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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2002, 2003, 2004, 2005, 2006, 2007 |
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4 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_colon_h) |
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25 #define octave_tree_colon 1 |
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26 |
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27 #include <string> |
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28 |
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29 class tree_walker; |
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30 |
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31 class octave_value; |
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32 class octave_value_list; |
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33 class octave_lvalue; |
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34 |
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35 #include "pt-exp.h" |
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36 #include "symtab.h" |
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37 |
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38 // Colon expressions. |
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39 |
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40 class |
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41 tree_colon_expression : public tree_expression |
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42 { |
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43 public: |
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44 |
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45 tree_colon_expression (int l = -1, int c = -1) |
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46 : tree_expression (l, c), op_base (0), op_limit (0), |
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47 op_increment (0), save_base (false) { } |
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48 |
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49 tree_colon_expression (tree_expression *e, int l = -1, int c = -1) |
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50 : tree_expression (l, c), op_base (e), op_limit (0), |
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51 op_increment (0), save_base (false) { } |
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52 |
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53 tree_colon_expression (tree_expression *bas, tree_expression *lim, |
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54 tree_expression *inc, int l = -1, int c = -1) |
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55 : tree_expression (l, c), op_base (bas), op_limit (lim), |
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56 op_increment (inc), save_base (false) { } |
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57 |
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58 ~tree_colon_expression (void) |
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59 { |
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60 if (! save_base) |
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61 delete op_base; |
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62 |
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63 delete op_limit; |
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64 delete op_increment; |
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65 } |
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66 |
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67 bool has_magic_end (void) const |
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68 { |
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69 return ((op_base && op_base->has_magic_end ()) |
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70 || (op_limit && op_limit->has_magic_end ()) |
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71 || (op_increment && op_increment->has_magic_end ())); |
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72 } |
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73 |
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74 void preserve_base (void) { save_base = true; } |
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75 |
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76 tree_colon_expression *append (tree_expression *t); |
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77 |
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78 bool rvalue_ok (void) const { return true; } |
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79 |
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80 octave_value rvalue (void); |
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81 |
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82 octave_value_list rvalue (int nargout); |
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83 |
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84 void eval_error (const std::string& s = std::string ()) const; |
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85 |
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86 tree_expression *base (void) { return op_base; } |
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87 |
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88 tree_expression *limit (void) { return op_limit; } |
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89 |
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90 tree_expression *increment (void) { return op_increment; } |
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91 |
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92 int line (void) const; |
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93 int column (void) const; |
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94 |
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95 tree_expression *dup (symbol_table::scope_id scope); |
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96 |
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97 void accept (tree_walker& tw); |
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98 |
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99 private: |
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100 |
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101 // The components of the expression. |
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102 tree_expression *op_base; |
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103 tree_expression *op_limit; |
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104 tree_expression *op_increment; |
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105 |
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106 bool save_base; |
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107 |
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108 octave_value |
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109 make_range (const Matrix& m_base, const Matrix& m_limit, |
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110 const Matrix& m_increment, bool result_is_str, |
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111 bool dq_str) const; |
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112 |
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113 octave_value |
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114 make_range (const octave_value& ov_base, const octave_value& ov_limit, |
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115 const octave_value& ov_increment) const; |
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116 |
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117 // No copying! |
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118 |
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119 tree_colon_expression (const tree_colon_expression&); |
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120 |
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121 tree_colon_expression& operator = (const tree_colon_expression&); |
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122 }; |
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123 |
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124 #endif |
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125 |
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126 /* |
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127 ;;; Local Variables: *** |
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128 ;;; mode: C++ *** |
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129 ;;; End: *** |
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130 */ |
