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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 #include <iostream.h> |
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28 |
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29 class tree_statement_list; |
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30 class tree_global_init_list; |
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31 class tree_if_command_list; |
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32 class tree_expression; |
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33 class tree_index_expression; |
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34 class tree_constant; |
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35 class symbol_record; |
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36 |
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37 class tree_command; |
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38 class tree_global_command; |
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39 class tree_while_command; |
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40 class tree_for_command; |
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41 class tree_if_command; |
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42 class tree_unwind_protect_command; |
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43 class tree_break_command; |
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44 class tree_continue_command; |
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45 class tree_return_command; |
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46 |
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47 #include "tree-base.h" |
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48 |
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49 // A base class for commands. |
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50 |
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51 class |
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52 tree_command : public tree |
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53 { |
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54 public: |
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55 tree_command (int l = -1, int c = -1) : tree (l, c) { } |
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56 |
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57 virtual void eval (void) = 0; |
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58 }; |
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59 |
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60 class |
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61 tree_global_command : public tree_command |
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62 { |
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63 public: |
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64 tree_global_command (int l = -1, int c = -1) : tree_command (l, c) |
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65 { init_list = 0; } |
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66 |
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67 tree_global_command (tree_global_init_list *t, int l = -1, int c = -1) |
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68 : tree_command (l, c) |
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69 { init_list = t; } |
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70 |
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71 ~tree_global_command (void); |
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72 |
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73 void eval (void); |
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74 |
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75 void print_code (ostream& os); |
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76 |
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77 private: |
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78 tree_global_init_list *init_list; |
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79 }; |
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80 |
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81 // While. |
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82 |
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83 class |
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84 tree_while_command : public tree_command |
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85 { |
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86 public: |
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87 tree_while_command (int l = -1, int c = -1) : tree_command (l, c) |
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88 { |
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89 expr = 0; |
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90 list = 0; |
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91 } |
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92 |
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93 tree_while_command (tree_expression *e, int l = -1, int c = -1) |
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94 : tree_command (l, c) |
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95 { |
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96 expr = e; |
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97 list = 0; |
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98 } |
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99 |
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100 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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101 int l = -1, int c = -1) |
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102 : tree_command (l, c) |
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103 { |
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104 expr = e; |
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105 list = lst; |
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106 } |
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107 |
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108 ~tree_while_command (void); |
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109 |
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110 void eval (void); |
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111 |
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112 void eval_error (void); |
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113 |
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114 void print_code (ostream& os); |
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115 |
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116 private: |
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117 tree_expression *expr; // Expression to test. |
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118 tree_statement_list *list; // List of commands to execute. |
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119 }; |
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120 |
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121 // For. |
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122 |
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123 class |
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124 tree_for_command : public tree_command |
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125 { |
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126 public: |
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127 tree_for_command (int l = -1, int c = -1) : tree_command (l, c) |
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128 { |
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129 id = 0; |
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130 expr = 0; |
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131 list = 0; |
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132 } |
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133 |
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134 tree_for_command (tree_index_expression *ident, tree_expression *e, |
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135 tree_statement_list *lst, int l = -1, int c = -1) |
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136 : tree_command (l, c) |
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137 { |
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138 id = ident; |
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139 expr = e; |
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140 list = lst; |
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141 } |
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142 |
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143 ~tree_for_command (void); |
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144 |
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145 void eval (void); |
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146 |
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147 void eval_error (void); |
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148 |
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149 void print_code (ostream& os); |
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150 |
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151 private: |
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152 void do_for_loop_once (tree_constant *rhs, int& quit); |
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153 |
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154 tree_index_expression *id; // Identifier to modify. |
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155 tree_expression *expr; // Expression to evaluate. |
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156 tree_statement_list *list; // List of commands to execute. |
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157 }; |
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158 |
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159 // If. |
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160 |
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161 class |
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162 tree_if_command : public tree_command |
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163 { |
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164 public: |
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165 tree_if_command (int l = -1, int c = -1) : tree_command (l, c) |
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166 { list = 0; } |
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167 |
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168 tree_if_command (tree_if_command_list *lst, int l = -1, int c = -1) |
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169 : tree_command (l, c) |
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170 { list = lst; } |
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171 |
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172 ~tree_if_command (void); |
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173 |
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174 void eval (void); |
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175 |
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176 void eval_error (void); |
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177 |
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178 void print_code (ostream& os); |
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179 |
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180 private: |
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181 tree_if_command_list *list; |
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182 }; |
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183 |
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184 // Simple exception handling. |
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185 |
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186 class |
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187 tree_unwind_protect_command : public tree_command |
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188 { |
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189 public: |
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190 tree_unwind_protect_command (int l = -1, int c = -1) : tree_command (l, c) |
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191 { |
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192 unwind_protect_code = 0; |
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193 cleanup_code = 0; |
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194 } |
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195 |
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196 tree_unwind_protect_command (tree_statement_list *tc, |
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197 tree_statement_list *cc, |
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198 int l = -1, int c = -1) |
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199 : tree_command (l, c) |
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200 { |
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201 unwind_protect_code = tc; |
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202 cleanup_code = cc; |
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203 } |
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204 |
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205 ~tree_unwind_protect_command (void); |
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206 |
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207 void eval (void); |
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208 |
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209 void print_code (ostream& os); |
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210 |
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211 private: |
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212 tree_statement_list *unwind_protect_code; |
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213 tree_statement_list *cleanup_code; |
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214 }; |
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215 |
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216 // Break. |
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217 |
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218 class |
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219 tree_break_command : public tree_command |
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220 { |
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221 public: |
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222 tree_break_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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223 |
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224 ~tree_break_command (void) { } |
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225 |
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226 void eval (void); |
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227 |
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228 void print_code (ostream& os); |
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229 }; |
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230 |
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231 // Continue. |
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232 |
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233 class |
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234 tree_continue_command : public tree_command |
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235 { |
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236 public: |
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237 tree_continue_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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238 |
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239 ~tree_continue_command (void) { } |
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240 |
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241 void eval (void); |
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242 |
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243 void print_code (ostream& os); |
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244 }; |
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245 |
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246 // Return. |
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247 |
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248 class |
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249 tree_return_command : public tree_command |
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250 { |
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251 public: |
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252 tree_return_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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253 |
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254 ~tree_return_command (void) { } |
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255 |
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256 void eval (void); |
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257 |
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258 void print_code (ostream& os); |
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259 }; |
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260 |
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261 #endif |
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262 |
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263 /* |
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264 ;;; Local Variables: *** |
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265 ;;; mode: C++ *** |
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266 ;;; page-delimiter: "^/\\*" *** |
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267 ;;; End: *** |
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268 */ |
