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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2002, 2004, 2005, 2006, 2007 |
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4 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 3 of the License, or (at your |
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11 option) any 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, see |
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20 <http://www.gnu.org/licenses/>. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_loop_h) |
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25 #define octave_tree_loop_h 1 |
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26 |
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27 class octave_value; |
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28 class octave_lvalue; |
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29 |
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30 class tree_argument_list; |
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31 class tree_expression; |
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32 class tree_statement_list; |
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33 |
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34 class tree_walker; |
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35 |
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36 #include "comment-list.h" |
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37 #include "pt-cmd.h" |
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38 #include "symtab.h" |
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39 |
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40 // TRUE means we are evaluating some kind of looping construct. |
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41 extern bool evaluating_looping_command; |
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42 |
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43 // While. |
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44 |
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45 class |
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46 tree_while_command : public tree_command |
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47 { |
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48 public: |
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49 |
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50 tree_while_command (int l = -1, int c = -1) |
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51 : tree_command (l, c), expr (0), list (0), lead_comm (0), |
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52 trail_comm (0) { } |
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53 |
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54 tree_while_command (tree_expression *e, |
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55 octave_comment_list *lc = 0, |
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56 octave_comment_list *tc = 0, |
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57 int l = -1, int c = -1) |
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58 : tree_command (l, c), expr (e), list (0), lead_comm (lc), |
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59 trail_comm (tc) { } |
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60 |
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61 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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62 octave_comment_list *lc = 0, |
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63 octave_comment_list *tc = 0, |
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64 int l = -1, int c = -1) |
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65 : tree_command (l, c), expr (e), list (lst), lead_comm (lc), |
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66 trail_comm (tc) { } |
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67 |
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68 ~tree_while_command (void); |
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69 |
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70 void eval (void); |
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71 |
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72 void eval_error (void); |
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73 |
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74 tree_expression *condition (void) { return expr; } |
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75 |
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76 tree_statement_list *body (void) { return list; } |
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77 |
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78 octave_comment_list *leading_comment (void) { return lead_comm; } |
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79 |
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80 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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81 |
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82 tree_command *dup (symbol_table::scope_id scope); |
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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 tree_command *dup (symbol_table::scope_id scope); |
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138 |
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139 void accept (tree_walker& tw); |
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140 |
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141 private: |
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142 |
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143 // No copying! |
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144 |
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145 tree_do_until_command (const tree_do_until_command&); |
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146 |
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147 tree_do_until_command& operator = (const tree_do_until_command&); |
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148 }; |
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149 |
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150 // For. |
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151 |
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152 class |
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153 tree_simple_for_command : public tree_command |
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154 { |
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155 public: |
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156 |
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157 tree_simple_for_command (int l = -1, int c = -1) |
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158 : tree_command (l, c), lhs (0), expr (0), list (0), lead_comm (0), |
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159 trail_comm (0) { } |
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160 |
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161 tree_simple_for_command (tree_expression *le, tree_expression *re, |
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162 tree_statement_list *lst, |
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163 octave_comment_list *lc = 0, |
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164 octave_comment_list *tc = 0, |
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165 int l = -1, int c = -1) |
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166 : tree_command (l, c), lhs (le), expr (re), list (lst), |
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167 lead_comm (lc), trail_comm (tc) { } |
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168 |
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169 ~tree_simple_for_command (void); |
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170 |
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171 void eval (void); |
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172 |
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173 void eval_error (void); |
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174 |
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175 tree_expression *left_hand_side (void) { return lhs; } |
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176 |
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177 tree_expression *control_expr (void) { return expr; } |
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178 |
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179 tree_statement_list *body (void) { return list; } |
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180 |
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181 octave_comment_list *leading_comment (void) { return lead_comm; } |
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182 |
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183 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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184 |
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185 tree_command *dup (symbol_table::scope_id scope); |
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186 |
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187 void accept (tree_walker& tw); |
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188 |
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189 private: |
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190 |
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191 // Expression to modify. |
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192 tree_expression *lhs; |
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193 |
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194 // Expression to evaluate. |
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195 tree_expression *expr; |
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196 |
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197 // List of commands to execute. |
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198 tree_statement_list *list; |
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199 |
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200 // Comment preceding FOR token. |
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201 octave_comment_list *lead_comm; |
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202 |
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203 // Comment preceding ENDFOR token. |
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204 octave_comment_list *trail_comm; |
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205 |
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206 void do_for_loop_once (octave_lvalue &ult, const octave_value& rhs, |
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207 bool& quit); |
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208 |
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209 // No copying! |
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210 |
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211 tree_simple_for_command (const tree_simple_for_command&); |
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212 |
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213 tree_simple_for_command& operator = (const tree_simple_for_command&); |
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214 }; |
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215 |
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216 class |
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217 tree_complex_for_command : public tree_command |
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218 { |
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219 public: |
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220 |
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221 tree_complex_for_command (int l = -1, int c = -1) |
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222 : tree_command (l, c), lhs (0), expr (0), list (0), lead_comm (0), |
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223 trail_comm (0) { } |
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224 |
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225 tree_complex_for_command (tree_argument_list *le, tree_expression *re, |
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226 tree_statement_list *lst, |
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227 octave_comment_list *lc = 0, |
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228 octave_comment_list *tc = 0, |
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229 int l = -1, int c = -1) |
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230 : tree_command (l, c), lhs (le), expr (re), list (lst), |
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231 lead_comm (lc), trail_comm (tc) { } |
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232 |
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233 ~tree_complex_for_command (void); |
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234 |
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235 void eval (void); |
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236 |
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237 void eval_error (void); |
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238 |
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239 tree_argument_list *left_hand_side (void) { return lhs; } |
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240 |
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241 tree_expression *control_expr (void) { return expr; } |
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242 |
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243 tree_statement_list *body (void) { return list; } |
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244 |
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245 octave_comment_list *leading_comment (void) { return lead_comm; } |
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246 |
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247 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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248 |
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249 tree_command *dup (symbol_table::scope_id scope); |
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250 |
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251 void accept (tree_walker& tw); |
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252 |
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253 private: |
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254 |
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255 // Expression to modify. |
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256 tree_argument_list *lhs; |
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257 |
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258 // Expression to evaluate. |
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259 tree_expression *expr; |
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260 |
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261 // List of commands to execute. |
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262 tree_statement_list *list; |
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263 |
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264 // Comment preceding FOR token. |
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265 octave_comment_list *lead_comm; |
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266 |
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267 // Comment preceding ENDFOR token. |
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268 octave_comment_list *trail_comm; |
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269 |
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270 void do_for_loop_once (octave_lvalue &val_ref, octave_lvalue &key_ref, |
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271 const octave_value& val, const octave_value& key, |
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272 bool& quit); |
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273 |
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274 // No copying! |
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275 |
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276 tree_complex_for_command (const tree_complex_for_command&); |
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277 |
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278 tree_complex_for_command& operator = (const tree_complex_for_command&); |
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279 }; |
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280 |
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281 #endif |
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282 |
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283 /* |
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284 ;;; Local Variables: *** |
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285 ;;; mode: C++ *** |
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286 ;;; End: *** |
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287 */ |
