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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_select_h) |
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25 #define octave_tree_select_h 1 |
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26 |
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27 class expression; |
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28 class tree_statement_list; |
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29 |
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30 class tree_walker; |
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31 |
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32 #include "base-list.h" |
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33 #include "comment-list.h" |
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34 #include "pt-cmd.h" |
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35 |
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36 // If. |
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37 |
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38 class |
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39 tree_if_clause |
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40 { |
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41 public: |
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42 |
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43 tree_if_clause (void) |
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44 : expr (0), list (0), lead_comm (0) { } |
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45 |
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46 tree_if_clause (tree_statement_list *l, octave_comment_list *lc = 0) |
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47 : expr (0), list (l), lead_comm (lc) { } |
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48 |
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49 tree_if_clause (tree_expression *e, tree_statement_list *l, |
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50 octave_comment_list *lc = 0) |
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51 : expr (e), list (l), lead_comm (lc) { } |
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52 |
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53 ~tree_if_clause (void); |
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54 |
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55 bool is_else_clause (void) |
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56 { return ! expr; } |
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57 |
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58 int eval (void); |
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59 |
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60 tree_expression *condition (void) { return expr; } |
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61 |
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62 tree_statement_list *commands (void) { return list; } |
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63 |
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64 octave_comment_list *leading_comment (void) { return lead_comm; } |
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65 |
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66 void accept (tree_walker& tw); |
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67 |
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68 private: |
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69 |
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70 // The condition to test. |
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71 tree_expression *expr; |
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72 |
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73 // The list of statements to evaluate if expr is true. |
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74 tree_statement_list *list; |
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75 |
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76 // Comment preceding ELSE or ELSEIF token. |
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77 octave_comment_list *lead_comm; |
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78 |
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79 // No copying! |
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80 |
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81 tree_if_clause (const tree_if_clause&); |
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82 |
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83 tree_if_clause& operator = (const tree_if_clause&); |
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84 }; |
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85 |
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86 class |
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87 tree_if_command_list : public octave_base_list<tree_if_clause *> |
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88 { |
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89 public: |
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90 |
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91 tree_if_command_list (void) { } |
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92 |
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93 tree_if_command_list (tree_if_clause *t) { append (t); } |
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94 |
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95 ~tree_if_command_list (void) |
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96 { |
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97 while (! empty ()) |
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98 { |
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99 iterator p = begin (); |
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100 delete *p; |
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101 erase (p); |
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102 } |
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103 } |
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104 |
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105 void eval (void); |
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106 |
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107 void accept (tree_walker& tw); |
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108 |
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109 private: |
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110 |
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111 // No copying! |
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112 |
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113 tree_if_command_list (const tree_if_command_list&); |
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114 |
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115 tree_if_command_list& operator = (const tree_if_command_list&); |
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116 }; |
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117 |
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118 class |
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119 tree_if_command : public tree_command |
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120 { |
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121 public: |
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122 |
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123 tree_if_command (int l = -1, int c = -1) |
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124 : tree_command (l, c), list (0), lead_comm (0), trail_comm (0) { } |
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125 |
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126 tree_if_command (tree_if_command_list *lst, octave_comment_list *lc, |
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127 octave_comment_list *tc, int l = -1, int c = -1) |
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128 : tree_command (l, c), list (lst), lead_comm (lc), trail_comm (tc) { } |
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129 |
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130 ~tree_if_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 tree_if_command_list *cmd_list (void) { return list; } |
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135 |
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136 octave_comment_list *leading_comment (void) { return lead_comm; } |
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137 |
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138 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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139 |
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140 void accept (tree_walker& tw); |
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141 |
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142 private: |
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143 |
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144 // List of if commands (if, elseif, elseif, ... else, endif) |
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145 tree_if_command_list *list; |
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146 |
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147 // Comment preceding IF token. |
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148 octave_comment_list *lead_comm; |
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149 |
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150 // Comment preceding ENDIF token. |
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151 octave_comment_list *trail_comm; |
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152 |
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153 // No copying! |
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154 |
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155 tree_if_command (const tree_if_command&); |
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156 |
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157 tree_if_command& operator = (const tree_if_command&); |
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158 }; |
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159 |
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160 // Switch. |
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161 |
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162 class |
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163 tree_switch_case |
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164 { |
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165 public: |
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166 |
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167 tree_switch_case (void) |
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168 : label (0), list (0), lead_comm (0) { } |
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169 |
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170 tree_switch_case (tree_statement_list *l, octave_comment_list *lc = 0) |
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171 : label (0), list (l), lead_comm (lc) { } |
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172 |
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173 tree_switch_case (tree_expression *e, tree_statement_list *l, |
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174 octave_comment_list *lc = 0) |
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175 : label (e), list (l), lead_comm (lc) { } |
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176 |
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177 ~tree_switch_case (void); |
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178 |
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179 bool is_default_case (void) { return ! label; } |
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180 |
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181 bool label_matches (const octave_value& val); |
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182 |
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183 int eval (const octave_value& val); |
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184 |
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185 void eval_error (void); |
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186 |
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187 tree_expression *case_label (void) { return label; } |
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188 |
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189 tree_statement_list *commands (void) { return list; } |
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190 |
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191 octave_comment_list *leading_comment (void) { return lead_comm; } |
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192 |
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193 void accept (tree_walker& tw); |
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194 |
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195 private: |
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196 |
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197 // The case label. |
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198 tree_expression *label; |
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199 |
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200 // The list of statements to evaluate if the label matches. |
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201 tree_statement_list *list; |
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202 |
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203 // Comment preceding CASE or OTHERWISE token. |
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204 octave_comment_list *lead_comm; |
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205 |
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206 // No copying! |
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207 |
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208 tree_switch_case (const tree_switch_case&); |
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209 |
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210 tree_switch_case& operator = (const tree_switch_case&); |
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211 }; |
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212 |
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213 class |
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214 tree_switch_case_list : public octave_base_list<tree_switch_case *> |
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215 { |
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216 public: |
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217 |
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218 tree_switch_case_list (void) { } |
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219 |
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220 tree_switch_case_list (tree_switch_case *t) { append (t); } |
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221 |
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222 ~tree_switch_case_list (void) |
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223 { |
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224 while (! empty ()) |
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225 { |
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226 iterator p = begin (); |
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227 delete *p; |
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228 erase (p); |
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229 } |
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230 } |
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231 |
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232 void eval (const octave_value& val); |
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233 |
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234 void accept (tree_walker& tw); |
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235 |
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236 private: |
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237 |
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238 // No copying! |
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239 |
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240 tree_switch_case_list (const tree_switch_case_list&); |
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241 |
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242 tree_switch_case_list& operator = (const tree_switch_case_list&); |
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243 }; |
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244 |
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245 class |
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246 tree_switch_command : public tree_command |
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247 { |
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248 public: |
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249 |
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250 tree_switch_command (int l = -1, int c = -1) |
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251 : tree_command (l, c), expr (0), list (0), lead_comm (0), |
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252 trail_comm (0) { } |
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253 |
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254 tree_switch_command (tree_expression *e, tree_switch_case_list *lst, |
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255 octave_comment_list *lc, octave_comment_list *tc, |
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256 int l = -1, int c = -1) |
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257 : tree_command (l, c), expr (e), list (lst), lead_comm (lc), |
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258 trail_comm (tc) { } |
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259 |
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260 ~tree_switch_command (void); |
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261 |
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262 void eval (void); |
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263 |
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264 void eval_error (void); |
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265 |
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266 tree_expression *switch_value (void) { return expr; } |
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267 |
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268 tree_switch_case_list *case_list (void) { return list; } |
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269 |
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270 octave_comment_list *leading_comment (void) { return lead_comm; } |
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271 |
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272 octave_comment_list *trailing_comment (void) { return trail_comm; } |
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273 |
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274 void accept (tree_walker& tw); |
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275 |
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276 private: |
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277 |
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278 // Value on which to switch. |
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279 tree_expression *expr; |
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280 |
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281 // List of cases (case 1, case 2, ..., default) |
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282 tree_switch_case_list *list; |
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283 |
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284 // Comment preceding SWITCH token. |
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285 octave_comment_list *lead_comm; |
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286 |
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287 // Comment preceding ENDSWITCH token. |
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288 octave_comment_list *trail_comm; |
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289 |
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290 // No copying! |
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291 |
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292 tree_switch_command (const tree_switch_command&); |
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293 |
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294 tree_switch_command& operator = (const tree_switch_command&); |
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295 }; |
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296 |
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297 #endif |
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298 |
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299 /* |
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300 ;;; Local Variables: *** |
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301 ;;; mode: C++ *** |
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302 ;;; End: *** |
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303 */ |
