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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_loop_h) |
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24 #define octave_tree_loop_h 1 |
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25 |
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26 #if defined (__GNUG__) && ! defined (NO_PRAGMA_INTERFACE_IMPLEMENTATION) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 class octave_value; |
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31 class octave_lvalue; |
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32 |
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33 class tree_argument_list; |
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34 class tree_expression; |
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35 class tree_statement_list; |
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36 |
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37 class tree_walker; |
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38 |
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39 #include "comment-list.h" |
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40 #include "pt-cmd.h" |
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41 |
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42 // TRUE means we are evaluating some kind of looping construct. |
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43 extern bool evaluating_looping_command; |
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44 |
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45 // While. |
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46 |
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47 class |
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48 tree_while_command : public tree_command |
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49 { |
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50 public: |
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51 |
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52 tree_while_command (int l = -1, int c = -1) |
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53 : tree_command (l, c), expr (0), list (0), lead_comm (0), |
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54 trail_comm (0) { } |
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55 |
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56 tree_while_command (tree_expression *e, |
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57 octave_comment_list *lc = 0, |
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58 octave_comment_list *tc = 0, |
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59 int l = -1, int c = -1) |
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60 : tree_command (l, c), expr (e), list (0), lead_comm (lc), |
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61 trail_comm (tc) { } |
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62 |
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63 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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64 octave_comment_list *lc = 0, |
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65 octave_comment_list *tc = 0, |
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66 int l = -1, int c = -1) |
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67 : tree_command (l, c), expr (e), list (lst), lead_comm (lc), |
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68 trail_comm (tc) { } |
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69 |
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70 ~tree_while_command (void); |
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71 |
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72 void eval (void); |
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73 |
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74 void eval_error (void); |
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75 |
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76 tree_expression *condition (void) { return expr; } |
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77 |
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78 tree_statement_list *body (void) { return list; } |
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79 |
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80 octave_comment_list *leading_comment (void) { return lead_comm; } |
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81 |
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82 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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83 |
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84 void accept (tree_walker& tw); |
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85 |
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86 protected: |
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87 |
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88 // Expression to test. |
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89 tree_expression *expr; |
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90 |
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91 // List of commands to execute. |
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92 tree_statement_list *list; |
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93 |
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94 // Comment preceding WHILE token. |
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95 octave_comment_list *lead_comm; |
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96 |
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97 // Comment preceding ENDWHILE token. |
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98 octave_comment_list *trail_comm; |
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99 |
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100 private: |
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101 |
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102 // No copying! |
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103 |
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104 tree_while_command (const tree_while_command&); |
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105 |
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106 tree_while_command& operator = (const tree_while_command&); |
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107 }; |
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108 |
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109 // Do-Until. |
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110 |
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111 class |
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112 tree_do_until_command : public tree_while_command |
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113 { |
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114 public: |
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115 |
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116 tree_do_until_command (int l = -1, int c = -1) |
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117 : tree_while_command (l, c) { } |
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118 |
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119 tree_do_until_command (tree_expression *e, |
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120 octave_comment_list *lc = 0, |
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121 octave_comment_list *tc = 0, |
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122 int l = -1, int c = -1) |
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123 : tree_while_command (e, lc, tc, l, c) { } |
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124 |
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125 tree_do_until_command (tree_expression *e, tree_statement_list *lst, |
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126 octave_comment_list *lc = 0, |
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127 octave_comment_list *tc = 0, |
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128 int l = -1, int c = -1) |
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129 : tree_while_command (e, lst, lc, tc, l, c) { } |
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130 |
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131 ~tree_do_until_command (void) { } |
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132 |
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133 void eval (void); |
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134 |
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135 void eval_error (void); |
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136 |
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137 void accept (tree_walker& tw); |
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138 |
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139 private: |
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140 |
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141 // No copying! |
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142 |
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143 tree_do_until_command (const tree_do_until_command&); |
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144 |
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145 tree_do_until_command& operator = (const tree_do_until_command&); |
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146 }; |
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147 |
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148 // For. |
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149 |
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150 class |
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151 tree_simple_for_command : public tree_command |
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152 { |
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153 public: |
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154 |
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155 tree_simple_for_command (int l = -1, int c = -1) |
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156 : tree_command (l, c), lhs (0), expr (0), list (0), lead_comm (0), |
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157 trail_comm (0) { } |
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158 |
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159 tree_simple_for_command (tree_expression *le, tree_expression *re, |
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160 tree_statement_list *lst, |
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161 octave_comment_list *lc = 0, |
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162 octave_comment_list *tc = 0, |
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163 int l = -1, int c = -1) |
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164 : tree_command (l, c), lhs (le), expr (re), list (lst), |
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165 lead_comm (lc), trail_comm (tc) { } |
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166 |
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167 ~tree_simple_for_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 *left_hand_side (void) { return lhs; } |
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174 |
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175 tree_expression *control_expr (void) { return expr; } |
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176 |
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177 tree_statement_list *body (void) { return list; } |
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178 |
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179 octave_comment_list *leading_comment (void) { return lead_comm; } |
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180 |
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181 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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182 |
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183 void accept (tree_walker& tw); |
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184 |
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185 private: |
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186 |
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187 // Expression to modify. |
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188 tree_expression *lhs; |
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189 |
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190 // Expression to evaluate. |
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191 tree_expression *expr; |
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192 |
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193 // List of commands to execute. |
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194 tree_statement_list *list; |
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195 |
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196 // Comment preceding FOR token. |
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197 octave_comment_list *lead_comm; |
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198 |
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199 // Comment preceding ENDFOR token. |
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200 octave_comment_list *trail_comm; |
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201 |
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202 void do_for_loop_once (octave_lvalue &ult, const octave_value& rhs, |
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203 bool& quit); |
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204 |
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205 // No copying! |
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206 |
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207 tree_simple_for_command (const tree_simple_for_command&); |
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208 |
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209 tree_simple_for_command& operator = (const tree_simple_for_command&); |
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210 }; |
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211 |
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212 class |
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213 tree_complex_for_command : public tree_command |
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214 { |
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215 public: |
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216 |
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217 tree_complex_for_command (int l = -1, int c = -1) |
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218 : tree_command (l, c), lhs (0), expr (0), list (0), lead_comm (0), |
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219 trail_comm (0) { } |
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220 |
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221 tree_complex_for_command (tree_argument_list *le, tree_expression *re, |
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222 tree_statement_list *lst, |
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223 octave_comment_list *lc = 0, |
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224 octave_comment_list *tc = 0, |
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225 int l = -1, int c = -1) |
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226 : tree_command (l, c), lhs (le), expr (re), list (lst), |
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227 lead_comm (lc), trail_comm (tc) { } |
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228 |
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229 ~tree_complex_for_command (void); |
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230 |
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231 void eval (void); |
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232 |
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233 void eval_error (void); |
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234 |
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235 tree_argument_list *left_hand_side (void) { return lhs; } |
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236 |
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237 tree_expression *control_expr (void) { return expr; } |
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238 |
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239 tree_statement_list *body (void) { return list; } |
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240 |
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241 octave_comment_list *leading_comment (void) { return lead_comm; } |
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242 |
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243 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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244 |
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245 void accept (tree_walker& tw); |
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246 |
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247 private: |
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248 |
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249 // Expression to modify. |
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250 tree_argument_list *lhs; |
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251 |
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252 // Expression to evaluate. |
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253 tree_expression *expr; |
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254 |
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255 // List of commands to execute. |
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256 tree_statement_list *list; |
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257 |
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258 // Comment preceding FOR token. |
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259 octave_comment_list *lead_comm; |
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260 |
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261 // Comment preceding ENDFOR token. |
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262 octave_comment_list *trail_comm; |
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263 |
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264 void do_for_loop_once (octave_lvalue &val_ref, octave_lvalue &key_ref, |
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265 const octave_value& val, const octave_value& key, |
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266 bool& quit); |
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267 |
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268 // No copying! |
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269 |
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270 tree_complex_for_command (const tree_complex_for_command&); |
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271 |
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272 tree_complex_for_command& operator = (const tree_complex_for_command&); |
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273 }; |
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274 |
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275 #endif |
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276 |
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277 /* |
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278 ;;; Local Variables: *** |
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279 ;;; mode: C++ *** |
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280 ;;; End: *** |
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281 */ |
