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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 (octave_tree_identifier_h) |
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24 #define octave_tree_identifier_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 class ostream; |
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31 |
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32 #include <string> |
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33 |
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34 class octave_symbol; |
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35 class octave_function; |
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36 class symbol_record; |
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37 |
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38 class tree_walker; |
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39 |
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40 #include "pt-mvr-base.h" |
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41 |
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42 // Symbols from the symbol table. |
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43 |
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44 class |
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45 tree_identifier : public tree_multi_val_ret |
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46 { |
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47 friend class tree_index_expression; |
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48 |
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49 public: |
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50 |
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51 tree_identifier (int l = -1, int c = -1) |
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52 : tree_multi_val_ret (l, c), sym (0), maybe_do_ans_assign (false) { } |
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53 |
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54 tree_identifier (symbol_record *s, int l = -1, int c = -1) |
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55 : tree_multi_val_ret (l, c), sym (s), maybe_do_ans_assign (false) { } |
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56 |
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57 ~tree_identifier (void) { } |
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58 |
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59 bool is_identifier (void) const |
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60 { return true; } |
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61 |
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62 string name (void) const; |
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63 |
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64 tree_identifier *define (octave_symbol *s, unsigned int sym_type); |
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65 |
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66 tree_identifier *define (octave_function *f, unsigned int sym_type); |
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67 |
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68 tree_identifier *define (const octave_value& v); |
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69 |
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70 void document (const string& s); |
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71 |
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72 octave_value assign (octave_value::assign_op op, |
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73 const octave_value& t); |
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74 |
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75 octave_value assign (octave_value::assign_op op, |
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76 const octave_value_list& args, |
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77 const octave_value& t); |
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78 |
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79 bool is_defined (void); |
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80 |
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81 void increment (void); |
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82 |
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83 void decrement (void); |
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84 |
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85 octave_symbol *do_lookup (bool& script_file_executed, bool |
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86 exec_script = true); |
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87 |
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88 void link_to_global (void); |
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89 |
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90 void mark_as_static (void); |
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91 |
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92 void mark_as_formal_parameter (void); |
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93 |
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94 void mark_for_possible_ans_assign (void) |
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95 { maybe_do_ans_assign = true; } |
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96 |
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97 octave_value eval (bool print = false); |
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98 |
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99 octave_value_list eval (bool print, int nargout, |
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100 const octave_value_list& args); |
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101 |
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102 void eval_undefined_error (void); |
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103 |
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104 void accept (tree_walker& tw); |
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105 |
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106 octave_value value (void) const; |
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107 |
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108 octave_value& reference (void); |
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109 |
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110 private: |
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111 |
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112 // The symbol record that this identifier references. |
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113 symbol_record *sym; |
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114 |
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115 // True if we should consider assigning the result of evaluating |
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116 // this identifier to the built-in variable ans. |
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117 bool maybe_do_ans_assign; |
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118 }; |
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119 |
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120 #endif |
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121 |
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122 /* |
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123 ;;; Local Variables: *** |
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124 ;;; mode: C++ *** |
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125 ;;; End: *** |
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126 */ |
