lib/minjs/ecma262/base.rb in minjs-0.1.2 vs lib/minjs/ecma262/base.rb in minjs-0.1.3

@@ -41,10 +41,14 @@
           j.push(js)
           prev = js
         end
         j.join("")
       end
+
+      def replace(from, to)
+        puts "warning: #{self.class}: replace not implement"
+      end
     end
 
     class Prog < Base
       attr_reader :source_elements
       attr_reader :context
@@ -106,9 +110,15 @@
         end
       end
 
       def remove(st)
         @source_elements.delete(st)
+      end
+
+      def remove_empty_statement
+        @source_elements.reject!{|x|
+          x.class == StEmpty
+        }
       end
 
       def each(&block)
         @source_elements.each(&block)
       end