attr_reader  :name, :params, :body , :receiver
     def compile frame , method
-      args = params.collect{ |p| p.compile(frame , method )}
+      args = params.collect do |p|
+        raise "error, arguemnt must be a identifier, not #{p}" unless p.is_a? NameExpression
+        Virtual::Argument.new( p.name , Virtual::Mystery.new )
+      end
       r = receiver ? receiver.compile(frame,method) : Virtual::SelfReference.new
-      method = Virtual::Method.new(name , params , r )
+      method = Virtual::Method.new(name , args , r )
       frame = frame.new_frame
       return_type = nil
       body.each do |ex|

lib/ast/if_expression.rb

@@ -2,7 +2,14 @@ module Ast
   class IfExpression < Expression
 #    attr_reader  :cond, :if_true, :if_false
     def compile frame , method
-      Virtual::Reference
+      is = cond.compile(frame , method)
+#      is.is_false(frame,method)
+      last = is
+      if_true.each do |part|
+        last = part.compile(frame,method )
+        raise part.inspect if last.nil?
+      end
+      last
     end
     def old
       f = context.function