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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_stmt_h) |
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24 #define octave_tree_stmt_h 1 |
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25 |
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26 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <SLList.h> |
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31 |
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32 class octave_value_list; |
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33 |
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34 class tree_command; |
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35 class tree_expression; |
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36 |
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37 class tree_walker; |
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38 |
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39 #include "comment-list.h" |
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40 |
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41 // A statement is either a command to execute or an expression to |
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42 // evaluate. |
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43 |
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44 class |
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45 tree_statement |
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46 { |
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47 public: |
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48 |
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49 tree_statement (void) |
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50 : cmd (0), expr (0), comm (0), print_flag (true) { } |
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51 |
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52 tree_statement (tree_command *c, octave_comment_list *cl) |
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53 : cmd (c), expr (0), comm (cl), print_flag (true) { } |
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54 |
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55 tree_statement (tree_expression *e, octave_comment_list *cl) |
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56 : cmd (0), expr (e), comm (cl), print_flag (true) { } |
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57 |
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58 ~tree_statement (void); |
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59 |
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60 void set_print_flag (bool print) { print_flag = print; } |
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61 |
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62 bool is_command (void) { return cmd != 0; } |
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63 |
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64 bool is_expression (void) { return expr != 0; } |
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65 |
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66 int line (void); |
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67 int column (void); |
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68 |
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69 void maybe_echo_code (bool in_function_body); |
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70 |
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71 bool print_result (void) { return print_flag; } |
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72 |
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73 tree_command *command (void) { return cmd; } |
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74 |
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75 octave_value_list eval (bool silent, int nargout, bool in_function_body); |
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76 |
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77 tree_expression *expression (void) { return expr; } |
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78 |
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79 octave_comment_list *comment_text (void) { return comm; } |
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80 |
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81 void accept (tree_walker& tw); |
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82 |
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83 private: |
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84 |
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85 // Only one of cmd or expr can be valid at once. |
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86 |
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87 // Command to execute. |
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88 tree_command *cmd; |
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89 |
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90 // Expression to evaluate. |
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91 tree_expression *expr; |
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92 |
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93 // Comment associated with this statement. |
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94 octave_comment_list *comm; |
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95 |
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96 // Print result of eval for this command? |
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97 bool print_flag; |
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98 |
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99 // No copying! |
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100 tree_statement (const tree_statement&); |
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101 |
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102 tree_statement& operator = (const tree_statement&); |
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103 }; |
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104 |
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105 // A list of statements to evaluate. |
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106 |
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107 class |
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108 tree_statement_list |
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109 { |
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110 public: |
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111 |
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112 tree_statement_list (void) |
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113 : lst (), function_body (false) { } |
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114 |
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115 tree_statement_list (tree_statement *s) |
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116 : lst (), function_body (false) { lst.append (s); } |
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117 |
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118 ~tree_statement_list (void) |
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119 { |
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120 while (! lst.empty ()) |
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121 { |
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122 tree_statement *t = lst.remove_front (); |
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123 delete t; |
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124 } |
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125 } |
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126 |
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127 void append (tree_statement *&s) { lst.append (s); } |
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128 void append (tree_statement * const &s) { lst.append (s); } |
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129 |
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130 tree_statement *&operator () (Pix p) { return lst (p); } |
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131 |
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132 tree_statement * const &operator () (Pix p) const { return lst (p); } |
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133 |
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134 Pix first (void) const { return lst.first (); } |
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135 |
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136 void next (Pix& p) const { return lst.next (p); } |
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137 |
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138 tree_statement *front (void) { return lst.front (); } |
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139 tree_statement *rear (void) { return lst.rear (); } |
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140 |
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141 const tree_statement *front (void) const { return lst.front (); } |
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142 const tree_statement *rear (void) const { return lst.rear (); } |
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143 |
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144 void mark_as_function_body (void) { function_body = true; } |
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145 |
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146 octave_value_list eval (bool silent = false, int nargout = 0); |
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147 |
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148 int set_breakpoint (int line); |
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149 |
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150 void delete_breakpoint (int line); |
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151 |
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152 octave_value_list list_breakpoints (void); |
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153 |
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154 void accept (tree_walker& tw); |
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155 |
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156 private: |
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157 |
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158 // List of statements to evaluate. |
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159 SLList<tree_statement *> lst; |
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160 |
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161 // Does this list of statements make up the body of a function? |
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162 bool function_body; |
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163 |
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164 // No copying! |
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165 |
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166 tree_statement_list (const tree_statement_list&); |
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167 |
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168 tree_statement_list& operator = (const tree_statement_list&); |
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169 }; |
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170 |
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171 // Pointer to the current statement being executed. |
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172 extern tree_statement *curr_statement; |
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173 |
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174 #endif |
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175 |
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176 /* |
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177 ;;; Local Variables: *** |
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178 ;;; mode: C++ *** |
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179 ;;; End: *** |
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180 */ |
