Allow to parse external methods declaration in classdef files. * libinterp/parse-tree/parser.h (octave_base_parser::start_classdef_external_method, octave_base_parser::finish_classdef_external_method): New methods. * libinterp/parse-tree/oct-parse.in.yy (octave_base_parser::start_classdef_external_method, octave_base_parser::finish_classdef_external_method): Likewise. (%destructor): Add missing directives for classdef-related types. (method, method_decl, method_decl1): New nonterminal rules. (methods_list): Use "method" on terminal. * libinterp/octave-value/ov-classdef.cc (cdef_package::cdef_package_rep::meta_subsref): When searching for package methods, only issue an error when error_state is not set.

--- a/libinterp/octave-value/ov-classdef.cc	Sat Jan 11 22:50:11 2014 -0800
+++ b/libinterp/octave-value/ov-classdef.cc	Sun Jan 12 15:54:43 2014 -0500
@@ -3176,7 +3176,7 @@
                   else
                     retval(0) = o;
                 }
-              else
+              else if (! error_state)
                 error ("member `%s' in package `%s' does not exist",
                        nm.c_str (), get_name ().c_str ());
             }