Initial support for (classdef) packages. * libinterp/interpfcn/load-path.h (class load_path::loader): New class. (load_path::default_loader, load_path::loader_map): New members. (load_path::load_path): Initialize them. (load_path::fcn_map, load_path::private_fcn_map, load_path::method_map): Move to class load_path::loader. (load_path::add_to_fcn_map, load_path::add_to_private_fcn_map, load_path::add_to_method_map, load_path::move_fcn_map, load_path::move_method_map, load_path::remove_fcn_map, load_path::remove_private_fcn_map, load_path::remove_method_map): Move to class load_path::loader. (load_path::move): Change signature. (load_path::do_move, load_path::remove, load_path::add, load_path::get_loader): New methods. (load_path::find_package, load_path::do_find_package): Likewise. (load_path::dir_info::package_dir_map): New member. (load_path::dir_info::dir_info, load_path::dir_info::operator=): Initialize/assign it. (load_path::dir_info::get_package_dir): New method. (load_path::do_find_fcn, load_path::do_find_private_fcn): Remove methods. (load_path::find_fcn, load_path::find_private_fcn, load_path::find_fcn_file, load_path::find_oct_file, load_path::find_mex_file): Rewrite using class load_path::loader. New argument for package name. *libinterp/interpfcn/load-path.cc (load_path::dir_info::initialize): Clear package_map_dir. (load_path::dir_info::get_package_dir): New method. (load_path::dir_info::get_files_list): Use it. (load_path::add_to_fcn_map, load_path::add_to_private_fcn_map, load_path::add_to_method_map, load_path::move_fcn_map, load_path::move_method_map, load_path::remove_fcn_map, load_path::remove_private_fcn_map, load_path::remove_method_map): Move to class load_path::loader. (load_path::move): Move implementation to do_move, rewrite using class load_path::loader. Signature change. (load_path::do_move, load_path::add, load_path::remove): New methods. (load_path::do_clear): Rewrite using class load_path::loader. (load_path::do_add): Use "do_move" and "add" methods. (load_path::do_remove): Rewrite using "remove" method. (load_path::do_update): Rewitre using class load_path::loader and "add" method. (load_path::do_find_method, load_path::do_methods, load_path::do_overloads, load_path::do_fcn_names, load_path::do_display): Move Implementation to class load_path::loader, without "do_" prefix. Rewrite original to redirect to appropriate loaders. (F__dump_load_path__): New debug function. * libinterp/interpfcn/symtab.h (symbol_table::package_name): New member. (symbol_table::symbol_table): Initialize it. (symbol_table::find): New scope argument. (symbol_table::alloc_package_scope): New method. (symbol_table::fcn_info::find, symbol_table::fcn_info::find_function, symbol_table::fcn_info::find_user_function, symbol_table::fcn_info::fcn_info_rep::xfind, symbol_table::fcn_info::fcn_info_rep::load_class_constructor, symbol_table::fcn_info::fcn_info_rep::find, symbol_table::fcn_info::fcn_info_rep::find_user_function): New argument for package name. (symbol_table::fcn_info::fcn_info_rep::package): New member. (symbol_table::fcn_info::fcn_info_rep::find_package, symbol_table::fcn_info::fcn_info_rep::clear_package): New methods. (symbol_table::fcn_info::fcn_info_rep::clear): Clear package. * libinterp/interpfcn/symtab.cc (symbol_table::fcn_info::fcn_info_rep::load_class_constructor, symbol_table::fcn_info::fcn_info_rep::find, symbol_table::fcn_info::fcn_info_rep::xfind, symbol_table::fcn_info::fcn_info_rep::find_user_function): New argument for package name. (symbol_table::fcn_info::fcn_info_rep::find_package): New method. (symbol_table::find): New scope argument. (symbol_table::do_find): Use package_name member. * libinterp/octave-value/ov-classdef.h (cdef_package::cdef_package_rep::scope): New member. (cdef_package::cdef_package_rep::~cdef_package_rep): New destructor. (cdef_package::cdef_package_rep::meta_subsref, cdef_package::cdef_package_rep::meta_release, cdef_package::cdef_package_rep::meta_is_postfix_index_handled, cdef_package::cdef_package_rep::find, cdef_package::cdef_package_rep::wrap): New methods. (cdef_package::find): New method. (cdef_manager::find_package, cdef_manager::do_find_package): New argument "load_if_not_found". (cdef_manager::find_package_symbol, cdef_manager::do_find_package_symbol): New methods. * libinterp/octave-value/ov-classdef.cc (cdef_manager::do_find_package_symbol): New method. (cdef_manager::do_find_package): New argument. Create package object if it is not loaded yet and the package exists in load_path. (cdef_manager::do_find_class): Handle class names with package. (cdef_package::cdef_package_rep::meta_subsref, cdef_package::cdef_package_rep::meta_release, cdef_package::cdef_package_rep::find): New methods. (cdef_class::make_meta_class): Handle package-scoped classes. (make_package): Assign correct name to the package object. * libinterp/parse-tree/pt-classdef.h (tree_classdef::pack_name): New member. (tree_classdef::tree_classdef): New argument. Initialize it. (tree_classdef::package_name): New accessor. * libinterp/parse-tree/parse.h (octave_base_parser::curr_package_name): New member. (octave_base_parser::octave_base_parser): Initialize it. (load_fcn_from_file): New argument for package name. * libinterp/parse-tree/oct-parse.in.yy (load_fcn_from_file): New argument for package name. Change callers. (parse_fcn_from_file): New argument for package name. Change callers. (octave_base_parser::make_classdef): Use curr_package_name to create the tree_classdef object. * libinterp/octave-value/ov-fcn-handle.cc (octave_fcn_handle::set_fcn): Adapt to new load_fcn_from_file signature. * libinterp/interp-core/ls-mat5.cc (read_mat5_binary_element): Adapt to new load_fcn_from_file signature.

--- a/libinterp/parse-tree/parse.h	Sun May 12 21:47:57 2013 -0400
+++ b/libinterp/parse-tree/parse.h	Fri May 17 23:17:25 2013 -0400
@@ -104,6 +104,7 @@
 load_fcn_from_file (const std::string& file_name,
                     const std::string& dir_name = std::string (),
                     const std::string& dispatch_type = std::string (),
+                    const std::string& package_name = std::string (),
                     const std::string& fcn_name = std::string (),
                     bool autoload = false);
 
@@ -148,9 +149,9 @@
       autoloading (false), fcn_file_from_relative_lookup (false),
       parsing_subfunctions (false), max_fcn_depth (0),
       curr_fcn_depth (0), primary_fcn_scope (-1),
-      curr_class_name (), function_scopes (), primary_fcn_ptr (0),
-      subfunction_names (), classdef_object (0), stmt_list (0),
-      lexer (lxr)
+      curr_class_name (), curr_package_name (), function_scopes (),
+      primary_fcn_ptr (0), subfunction_names (), classdef_object (0),
+      stmt_list (0), lexer (lxr)
   {
     init ();
   }
@@ -424,6 +425,10 @@
   // constructors.
   std::string curr_class_name;
 
+  // Name of the current package when we are parsing an element contained
+  // in a package directory (+-directory).
+  std::string curr_package_name;
+
   // A stack holding the nested function scopes being parsed.
   // We don't use std::stack, because we want the clear method. Also, we
   // must access one from the top