Mercurial > octave-nkf
view libinterp/octave-value/ov-oncleanup.cc @ 15986:14aa0b5a980c classdef
Abstract the meta-protocol layer to use it for other meta objects.
* libinterp/octave-value/ov-classdef.h (class cdef_meta_object_rep,
class cdef_meta_object): New classes.
(cdef_object_rep::is_class, cdef_object_rep::is_method,
cdef_object_rep::is_property, cdef_object_rep::is_package): Moved to
cdef_meta_object_rep.
(cdef_object::is_class, cdef_object::is_method, cdef_object::is_property,
cdef_object::is_package): Moved to cdef_meta_object.
(cdef_object_rep::is_handle_object, cdef_object_rep::is_value_object,
cdef_object_rep::is_meta_object): New virtual methods.
(cdef_object::is_handle_object, cdef_object::is_value_object,
cdef_object::is_meta_object): New methods.
(handle_cdef_object::is_handle_object): New method.
(value_cdef_object::is_value_object): Likewise.
(class cdef_class, class cdef_property, class_cdef_method,
class cdef_package): Inherit from cdef_meta_object.
(class cdef_class::cdef_class_rep, class cdef_property::cdef_property_rep,
class cdef_method::cdef_method_rep, class cdef_package::cdef_package_rep):
Inherit from cdef_meta_object_rep.
(cdef_class::cdef_class_rep::meta_subsref): Renamed from subsref_meta.
(cdef_class::cdef_class_rep::meta_release,
cdef_class::cdef_class_rep::meta_is_postfix_index_handled): New method, moved
from octave_classdef_proxy.
(cdef_class::operator=(const cdef_object&)): Remove method.
(cdef_class::subsref_meta): Remove method, replaced by
cdef_meta_object::meta_subsref.
(cdef_method::cdef_method(const cdef_method&)): Fix signature of copy
constructor, was using "const cdef_property&".
(cdef_package::cdef_package(const cdef_package&)): Add copy constructor.
* libinterp/octave-value/ov-classdef.cc (class octave_classdef_meta): Renamed
from octave_classdef_proxy.
(octave_classdef_meta::meta_subsref): Method renamed from subsref_meta.
(octave_classdef_meta::meta_subsref, octave_classdef_meta::octave_classdef_meta,
octave_classdef_meta::is_postfix_index_handled): Forward calls to
cdef_meta_object.
(cdef_class::cdef_class_rep::meta_subsref): Renamed from subsref_meta.
(cdef_class::cdef_class_rep::meta_release): New method.
(cdef_class::get_method_function): Use renamed class octave_classdef_meta.
(cdef_class::cdef_class_rep::cdef_class_rep): Inherit from cdef_meta_object_rep.
author | Michael Goffioul <michael.goffioul@gmail.com> |
---|---|
date | Mon, 28 Jan 2013 21:56:01 -0500 |
parents | 18f8f2987205 |
children | d63878346099 |
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/* Copyright (C) 2010-2012 VZLU Prague 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/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "defun.h" #include "ov-oncleanup.h" #include "ov-fcn.h" #include "ov-usr-fcn.h" #include "pt-misc.h" #include "toplev.h" DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_oncleanup, "onCleanup", "onCleanup"); octave_oncleanup::octave_oncleanup (const octave_value& f) : fcn (f) { if (f.is_function_handle ()) { octave_function *fptr = f.function_value (true); if (fptr) { octave_user_function *uptr = dynamic_cast<octave_user_function *> (fptr); if (uptr != 0) { tree_parameter_list *pl = uptr->parameter_list (); if (pl != 0 && pl->length () > 0) warning ("onCleanup: cleanup action takes parameters"); } } else error ("onCleanup: no default dispatch for function handle"); } else { fcn = octave_value (); error ("onCleanup: argument must be a function handle"); } } octave_oncleanup::~octave_oncleanup (void) { if (fcn.is_undefined ()) return; unwind_protect frame; // Clear interrupts. frame.protect_var (octave_interrupt_state); octave_interrupt_state = 0; // Disallow quit(). frame.protect_var (quit_allowed); quit_allowed = false; // Clear errors. frame.protect_var (error_state); error_state = 0; try { // Run the actual code. fcn.do_multi_index_op (0, octave_value_list ()); } catch (octave_interrupt_exception) { // Swallow the interrupt. warning ("onCleanup: interrupt occured in cleanup action"); } catch (...) // Yes, the black hole. We're in a d-tor. { // This shouldn't happen, in theory. error ("onCleanup: internal error: unhandled exception in cleanup action"); } // We don't want to ignore errors that occur in the cleanup code, so // if an error is encountered there, leave error_state alone. // Otherwise, set it back to what it was before. if (error_state) { frame.discard_first (); octave_call_stack::backtrace_error_message (); } } octave_scalar_map octave_oncleanup::scalar_map_value (void) const { octave_scalar_map retval; retval.setfield ("task", fcn); return retval; } static void warn_save_load (void) { warning ("onCleanup: load and save not supported"); } bool octave_oncleanup::save_ascii (std::ostream& /* os */) { warn_save_load (); return true; } bool octave_oncleanup::load_ascii (std::istream& /* is */) { warn_save_load (); return true; } bool octave_oncleanup::save_binary (std::ostream& /* os */, bool& /* save_as_floats */) { warn_save_load (); return true; } bool octave_oncleanup::load_binary (std::istream& /* is */, bool /* swap */, oct_mach_info::float_format /* fmt */) { warn_save_load (); return true; } #if defined (HAVE_HDF5) bool octave_oncleanup::save_hdf5 (hid_t /* loc_id */, const char * /* name */, bool /* save_as_floats */) { warn_save_load (); return true; } bool octave_oncleanup::load_hdf5 (hid_t /* loc_id */, const char * /* name */) { warn_save_load (); return true; } #endif void octave_oncleanup::print (std::ostream& os, bool pr_as_read_syntax) const { print_raw (os, pr_as_read_syntax); newline (os); } void octave_oncleanup::print_raw (std::ostream& os, bool pr_as_read_syntax) const { os << "onCleanup ("; if (fcn.is_defined ()) fcn.print_raw (os, pr_as_read_syntax); os << ")"; } DEFUN (onCleanup, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {@var{c} =} onCleanup (@var{action})\n\ Create a special object that executes a given function upon destruction.\n\ If the object is copied to multiple variables (or cell or struct array\n\ elements) or returned from a function, @var{action} will be executed after\n\ clearing the last copy of the object. Note that if multiple local onCleanup\n\ variables are created, the order in which they are called is unspecified.\n\ For similar functionality @xref{The unwind_protect Statement}.\n\ @end deftypefn") { octave_value retval; if (args.length () == 1) retval = octave_value (new octave_oncleanup (args(0))); else print_usage (); return retval; } /* %!test %! old_wstate = warning ("query"); %! unwind_protect %! trigger = onCleanup (@() warning ("on", "__MY_WARNING__")); %! warning ("off", "__MY_WARNING__"); %! assert ((warning ("query", "__MY_WARNING__")).state, "off"); %! clear trigger; %! assert ((warning ("query", "__MY_WARNING__")).state, "on"); %! unwind_protect_cleanup %! warning (old_wstate); %! end_unwind_protect */