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1 // tree-cmd.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 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 2, or (at your option) any |
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11 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, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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_cmd_h) |
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25 #define octave_tree_cmd_h 1 |
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26 |
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27 #if defined (__GNUG__) |
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28 #pragma interface |
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29 #endif |
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30 |
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31 class tree_statement_list; |
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32 class tree_global_init_list; |
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33 class tree_if_command_list; |
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34 class tree_expression; |
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35 class tree_index_expression; |
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36 class tree_constant; |
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37 class symbol_record; |
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38 |
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39 class tree_command; |
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40 class tree_global_command; |
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41 class tree_while_command; |
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42 class tree_for_command; |
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43 class tree_if_command; |
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44 class tree_break_command; |
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45 class tree_continue_command; |
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46 class tree_return_command; |
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47 |
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48 #include "tree-base.h" |
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49 |
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50 // A base class for commands. |
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51 |
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52 class |
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53 tree_command : public tree |
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54 { |
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55 public: |
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56 tree_command (int l = -1, int c = -1) : tree (l, c) { } |
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57 |
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58 virtual void eval (void) = 0; |
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59 }; |
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60 |
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61 class |
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62 tree_global_command : public tree_command |
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63 { |
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64 public: |
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65 tree_global_command (int l = -1, int c = -1) : tree_command (l, c) |
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66 { init_list = 0; } |
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67 |
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68 tree_global_command (tree_global_init_list *t, int l = -1, int c = -1) |
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69 : tree_command (l, c) |
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70 { init_list = t; } |
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71 |
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72 ~tree_global_command (void); |
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73 |
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74 void eval (void); |
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75 |
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76 private: |
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77 tree_global_init_list *init_list; |
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78 }; |
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79 |
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80 // While. |
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81 |
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82 class |
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83 tree_while_command : public tree_command |
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84 { |
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85 public: |
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86 tree_while_command (int l = -1, int c = -1) : tree_command (l, c) |
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87 { |
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88 expr = 0; |
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89 list = 0; |
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90 } |
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91 |
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92 tree_while_command (tree_expression *e, int l = -1, int c = -1) |
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93 : tree_command (l, c) |
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94 { |
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95 expr = e; |
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96 list = 0; |
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97 } |
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98 |
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99 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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100 int l = -1, int c = -1) |
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101 : tree_command (l, c) |
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102 { |
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103 expr = e; |
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104 list = lst; |
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105 } |
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106 |
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107 ~tree_while_command (void); |
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108 |
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109 void eval (void); |
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110 |
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111 void eval_error (void); |
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112 |
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113 private: |
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114 tree_expression *expr; // Expression to test. |
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115 tree_statement_list *list; // List of commands to execute. |
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116 }; |
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117 |
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118 // For. |
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119 |
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120 class |
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121 tree_for_command : public tree_command |
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122 { |
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123 public: |
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124 tree_for_command (int l = -1, int c = -1) : tree_command (l, c) |
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125 { |
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126 id = 0; |
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127 expr = 0; |
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128 list = 0; |
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129 } |
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130 |
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131 tree_for_command (tree_index_expression *ident, tree_expression *e, |
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132 tree_statement_list *lst, int l = -1, int c = -1) |
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133 : tree_command (l, c) |
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134 { |
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135 id = ident; |
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136 expr = e; |
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137 list = lst; |
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138 } |
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139 |
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140 ~tree_for_command (void); |
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141 |
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142 void eval (void); |
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143 |
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144 void eval_error (void); |
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145 |
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146 private: |
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147 void do_for_loop_once (tree_constant *rhs, int& quit); |
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148 |
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149 tree_index_expression *id; // Identifier to modify. |
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150 tree_expression *expr; // Expression to evaluate. |
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151 tree_statement_list *list; // List of commands to execute. |
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152 }; |
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153 |
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154 // If. |
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155 |
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156 class |
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157 tree_if_command : public tree_command |
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158 { |
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159 public: |
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160 tree_if_command (int l = -1, int c = -1) : tree_command (l, c) |
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161 { list = 0; } |
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162 |
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163 tree_if_command (tree_if_command_list *lst, int l = -1, int c = -1) |
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164 : tree_command (l, c) |
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165 { list = lst; } |
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166 |
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167 ~tree_if_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 private: |
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174 tree_if_command_list *list; |
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175 }; |
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176 |
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177 // Break. |
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178 |
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179 class |
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180 tree_break_command : public tree_command |
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181 { |
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182 public: |
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183 tree_break_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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184 |
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185 ~tree_break_command (void) { } |
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186 |
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187 void eval (void); |
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188 }; |
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189 |
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190 // Continue. |
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191 |
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192 class |
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193 tree_continue_command : public tree_command |
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194 { |
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195 public: |
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196 tree_continue_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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197 |
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198 ~tree_continue_command (void) { } |
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199 |
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200 void eval (void); |
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201 }; |
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202 |
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203 // Return. |
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204 |
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205 class |
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206 tree_return_command : public tree_command |
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207 { |
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208 public: |
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209 tree_return_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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210 |
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211 ~tree_return_command (void) { } |
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212 |
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213 void eval (void); |
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214 }; |
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215 |
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216 #endif |
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217 |
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218 /* |
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219 ;;; Local Variables: *** |
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220 ;;; mode: C++ *** |
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221 ;;; page-delimiter: "^/\\*" *** |
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222 ;;; End: *** |
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223 */ |
