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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, 1995 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_identifier; |
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35 class tree_constant; |
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36 class symbol_record; |
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37 |
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38 class tree_command; |
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39 class tree_global_command; |
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40 class tree_while_command; |
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41 class tree_for_command; |
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42 class tree_if_command; |
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43 class tree_unwind_protect_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 void print_code (ostream& os); |
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77 |
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78 private: |
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79 tree_global_init_list *init_list; |
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80 }; |
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81 |
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82 // While. |
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83 |
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84 class |
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85 tree_while_command : public tree_command |
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86 { |
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87 public: |
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88 tree_while_command (int l = -1, int c = -1) : tree_command (l, c) |
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89 { |
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90 expr = 0; |
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91 list = 0; |
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92 } |
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93 |
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94 tree_while_command (tree_expression *e, int l = -1, int c = -1) |
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95 : tree_command (l, c) |
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96 { |
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97 expr = e; |
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98 list = 0; |
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99 } |
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100 |
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101 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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102 int l = -1, int c = -1) |
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103 : tree_command (l, c) |
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104 { |
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105 expr = e; |
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106 list = lst; |
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107 } |
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108 |
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109 ~tree_while_command (void); |
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110 |
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111 void eval (void); |
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112 |
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113 void eval_error (void); |
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114 |
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115 void print_code (ostream& os); |
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116 |
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117 private: |
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118 tree_expression *expr; // Expression to test. |
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119 tree_statement_list *list; // List of commands to execute. |
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120 }; |
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121 |
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122 // For. |
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123 |
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124 class |
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125 tree_for_command : public tree_command |
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126 { |
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127 public: |
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128 tree_for_command (int l = -1, int c = -1) : tree_command (l, c) |
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129 { |
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130 id = 0; |
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131 expr = 0; |
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132 list = 0; |
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133 } |
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134 |
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135 tree_for_command (tree_index_expression *ident, tree_expression *e, |
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136 tree_statement_list *lst, int l = -1, int c = -1) |
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137 : tree_command (l, c) |
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138 { |
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139 id = ident; |
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140 expr = e; |
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141 list = lst; |
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142 } |
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143 |
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144 ~tree_for_command (void); |
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145 |
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146 void eval (void); |
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147 |
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148 void eval_error (void); |
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149 |
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150 void print_code (ostream& os); |
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151 |
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152 private: |
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153 void do_for_loop_once (tree_identifier *ident, |
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154 tree_constant& rhs, int& quit); |
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155 |
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156 void do_for_loop_once (tree_constant& rhs, int& quit); |
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157 |
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158 tree_index_expression *id; // Identifier to modify. |
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159 tree_expression *expr; // Expression to evaluate. |
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160 tree_statement_list *list; // List of commands to execute. |
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161 }; |
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162 |
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163 // If. |
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164 |
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165 class |
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166 tree_if_command : public tree_command |
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167 { |
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168 public: |
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169 tree_if_command (int l = -1, int c = -1) : tree_command (l, c) |
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170 { list = 0; } |
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171 |
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172 tree_if_command (tree_if_command_list *lst, int l = -1, int c = -1) |
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173 : tree_command (l, c) |
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174 { list = lst; } |
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175 |
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176 ~tree_if_command (void); |
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177 |
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178 void eval (void); |
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179 |
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180 void eval_error (void); |
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181 |
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182 void print_code (ostream& os); |
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183 |
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184 private: |
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185 tree_if_command_list *list; |
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186 }; |
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187 |
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188 // Simple exception handling. |
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189 |
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190 class |
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191 tree_unwind_protect_command : public tree_command |
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192 { |
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193 public: |
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194 tree_unwind_protect_command (int l = -1, int c = -1) : tree_command (l, c) |
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195 { |
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196 unwind_protect_code = 0; |
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197 cleanup_code = 0; |
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198 } |
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199 |
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200 tree_unwind_protect_command (tree_statement_list *tc, |
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201 tree_statement_list *cc, |
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202 int l = -1, int c = -1) |
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203 : tree_command (l, c) |
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204 { |
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205 unwind_protect_code = tc; |
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206 cleanup_code = cc; |
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207 } |
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208 |
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209 ~tree_unwind_protect_command (void); |
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210 |
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211 void eval (void); |
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212 |
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213 void print_code (ostream& os); |
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214 |
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215 private: |
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216 tree_statement_list *unwind_protect_code; |
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217 tree_statement_list *cleanup_code; |
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218 }; |
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219 |
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220 // Break. |
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221 |
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222 class |
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223 tree_break_command : public tree_command |
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224 { |
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225 public: |
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226 tree_break_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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227 |
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228 ~tree_break_command (void) { } |
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229 |
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230 void eval (void); |
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231 |
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232 void print_code (ostream& os); |
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233 }; |
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234 |
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235 // Continue. |
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236 |
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237 class |
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238 tree_continue_command : public tree_command |
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239 { |
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240 public: |
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241 tree_continue_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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242 |
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243 ~tree_continue_command (void) { } |
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244 |
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245 void eval (void); |
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246 |
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247 void print_code (ostream& os); |
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248 }; |
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249 |
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250 // Return. |
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251 |
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252 class |
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253 tree_return_command : public tree_command |
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254 { |
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255 public: |
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256 tree_return_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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257 |
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258 ~tree_return_command (void) { } |
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259 |
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260 void eval (void); |
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261 |
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262 void print_code (ostream& os); |
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263 }; |
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264 |
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265 #endif |
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266 |
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267 /* |
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268 ;;; Local Variables: *** |
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269 ;;; mode: C++ *** |
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270 ;;; page-delimiter: "^/\\*" *** |
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271 ;;; End: *** |
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272 */ |
