X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2FDEVEL%2Fmathml_editor%2Fsrc%2FAPushLexer.hh;h=342d18fe919dd4241408f68fc79f00bbbfc8059e;hb=387aeebf96181c051b7f527a0901b173cfcdf194;hp=4fca8cf7651ba467d70766fa913b8d8147b4aa82;hpb=2f94240bc382ca43017f31b0852f1717fe18090b;p=helm.git

diff --git a/helm/DEVEL/mathml_editor/src/APushLexer.hh b/helm/DEVEL/mathml_editor/src/APushLexer.hh
index 4fca8cf76..342d18fe9 100644
--- a/helm/DEVEL/mathml_editor/src/APushLexer.hh
+++ b/helm/DEVEL/mathml_editor/src/APushLexer.hh
@@ -9,6 +9,7 @@ public:
   virtual ~APushLexer() { };
 
   virtual void push(char) = 0;
+  virtual void drop(bool = false) = 0;
   virtual void reset(void) = 0;
   virtual bool error(void) const = 0;