Mercurial > hg > octave-nkf
view src/pt-decl.cc @ 4960:ce01dbd7e026 ss-2-1-58
[project @ 2004-09-02 03:47:49 by jwe]
author | jwe |
---|---|
date | Thu, 02 Sep 2004 03:47:49 +0000 |
parents | 7a3eb3cc292b |
children | e35b034d3523 |
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/* Copyright (C) 1996, 1997 John W. Eaton 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 2, 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, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) #pragma implementation #endif #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "defun.h" #include "error.h" #include "pt-cmd.h" #include "ov.h" #include "oct-lvalue.h" #include "pt-decl.h" #include "pt-exp.h" #include "pt-id.h" #include "pt-walk.h" #include "utils.h" #include "variables.h" // Declarations (global, static, etc.). tree_decl_elt::~tree_decl_elt (void) { delete id; delete expr; } void tree_decl_elt::accept (tree_walker& tw) { tw.visit_decl_elt (*this); } // Initializer lists for declaration statements. void tree_decl_init_list::eval (tree_decl_elt::eval_fcn f) { for (iterator p = begin (); p != end (); p++) { tree_decl_elt *elt = *p; f (*elt); if (error_state) break; } } void tree_decl_init_list::accept (tree_walker& tw) { tw.visit_decl_init_list (*this); } // Base class for declaration commands (global, static). tree_decl_command::~tree_decl_command (void) { delete init_list; } void tree_decl_command::accept (tree_walker& tw) { tw.visit_decl_command (*this); } // Global. void tree_global_command::do_init (tree_decl_elt& elt) { tree_identifier *id = elt.ident (); if (id) { id->link_to_global (); if (! error_state) { octave_lvalue ult = id->lvalue (); if (ult.is_undefined ()) { tree_expression *expr = elt.expression (); octave_value init_val; if (expr) init_val = expr->rvalue (); else init_val = Matrix (); ult.assign (octave_value::op_asn_eq, init_val); } } } } void tree_global_command::eval (void) { if (init_list) { init_list->eval (do_init); initialized = true; } if (error_state) ::error ("evaluating global command near line %d, column %d", line (), column ()); } // Static. void tree_static_command::do_init (tree_decl_elt& elt) { tree_identifier *id = elt.ident (); if (id) { id->mark_as_static (); octave_lvalue ult = id->lvalue (); if (ult.is_undefined ()) { tree_expression *expr = elt.expression (); octave_value init_val; if (expr) init_val = expr->rvalue (); else init_val = Matrix (); ult.assign (octave_value::op_asn_eq, init_val); } } } void tree_static_command::eval (void) { // Static variables only need to be marked and initialized once. if (init_list && ! initialized) { init_list->eval (do_init); initialized = true; if (error_state) ::error ("evaluating static command near line %d, column %d", line (), column ()); } } /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */