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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include "error.h" |
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32 #include "oct-obj.h" |
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33 #include "pt-bp.h" |
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34 #include "pt-jump.h" |
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35 #include "pt-walk.h" |
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36 |
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37 class octave_value_list; |
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38 |
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39 // Break. |
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40 |
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41 // Nonzero means we're breaking out of a loop or function body. |
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42 int tree_break_expression::breaking = 0; |
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43 |
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44 octave_value |
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45 tree_break_expression::rvalue (void) |
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46 { |
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47 // Even if we have an error we should still enter debug mode. |
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48 MAYBE_DO_BREAKPOINT; |
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49 |
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50 if (! error_state) |
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51 breaking = 1; |
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52 |
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53 return true; |
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54 } |
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55 |
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56 void |
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57 tree_break_expression::accept (tree_walker& tw) |
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58 { |
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59 tw.visit_break_expression (*this); |
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60 } |
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61 |
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62 // Continue. |
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63 |
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64 // Nonzero means we're jumping to the end of a loop. |
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65 int tree_continue_expression::continuing = 0; |
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66 |
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67 octave_value |
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68 tree_continue_expression::rvalue (void) |
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69 { |
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70 MAYBE_DO_BREAKPOINT; |
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71 |
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72 if (! error_state) |
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73 continuing = 1; |
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74 |
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75 return true; |
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76 } |
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77 |
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78 void |
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79 tree_continue_expression::accept (tree_walker& tw) |
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80 { |
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81 tw.visit_continue_expression (*this); |
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82 } |
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83 |
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84 // Return. |
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85 |
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86 // Nonzero means we're returning from a function. Global because it |
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87 // is also needed in tree-expr.cc. |
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88 int tree_return_expression::returning = 0; |
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89 |
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90 octave_value |
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91 tree_return_expression::rvalue (void) |
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92 { |
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93 MAYBE_DO_BREAKPOINT; |
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94 |
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95 if (! error_state) |
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96 returning = 1; |
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97 |
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98 return true; |
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99 } |
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100 |
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101 void |
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102 tree_return_expression::accept (tree_walker& tw) |
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103 { |
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104 tw.visit_return_expression (*this); |
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105 } |
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106 |
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107 /* |
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108 ;;; Local Variables: *** |
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109 ;;; mode: C++ *** |
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110 ;;; End: *** |
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111 */ |
