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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 #include <iostream.h> |
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32 |
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33 class Octave_object; |
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34 |
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35 class tree_statement_list; |
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36 class tree_global_init_list; |
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37 class tree_if_command_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 tree_constant; |
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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_global_command; |
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47 class tree_while_command; |
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48 class tree_for_command; |
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49 class tree_if_command; |
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50 class tree_unwind_protect_command; |
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51 class tree_break_command; |
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52 class tree_continue_command; |
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53 class tree_return_command; |
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54 |
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55 #include "tree-base.h" |
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56 |
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57 // A base class for commands. |
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58 |
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59 class |
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60 tree_command : public tree |
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61 { |
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62 public: |
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63 tree_command (int l = -1, int c = -1) : tree (l, c) { } |
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64 |
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65 virtual ~tree_command (void) { } |
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66 |
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67 virtual void eval (void) = 0; |
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68 }; |
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69 |
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70 class |
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71 tree_global_command : public tree_command |
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72 { |
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73 public: |
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74 tree_global_command (int l = -1, int c = -1) : tree_command (l, c) |
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75 { init_list = 0; } |
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76 |
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77 tree_global_command (tree_global_init_list *t, int l = -1, int c = -1) |
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78 : tree_command (l, c) |
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79 { init_list = t; } |
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80 |
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81 ~tree_global_command (void); |
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82 |
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83 void eval (void); |
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84 |
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85 void print_code (ostream& os); |
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86 |
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87 private: |
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88 tree_global_init_list *init_list; |
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89 }; |
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90 |
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91 // While. |
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92 |
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93 class |
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94 tree_while_command : public tree_command |
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95 { |
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96 public: |
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97 tree_while_command (int l = -1, int c = -1) : tree_command (l, c) |
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98 { |
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99 expr = 0; |
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100 list = 0; |
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101 } |
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102 |
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103 tree_while_command (tree_expression *e, int l = -1, int c = -1) |
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104 : tree_command (l, c) |
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105 { |
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106 expr = e; |
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107 list = 0; |
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108 } |
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109 |
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110 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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111 int l = -1, int c = -1) |
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112 : tree_command (l, c) |
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113 { |
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114 expr = e; |
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115 list = lst; |
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116 } |
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117 |
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118 ~tree_while_command (void); |
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119 |
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120 void eval (void); |
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121 |
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122 void eval_error (void); |
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123 |
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124 void print_code (ostream& os); |
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125 |
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126 private: |
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127 tree_expression *expr; // Expression to test. |
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128 tree_statement_list *list; // List of commands to execute. |
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129 }; |
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130 |
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131 // For. |
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132 |
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133 class |
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134 tree_for_command : public tree_command |
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135 { |
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136 public: |
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137 tree_for_command (int l = -1, int c = -1) : tree_command (l, c) |
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138 { |
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139 id = 0; |
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140 id_list = 0; |
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141 expr = 0; |
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142 list = 0; |
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143 } |
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144 |
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145 tree_for_command (tree_index_expression *ident, tree_expression *e, |
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146 tree_statement_list *lst, int l = -1, int c = -1) |
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147 : tree_command (l, c) |
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148 { |
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149 id = ident; |
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150 id_list = 0; |
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151 expr = e; |
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152 list = lst; |
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153 } |
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154 |
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155 tree_for_command (tree_return_list *ident, tree_expression *e, |
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156 tree_statement_list *lst, int l = -1, int c = -1) |
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157 : tree_command (l, c) |
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158 { |
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159 id = 0; |
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160 id_list = ident; |
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161 expr = e; |
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162 list = lst; |
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163 } |
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164 |
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165 ~tree_for_command (void); |
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166 |
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167 void eval (void); |
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168 |
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169 void eval_error (void); |
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170 |
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171 void print_code (ostream& os); |
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172 |
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173 private: |
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174 void do_for_loop_once (tree_return_list *lst, |
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175 const Octave_object& rhs, int& quit); |
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176 |
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177 void do_for_loop_once (tree_index_expression *idx_expr, |
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178 const tree_constant& rhs, int& quit); |
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179 |
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180 void do_for_loop_once (tree_identifier *ident, |
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181 tree_constant& rhs, int& quit); |
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182 |
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183 tree_index_expression *id; // Identifier to modify. |
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184 tree_return_list *id_list; // List of identifiers to modify. |
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185 tree_expression *expr; // Expression to evaluate. |
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186 tree_statement_list *list; // List of commands to execute. |
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187 }; |
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188 |
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189 // If. |
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190 |
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191 class |
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192 tree_if_command : public tree_command |
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193 { |
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194 public: |
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195 tree_if_command (int l = -1, int c = -1) : tree_command (l, c) |
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196 { list = 0; } |
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197 |
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198 tree_if_command (tree_if_command_list *lst, int l = -1, int c = -1) |
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199 : tree_command (l, c) |
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200 { list = lst; } |
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201 |
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202 ~tree_if_command (void); |
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203 |
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204 void eval (void); |
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205 |
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206 void eval_error (void); |
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207 |
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208 void print_code (ostream& os); |
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209 |
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210 private: |
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211 tree_if_command_list *list; |
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212 }; |
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213 |
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214 // Simple exception handling. |
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215 |
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216 class |
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217 tree_unwind_protect_command : public tree_command |
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218 { |
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219 public: |
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220 tree_unwind_protect_command (int l = -1, int c = -1) : tree_command (l, c) |
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221 { |
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222 unwind_protect_code = 0; |
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223 cleanup_code = 0; |
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224 } |
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225 |
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226 tree_unwind_protect_command (tree_statement_list *tc, |
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227 tree_statement_list *cc, |
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228 int l = -1, int c = -1) |
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229 : tree_command (l, c) |
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230 { |
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231 unwind_protect_code = tc; |
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232 cleanup_code = cc; |
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233 } |
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234 |
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235 ~tree_unwind_protect_command (void); |
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236 |
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237 void eval (void); |
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238 |
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239 void print_code (ostream& os); |
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240 |
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241 private: |
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242 tree_statement_list *unwind_protect_code; |
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243 tree_statement_list *cleanup_code; |
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244 }; |
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245 |
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246 // Break. |
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247 |
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248 class |
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249 tree_break_command : public tree_command |
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250 { |
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251 public: |
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252 tree_break_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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253 |
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254 ~tree_break_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 // Continue. |
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262 |
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263 class |
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264 tree_continue_command : public tree_command |
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265 { |
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266 public: |
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267 tree_continue_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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268 |
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269 ~tree_continue_command (void) { } |
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270 |
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271 void eval (void); |
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272 |
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273 void print_code (ostream& os); |
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274 }; |
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275 |
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276 // Return. |
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277 |
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278 class |
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279 tree_return_command : public tree_command |
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280 { |
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281 public: |
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282 tree_return_command (int l = -1, int c = -1) : tree_command (l, c) { } |
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283 |
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284 ~tree_return_command (void) { } |
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285 |
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286 void eval (void); |
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287 |
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288 void print_code (ostream& os); |
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289 }; |
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290 |
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291 #endif |
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292 |
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293 /* |
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294 ;;; Local Variables: *** |
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295 ;;; mode: C++ *** |
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296 ;;; page-delimiter: "^/\\*" *** |
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297 ;;; End: *** |
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298 */ |
