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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_index_h) |
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25 #define octave_tree_index_h 1 |
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26 |
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27 #include <list> |
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28 |
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29 class tree_argument_list; |
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30 |
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31 class tree_walker; |
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32 |
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33 class Octave_map; |
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34 class octave_value; |
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35 class octave_value_list; |
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36 class octave_lvalue; |
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37 |
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38 #include "str-vec.h" |
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39 |
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40 #include "pt-exp.h" |
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41 |
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42 // Index expressions. |
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43 |
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44 class |
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45 tree_index_expression : public tree_expression |
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46 { |
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47 public: |
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48 |
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49 tree_index_expression (tree_expression *e = 0, tree_argument_list *lst = 0, |
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50 int l = -1, int c = -1, char t = '('); |
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51 |
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52 tree_index_expression (tree_expression *e, const std::string& n, |
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53 int l = -1, int c = -1); |
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54 |
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55 tree_index_expression (tree_expression *e, tree_expression* df, |
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56 int l = -1, int c = -1); |
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57 |
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58 ~tree_index_expression (void); |
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59 |
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60 bool has_magic_end (void) const; |
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61 |
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62 void append (tree_argument_list *lst = 0, char t = '('); |
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63 |
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64 void append (const std::string& n); |
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65 |
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66 void append (tree_expression *df); |
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67 |
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68 bool is_index_expression (void) const { return true; } |
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69 |
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70 std::string name (void) const; |
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71 |
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72 tree_expression *expression (void) { return expr; } |
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73 |
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74 std::list<tree_argument_list *> arg_lists (void) { return args; } |
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75 |
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76 std::string type_tags (void) { return type; } |
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77 |
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78 std::list<string_vector> arg_names (void) { return arg_nm; } |
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79 |
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80 bool lvalue_ok (void) const { return expr->lvalue_ok (); } |
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81 |
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82 bool rvalue_ok (void) const { return true; } |
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83 |
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84 octave_value rvalue (void); |
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85 |
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86 octave_value_list rvalue (int nargout); |
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87 |
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88 octave_lvalue lvalue (void); |
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89 |
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90 void eval_error (void) const; |
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91 |
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92 void accept (tree_walker& tw); |
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93 |
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94 private: |
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95 |
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96 // The LHS of this index expression. |
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97 tree_expression *expr; |
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98 |
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99 // The indices (only valid if type == paren || type == brace). |
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100 std::list<tree_argument_list *> args; |
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101 |
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102 // The type of this index expression. |
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103 std::string type; |
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104 |
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105 // The names of the arguments. Used for constant struct element |
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106 // references. |
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107 std::list<string_vector> arg_nm; |
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108 |
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109 // The list of dynamic field names, if any. |
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110 std::list<tree_expression *> dyn_field; |
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111 |
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112 Octave_map make_arg_struct (void) const; |
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113 |
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114 std::string |
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115 get_struct_index |
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116 (std::list<string_vector>::const_iterator p_arg_nm, |
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117 std::list<tree_expression *>::const_iterator p_dyn_field) const; |
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118 |
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119 // No copying! |
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120 |
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121 tree_index_expression (const tree_index_expression&); |
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122 |
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123 tree_index_expression& operator = (const tree_index_expression&); |
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124 }; |
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125 |
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126 #endif |
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127 |
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128 /* |
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129 ;;; Local Variables: *** |
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130 ;;; mode: C++ *** |
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131 ;;; End: *** |
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132 */ |
