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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_cmd_h) |
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24 #define octave_tree_cmd_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 class octave_value_list; |
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33 |
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34 class tree_statement_list; |
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35 class tree_decl_init_list; |
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36 class tree_if_command_list; |
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37 class tree_switch_case_list; |
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38 class tree_expression; |
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39 class tree_index_expression; |
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40 class tree_identifier; |
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41 class tree_return_list; |
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42 class octave_value; |
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43 class symbol_record; |
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44 |
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45 class tree_command; |
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46 class tree_decl_command; |
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47 class tree_global_command; |
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48 class tree_static_command; |
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49 class tree_while_command; |
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50 class tree_for_command; |
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51 class tree_if_command; |
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52 class tree_switch_command; |
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53 class tree_try_catch_command; |
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54 class tree_unwind_protect_command; |
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55 class tree_no_op_command; |
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56 class tree_break_command; |
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57 class tree_continue_command; |
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58 class tree_return_command; |
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59 |
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60 class tree_walker; |
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61 |
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62 #include <string> |
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63 |
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64 #include "pt-base.h" |
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65 |
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66 // A base class for commands. |
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67 |
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68 class |
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69 tree_command : public tree |
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70 { |
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71 public: |
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72 |
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73 tree_command (int l = -1, int c = -1) : tree (l, c) { } |
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74 |
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75 virtual ~tree_command (void) { } |
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76 |
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77 virtual void eval (void) = 0; |
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78 }; |
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79 |
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80 // Base class for declaration commands -- global, static, etc. |
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81 |
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82 class |
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83 tree_decl_command : public tree_command |
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84 { |
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85 public: |
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86 |
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87 tree_decl_command (const string& n, int l = -1, int c = -1) |
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88 : tree_command (l, c), cmd_name (n), initialized (false), init_list (0) { } |
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89 |
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90 tree_decl_command (const string& n, tree_decl_init_list *t, |
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91 int l = -1, int c = -1) |
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92 : tree_command (l, c), cmd_name (n), initialized (false), init_list (t) { } |
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93 |
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94 ~tree_decl_command (void); |
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95 |
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96 tree_decl_init_list *initializer_list (void) { return init_list; } |
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97 |
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98 void accept (tree_walker& tw); |
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99 |
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100 string name (void) { return cmd_name; } |
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101 |
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102 protected: |
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103 |
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104 // The name of this command -- global, static, etc. |
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105 string cmd_name; |
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106 |
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107 // TRUE if this command has been evaluated. |
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108 bool initialized; |
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109 |
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110 // The list of variables or initializers in this declaration command. |
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111 tree_decl_init_list *init_list; |
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112 }; |
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113 |
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114 // Global. |
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115 |
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116 class |
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117 tree_global_command : public tree_decl_command |
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118 { |
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119 public: |
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120 |
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121 tree_global_command (int l = -1, int c = -1) |
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122 : tree_decl_command ("global", l, c) { } |
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123 |
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124 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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125 : tree_decl_command ("global", t, l, c) { } |
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126 |
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127 ~tree_global_command (void) { } |
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128 |
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129 void eval (void); |
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130 }; |
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131 |
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132 // Static. |
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133 |
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134 class |
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135 tree_static_command : public tree_decl_command |
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136 { |
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137 public: |
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138 |
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139 tree_static_command (int l = -1, int c = -1) |
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140 : tree_decl_command ("static", l, c) { } |
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141 |
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142 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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143 : tree_decl_command ("static", t, l, c) { } |
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144 |
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145 ~tree_static_command (void) { } |
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146 |
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147 void eval (void); |
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148 }; |
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149 |
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150 // While. |
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151 |
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152 class |
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153 tree_while_command : public tree_command |
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154 { |
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155 public: |
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156 |
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157 tree_while_command (int l = -1, int c = -1) |
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158 : tree_command (l, c), expr (0), list (0) { } |
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159 |
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160 tree_while_command (tree_expression *e, int l = -1, int c = -1) |
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161 : tree_command (l, c), expr (e), list (0) { } |
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162 |
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163 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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164 int l = -1, int c = -1) |
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165 : tree_command (l, c), expr (e), list (lst) { } |
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166 |
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167 ~tree_while_command (void); |
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168 |
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169 void eval (void); |
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170 |
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171 void eval_error (void); |
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172 |
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173 tree_expression *condition (void) { return expr; } |
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174 |
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175 tree_statement_list *body (void) { return list; } |
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176 |
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177 void accept (tree_walker& tw); |
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178 |
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179 private: |
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180 |
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181 // Expression to test. |
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182 tree_expression *expr; |
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183 |
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184 // List of commands to execute. |
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185 tree_statement_list *list; |
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186 }; |
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187 |
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188 // For. |
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189 |
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190 class |
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191 tree_for_command : public tree_command |
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192 { |
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193 public: |
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194 |
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195 tree_for_command (int l = -1, int c = -1) |
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196 : tree_command (l, c), id (0), id_list (0), expr (0), list (0) { } |
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197 |
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198 tree_for_command (tree_index_expression *ident, tree_expression *e, |
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199 tree_statement_list *lst, int l = -1, int c = -1) |
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200 : tree_command (l, c), id (ident), id_list (0), expr (e), |
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201 list (lst) { } |
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202 |
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203 tree_for_command (tree_return_list *ident, tree_expression *e, |
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204 tree_statement_list *lst, int l = -1, int c = -1) |
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205 : tree_command (l, c), id (0), id_list (ident), expr (e), |
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206 list (lst) { } |
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207 |
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208 ~tree_for_command (void); |
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209 |
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210 void eval (void); |
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211 |
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212 void eval_error (void); |
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213 |
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214 tree_index_expression *ident (void) { return id; } |
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215 |
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216 tree_expression *control_expr (void) { return expr; } |
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217 |
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218 tree_statement_list *body (void) { return list; } |
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219 |
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220 void accept (tree_walker& tw); |
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221 |
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222 private: |
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223 |
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224 // Identifier to modify. |
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225 tree_index_expression *id; |
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226 |
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227 // List of identifiers to modify. |
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228 tree_return_list *id_list; |
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229 |
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230 // Expression to evaluate. |
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231 tree_expression *expr; |
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232 |
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233 // List of commands to execute. |
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234 tree_statement_list *list; |
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235 |
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236 void do_for_loop_once (tree_return_list *lst, |
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237 const octave_value_list& rhs, bool& quit); |
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238 |
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239 void do_for_loop_once (tree_index_expression *idx_expr, |
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240 const octave_value& rhs, bool& quit); |
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241 |
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242 void do_for_loop_once (tree_identifier *ident, |
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243 octave_value& rhs, bool& quit); |
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244 }; |
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245 |
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246 // If. |
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247 |
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248 class |
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249 tree_if_command : public tree_command |
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250 { |
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251 public: |
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252 |
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253 tree_if_command (int l = -1, int c = -1) |
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254 : tree_command (l, c), list (0) { } |
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255 |
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256 tree_if_command (tree_if_command_list *lst, int l = -1, int c = -1) |
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257 : tree_command (l, c), list (lst) { } |
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258 |
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259 ~tree_if_command (void); |
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260 |
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261 void eval (void); |
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262 |
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263 tree_if_command_list *cmd_list (void) { return list; } |
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264 |
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265 void accept (tree_walker& tw); |
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266 |
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267 private: |
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268 |
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269 // List of if commands (if, elseif, elseif, ... else, endif) |
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270 tree_if_command_list *list; |
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271 }; |
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272 |
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273 // Switch. |
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274 |
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275 class |
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276 tree_switch_command : public tree_command |
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277 { |
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278 public: |
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279 |
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280 tree_switch_command (int l = -1, int c = -1) |
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281 : tree_command (l, c), expr (0), list (0) { } |
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282 |
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283 tree_switch_command (tree_expression *e, tree_switch_case_list *lst, |
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284 int l = -1, int c = -1) |
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285 : tree_command (l, c), expr (e), list (lst) { } |
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286 |
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287 ~tree_switch_command (void); |
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288 |
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289 void eval (void); |
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290 |
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291 void eval_error (void); |
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292 |
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293 tree_expression *switch_value (void) { return expr; } |
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294 |
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295 tree_switch_case_list *case_list (void) { return list; } |
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296 |
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297 void accept (tree_walker& tw); |
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298 |
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299 private: |
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300 |
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301 // Value on which to switch. |
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302 tree_expression *expr; |
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303 |
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304 // List of cases (case 1, case 2, ..., default) |
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305 tree_switch_case_list *list; |
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306 }; |
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307 |
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308 // Simple exception handling. |
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309 |
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310 class |
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311 tree_unwind_protect_command : public tree_command |
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312 { |
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313 public: |
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314 |
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315 tree_unwind_protect_command (int l = -1, int c = -1) |
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316 : tree_command (l, c), unwind_protect_code (0), cleanup_code (0) { } |
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317 |
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318 tree_unwind_protect_command (tree_statement_list *tc, |
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319 tree_statement_list *cc, |
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320 int l = -1, int c = -1) |
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321 : tree_command (l, c), unwind_protect_code (tc), cleanup_code (cc) { } |
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322 |
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323 ~tree_unwind_protect_command (void); |
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324 |
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325 void eval (void); |
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326 |
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327 tree_statement_list *body (void) { return unwind_protect_code; } |
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328 |
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329 tree_statement_list *cleanup (void) { return cleanup_code; } |
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330 |
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331 void accept (tree_walker& tw); |
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332 |
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333 private: |
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334 |
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335 // The first body of code to attempt to execute. |
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336 tree_statement_list *unwind_protect_code; |
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337 |
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338 // The body of code to execute no matter what happens in the first |
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339 // body of code. |
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340 tree_statement_list *cleanup_code; |
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341 }; |
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342 |
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343 // Simple exception handling. |
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344 |
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345 class |
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346 tree_try_catch_command : public tree_command |
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347 { |
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348 public: |
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349 |
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350 tree_try_catch_command (int l = -1, int c = -1) |
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351 : tree_command (l, c), try_code (0), catch_code (0) { } |
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352 |
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353 tree_try_catch_command (tree_statement_list *tc, |
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354 tree_statement_list *cc, |
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355 int l = -1, int c = -1) |
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356 : tree_command (l, c), try_code (tc), catch_code (cc) { } |
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357 |
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358 ~tree_try_catch_command (void); |
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359 |
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360 void eval (void); |
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361 |
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362 tree_statement_list *body (void) { return try_code; } |
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363 |
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364 tree_statement_list *cleanup (void) { return catch_code; } |
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365 |
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366 void accept (tree_walker& tw); |
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367 |
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368 private: |
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369 |
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370 // The first block of code to attempt to execute. |
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371 tree_statement_list *try_code; |
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372 |
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373 // The code to execute if an error occurs in the first block. |
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374 tree_statement_list *catch_code; |
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375 }; |
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376 |
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377 // No-op. |
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378 |
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379 class |
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380 tree_no_op_command : public tree_command |
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381 { |
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382 public: |
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383 |
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384 tree_no_op_command (const string& cmd = "no_op", int l = -1, int c = -1) |
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385 : tree_command (l, c), orig_cmd (cmd) { } |
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386 |
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387 ~tree_no_op_command (void) { } |
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388 |
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389 void eval (void) { } |
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390 |
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391 void accept (tree_walker& tw); |
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392 |
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393 string original_command (void) { return orig_cmd; } |
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394 |
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395 private: |
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396 |
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397 string orig_cmd; |
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398 }; |
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399 |
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400 // Break. |
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401 |
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402 class |
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403 tree_break_command : public tree_command |
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404 { |
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405 public: |
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406 |
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407 tree_break_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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408 |
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409 ~tree_break_command (void) { } |
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410 |
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411 void eval (void); |
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412 |
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413 void accept (tree_walker& tw); |
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414 }; |
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415 |
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416 // Continue. |
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417 |
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418 class |
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419 tree_continue_command : public tree_command |
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420 { |
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421 public: |
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422 |
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423 tree_continue_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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424 |
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425 ~tree_continue_command (void) { } |
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426 |
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427 void eval (void); |
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428 |
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429 void accept (tree_walker& tw); |
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430 }; |
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431 |
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578
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432 // Return. |
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433 |
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434 class |
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435 tree_return_command : public tree_command |
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436 { |
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437 public: |
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438 |
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439 tree_return_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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440 |
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441 ~tree_return_command (void) { } |
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442 |
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443 void eval (void); |
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444 |
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445 void accept (tree_walker& tw); |
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446 }; |
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447 |
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448 #endif |
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449 |
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450 /* |
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451 ;;; Local Variables: *** |
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452 ;;; mode: C++ *** |
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453 ;;; End: *** |
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454 */ |
