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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, 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_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 |
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39 // TRUE means we are evaluating some kind of looping construct. |
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40 extern bool evaluating_looping_command; |
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41 |
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42 // While. |
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43 |
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44 class |
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45 tree_while_command : public tree_command |
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46 { |
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47 public: |
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48 |
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49 tree_while_command (int l = -1, int c = -1) |
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50 : tree_command (l, c), expr (0), list (0), lead_comm (0), |
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51 trail_comm (0) { } |
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52 |
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53 tree_while_command (tree_expression *e, |
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54 octave_comment_list *lc = 0, |
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55 octave_comment_list *tc = 0, |
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56 int l = -1, int c = -1) |
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57 : tree_command (l, c), expr (e), list (0), lead_comm (lc), |
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58 trail_comm (tc) { } |
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59 |
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60 tree_while_command (tree_expression *e, tree_statement_list *lst, |
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61 octave_comment_list *lc = 0, |
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62 octave_comment_list *tc = 0, |
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63 int l = -1, int c = -1) |
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64 : tree_command (l, c), expr (e), list (lst), lead_comm (lc), |
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65 trail_comm (tc) { } |
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66 |
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67 ~tree_while_command (void); |
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68 |
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69 void eval (void); |
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70 |
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71 void eval_error (void); |
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72 |
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73 tree_expression *condition (void) { return expr; } |
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74 |
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75 tree_statement_list *body (void) { return list; } |
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76 |
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77 octave_comment_list *leading_comment (void) { return lead_comm; } |
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78 |
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79 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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80 |
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81 tree_command *dup (symbol_table *sym_tab); |
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82 |
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83 void accept (tree_walker& tw); |
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84 |
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85 protected: |
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86 |
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87 // Expression to test. |
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88 tree_expression *expr; |
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89 |
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90 // List of commands to execute. |
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91 tree_statement_list *list; |
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92 |
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93 // Comment preceding WHILE token. |
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94 octave_comment_list *lead_comm; |
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95 |
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96 // Comment preceding ENDWHILE token. |
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97 octave_comment_list *trail_comm; |
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98 |
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99 private: |
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100 |
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101 // No copying! |
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102 |
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103 tree_while_command (const tree_while_command&); |
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104 |
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105 tree_while_command& operator = (const tree_while_command&); |
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106 }; |
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107 |
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108 // Do-Until. |
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109 |
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110 class |
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111 tree_do_until_command : public tree_while_command |
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112 { |
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113 public: |
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114 |
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115 tree_do_until_command (int l = -1, int c = -1) |
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116 : tree_while_command (l, c) { } |
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117 |
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118 tree_do_until_command (tree_expression *e, |
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119 octave_comment_list *lc = 0, |
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120 octave_comment_list *tc = 0, |
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121 int l = -1, int c = -1) |
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122 : tree_while_command (e, lc, tc, l, c) { } |
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123 |
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124 tree_do_until_command (tree_expression *e, tree_statement_list *lst, |
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125 octave_comment_list *lc = 0, |
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126 octave_comment_list *tc = 0, |
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127 int l = -1, int c = -1) |
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128 : tree_while_command (e, lst, lc, tc, l, c) { } |
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129 |
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130 ~tree_do_until_command (void) { } |
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131 |
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132 void eval (void); |
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133 |
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134 void eval_error (void); |
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135 |
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136 tree_command *dup (symbol_table *sym_tab); |
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137 |
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138 void accept (tree_walker& tw); |
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139 |
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140 private: |
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141 |
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142 // No copying! |
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143 |
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144 tree_do_until_command (const tree_do_until_command&); |
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145 |
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146 tree_do_until_command& operator = (const tree_do_until_command&); |
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147 }; |
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148 |
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149 // For. |
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150 |
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151 class |
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152 tree_simple_for_command : public tree_command |
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153 { |
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154 public: |
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155 |
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156 tree_simple_for_command (int l = -1, int c = -1) |
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157 : tree_command (l, c), lhs (0), expr (0), list (0), lead_comm (0), |
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158 trail_comm (0) { } |
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159 |
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160 tree_simple_for_command (tree_expression *le, tree_expression *re, |
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161 tree_statement_list *lst, |
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162 octave_comment_list *lc = 0, |
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163 octave_comment_list *tc = 0, |
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164 int l = -1, int c = -1) |
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165 : tree_command (l, c), lhs (le), expr (re), list (lst), |
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166 lead_comm (lc), trail_comm (tc) { } |
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167 |
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168 ~tree_simple_for_command (void); |
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169 |
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170 void eval (void); |
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171 |
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172 void eval_error (void); |
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173 |
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174 tree_expression *left_hand_side (void) { return lhs; } |
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175 |
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176 tree_expression *control_expr (void) { return expr; } |
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177 |
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178 tree_statement_list *body (void) { return list; } |
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179 |
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180 octave_comment_list *leading_comment (void) { return lead_comm; } |
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181 |
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182 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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183 |
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184 tree_command *dup (symbol_table *sym_tab); |
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185 |
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186 void accept (tree_walker& tw); |
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187 |
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188 private: |
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189 |
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190 // Expression to modify. |
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191 tree_expression *lhs; |
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192 |
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193 // Expression to evaluate. |
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194 tree_expression *expr; |
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195 |
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196 // List of commands to execute. |
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197 tree_statement_list *list; |
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198 |
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199 // Comment preceding FOR token. |
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200 octave_comment_list *lead_comm; |
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201 |
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202 // Comment preceding ENDFOR token. |
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203 octave_comment_list *trail_comm; |
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204 |
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205 void do_for_loop_once (octave_lvalue &ult, const octave_value& rhs, |
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206 bool& quit); |
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207 |
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208 // No copying! |
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209 |
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210 tree_simple_for_command (const tree_simple_for_command&); |
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211 |
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212 tree_simple_for_command& operator = (const tree_simple_for_command&); |
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213 }; |
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214 |
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215 class |
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216 tree_complex_for_command : public tree_command |
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217 { |
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218 public: |
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219 |
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220 tree_complex_for_command (int l = -1, int c = -1) |
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221 : tree_command (l, c), lhs (0), expr (0), list (0), lead_comm (0), |
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222 trail_comm (0) { } |
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223 |
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224 tree_complex_for_command (tree_argument_list *le, tree_expression *re, |
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225 tree_statement_list *lst, |
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226 octave_comment_list *lc = 0, |
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227 octave_comment_list *tc = 0, |
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228 int l = -1, int c = -1) |
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229 : tree_command (l, c), lhs (le), expr (re), list (lst), |
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230 lead_comm (lc), trail_comm (tc) { } |
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231 |
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232 ~tree_complex_for_command (void); |
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233 |
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234 void eval (void); |
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235 |
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236 void eval_error (void); |
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237 |
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238 tree_argument_list *left_hand_side (void) { return lhs; } |
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239 |
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240 tree_expression *control_expr (void) { return expr; } |
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241 |
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242 tree_statement_list *body (void) { return list; } |
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243 |
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244 octave_comment_list *leading_comment (void) { return lead_comm; } |
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245 |
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246 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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247 |
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248 tree_command *dup (symbol_table *sym_tab); |
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249 |
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250 void accept (tree_walker& tw); |
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251 |
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252 private: |
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253 |
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254 // Expression to modify. |
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255 tree_argument_list *lhs; |
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256 |
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257 // Expression to evaluate. |
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258 tree_expression *expr; |
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259 |
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260 // List of commands to execute. |
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261 tree_statement_list *list; |
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262 |
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263 // Comment preceding FOR token. |
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264 octave_comment_list *lead_comm; |
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265 |
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266 // Comment preceding ENDFOR token. |
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267 octave_comment_list *trail_comm; |
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268 |
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269 void do_for_loop_once (octave_lvalue &val_ref, octave_lvalue &key_ref, |
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270 const octave_value& val, const octave_value& key, |
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271 bool& quit); |
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272 |
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273 // No copying! |
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274 |
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275 tree_complex_for_command (const tree_complex_for_command&); |
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276 |
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277 tree_complex_for_command& operator = (const tree_complex_for_command&); |
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278 }; |
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279 |
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280 #endif |
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281 |
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282 /* |
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283 ;;; Local Variables: *** |
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284 ;;; mode: C++ *** |
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285 ;;; End: *** |
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286 */ |
