Mercurial > hg > octave-nkf
view src/pt-decl.cc @ 5967:d542d9197839 ss-2-9-8
[project @ 2006-08-24 21:24:53 by jwe]
author | jwe |
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date | Thu, 24 Aug 2006 21:27:41 +0000 |
parents | 2a6cb4ed8f1e |
children | 516d3071b34c |
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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #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; } tree_decl_elt * tree_decl_elt::dup (symbol_table *sym_tab) { return new tree_decl_elt (id ? id->dup (sym_tab) : 0, expr ? expr->dup (sym_tab) : 0); } 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; } } tree_decl_init_list * tree_decl_init_list::dup (symbol_table *sym_tab) { tree_decl_init_list *new_dil = new tree_decl_init_list (); for (iterator p = begin (); p != end (); p++) { tree_decl_elt *elt = *p; new_dil->append (elt ? elt->dup (sym_tab) : 0); } return new_dil; } 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 ()); } tree_command * tree_global_command::dup (symbol_table *sym_tab) { return new tree_global_command (init_list ? init_list->dup (sym_tab) : 0, 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 ()); } } tree_command * tree_static_command::dup (symbol_table *sym_tab) { return new tree_static_command (init_list ? init_list->dup (sym_tab) : 0, line (), column ()); } /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */