Implement some embryonic handle-classdef semantic. * libinterp/octave-value/ov-classdef.h (cdef_object_rep::subsasgn, handle_cdef_object::subsasgn, octave_classdef::subsasgn): New method declarations. (handle_cdef_object::~handle_cdef_object): New destructor declaration. (cdef_class::cdef_class_rep::handle_class): New boolean field. (cdef_class::cdef_class_rep::cdef_class_rep): Initialize it. (cdef_class::cdef_class_rep::mark_as_handle_class, cdef_class::cdef_class_rep::is_handle_class, cdef_class::mark_as_handle_class, cdef_class::is_handle_class): Manipulate it. (cdef_class::cdef_class_rep::get_name): New method. (cdef_class::get_name): Use it. (cdef_class::cdef_class_rep::initialize_object, cdef_class::cdef_class_rep::subsref_meta, cdef_class::cdef_class_rep::run_constructor, cdef_class::cdef_class_rep::construct, cdef_class:initialize_object, cdef_class::subsref_meta, cdef_class::run_constructor, cdef_class::construct): New methods. (cdef_class::cdef_class_rep::find_method, cdef_class::find_method): Add "local" argument. (cdef_class::cdef_class_rep::find_names, cdef_class::find_names): Change signature to use std::set and a boolean flag. (cdef_class::cdef_class_rep::find_methods, cdef_class::find_methods): Change signature to use a boolean flag as second argument. (cdef_class::make_meta_class): New static method. (cdef_class::get_method_function, cdef_class::get_constructor_function): New methods. (cdef_property::cdef_property_rep::set_value, cdef_property::set_value): Make cdef_object argument non const. (cdef_property::cder_property_rep::is_relative_set): New method. (cdef_property::get_get_access, cdef_property::get_set_access): Delete methods. (cdef_property::check_get_access, cdef_property::check_set_access): Remove string argument. (cdef_method::get_access): Delete method. (cdef_method::check_access): Remove string argument. * libinterp/octave-value/ov-classdef.cc (gripe_method_access, gripe_property_access): Support access specified as cell array of classes. (make_function_of_class): New static function(s). (check_access (std::string, std::string), superclass_access): Remove static functions. (lookup_class): Use symbol_table when class hasn't been loaded yet. (lookup_classes): Returns std::list<cdef_class> instead of Cell. (class_get_superclasses, class_get_inferiorclasses): Use it. (to_ov (const std::list<cdef_class>&)): New static function. (get_class_context, check_access (const cdef_class&, const octave_value&)): Likewise. (handle_cdef_object::subsref): Use new signature of access check methods. (property_get_defaultvalue): New built-in property accessor. (make_class): Change signature to support multiple inheritance. Set "Sealed" to false by default. Determine value for HandleCompatible property and handle-class representation. (make_property): Take cdef_class as first argument. Add DefaultValue and HasDefault properties. Call make_function_of_class for property accessors. (make_attribute): Take cdef_class as first argument. (make_method): Likewise. Call make_function_of_class. (make_method (octave_builtin::fcn)): Do no construct a function handle object. (octave_classdef::subsasgn, handle_cdef_object::subsasgn): New method. (class octave_classdef_proxy): New class. (cdef_class::get_method_function): Use it, new method. (handle_cdef_object::~handle_cdef_object): New destructor. (cdef_class_rep::find_method): New boolean "local" argument. When true, only look into the current class, not in superclasses. (cdef_class_rep::find_methods): New signature. (cdef_class_rep::get_methods): Use it. (cdef_class_rep::find_properties): New signature. (cdef_class_rep::get_properties): Use it. (cdef_class_rep::find_names): New signature. (cdef_class_rep::get_names): Use it. (cdef_class_rep::subsref_meta, cdef_class_rep::initialize_object, cdef_class_rep::run_constructor, cdef_class_rep::construct): New methods. (compute_attribute_value, attribute_to_string): New static functions. (cdef_class::make_meta_class): Change signature, non const argument. Implement it. (cdef_property_rep::get_value): Do not check access here. (cdef_property_rep::set_value, cdef_property_rep::is_recursive_set): New method. (cdef_property_rep::check_get_access, cdef_property_rep::check_set_access, cdef_method_rep::check_access): Use static check_access utility function. (install_classdef): Adapt to change of signature of make_class. Mark meta classes as sealed. Add HandleCompatible property to meta.class. Add DefaultValue and HasDefault properties to meta.property. * libinterp/parse-tree/pt-classdef.h (tree_classdef::make_meta_class): Change return type to (octave_function *). * libinterp/parse-tree/pt-classdef.cc (tree_classdef::make_meta_class): Likewise. Call cdef_class::get_constructor_function. * libinterp/parse-tree/oct-parse.yy (parse_fcn_file): Adapt to new signature of tree_classdef::make_meta_class. * libinterp/octave-value/ov-fcn.h (octave_function::is_classdef_constructor): New virtual method. * libinterp/octave-value/ov-usr-fcn.h (octave_user_function::class_ctor_type): New private enum. (octave_user_function::mark_as_class_constructor, octave_user_function::is_class_constructor): Use it. (octave_user_function::mark_as_classdef_constructor, octave_user_function::is_classdef_constructor): New methods. (octave_user_function::class_constructor): Turn into class_ctor_type. * libinterp/octave-value/of-usr-fcn.cc (octave_user_function::octave_user_function): Initialize class_constructor. (octave_user_function::do_multi_index_op): When function is a classdef constructor, extract the first argument and use it to populate the first output argument.

/*

Copyright (C) 2001-2012 Ben Sapp

This file is part of Octave.

Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#if !defined (octave_tree_bp_h)
#define octave_tree_bp_h 1

#include "input.h"
#include "ov-usr-fcn.h"
#include "pt-walk.h"
#include "pt-pr-code.h"
#include "toplev.h"

class tree;
class tree_decl_command;

class
tree_breakpoint : public tree_walker
{
 public:

  enum action { set = 1, clear = 2, list = 3 };

  tree_breakpoint (int l, action a)
    : line (l), act (a), found (false), bp_list () { }

  ~tree_breakpoint (void) { }

  bool success (void) const { return found; }

  void visit_argument_list (tree_argument_list&);

  void visit_binary_expression (tree_binary_expression&);

  void visit_break_command (tree_break_command&);

  void visit_colon_expression (tree_colon_expression&);

  void visit_continue_command (tree_continue_command&);

  void visit_global_command (tree_global_command&);

  void visit_persistent_command (tree_persistent_command&);

  void visit_decl_elt (tree_decl_elt&);

  void visit_decl_init_list (tree_decl_init_list&);

  void visit_while_command (tree_while_command&);

  void visit_do_until_command (tree_do_until_command&);

  void visit_simple_for_command (tree_simple_for_command&);

  void visit_complex_for_command (tree_complex_for_command&);

  void visit_octave_user_script (octave_user_script&);

  void visit_octave_user_function (octave_user_function&);

  void visit_octave_user_function_header (octave_user_function&);

  void visit_octave_user_function_trailer (octave_user_function&);

  void visit_function_def (tree_function_def&);

  void visit_identifier (tree_identifier&);

  void visit_if_clause (tree_if_clause&);

  void visit_if_command (tree_if_command&);

  void visit_if_command_list (tree_if_command_list&);

  void visit_index_expression (tree_index_expression&);

  void visit_matrix (tree_matrix&);

  void visit_cell (tree_cell&);

  void visit_multi_assignment (tree_multi_assignment&);

  void visit_no_op_command (tree_no_op_command&);

  void visit_anon_fcn_handle (tree_anon_fcn_handle&);

  void visit_constant (tree_constant&);

  void visit_fcn_handle (tree_fcn_handle&);

  void visit_funcall (tree_funcall&);

  void visit_parameter_list (tree_parameter_list&);

  void visit_postfix_expression (tree_postfix_expression&);

  void visit_prefix_expression (tree_prefix_expression&);

  void visit_return_command (tree_return_command&);

  void visit_return_list (tree_return_list&);

  void visit_simple_assignment (tree_simple_assignment&);

  void visit_statement (tree_statement&);

  void visit_statement_list (tree_statement_list&);

  void visit_switch_case (tree_switch_case&);

  void visit_switch_case_list (tree_switch_case_list&);

  void visit_switch_command (tree_switch_command&);

  void visit_try_catch_command (tree_try_catch_command&);

  void visit_unwind_protect_command (tree_unwind_protect_command&);

  octave_value_list get_list (void) { return bp_list; }

  int get_line (void) { return line; }

 private:

  void do_decl_command (tree_decl_command&);

  void take_action (tree& tr);

  void take_action (tree_statement& stmt);

  // Statement line number we are looking for.
  int line;

  // What to do.
  action act;

  // Have we already found the line?
  bool found;

  // List of breakpoint line numbers.
  octave_value_list bp_list;

  // No copying!

  tree_breakpoint (const tree_breakpoint&);

  tree_breakpoint& operator = (const tree_breakpoint&);
};

// TRUE means SIGINT should put us in the debugger at the next
// available breakpoint.
extern bool octave_debug_on_interrupt_state;

#endif