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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_decl_h) |
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24 #define octave_tree_decl_h 1 |
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25 |
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26 class tree_expression; |
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27 class tree_identifier; |
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28 |
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29 class tree_walker; |
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30 |
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31 #include <string> |
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32 |
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33 #include "base-list.h" |
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34 #include "pt-cmd.h" |
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35 |
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36 // List of expressions that make up a declaration statement. |
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37 |
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38 class |
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39 tree_decl_elt |
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40 { |
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41 public: |
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42 |
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43 typedef void (*eval_fcn) (tree_decl_elt &); |
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44 |
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45 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) |
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46 : id (i), expr (e) { } |
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47 |
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48 ~tree_decl_elt (void); |
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49 |
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50 void eval (void); |
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51 |
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52 tree_identifier *ident (void) { return id; } |
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53 |
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54 tree_expression *expression (void) { return expr; } |
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55 |
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56 void accept (tree_walker& tw); |
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57 |
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58 private: |
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59 |
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60 // An identifier to tag with the declared property. |
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61 tree_identifier *id; |
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62 |
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63 // An initializer expression (may be zero); |
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64 tree_expression *expr; |
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65 |
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66 // No copying! |
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67 |
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68 tree_decl_elt (const tree_decl_elt&); |
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69 |
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70 tree_decl_elt& operator = (const tree_decl_elt&); |
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71 }; |
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72 |
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73 class |
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74 tree_decl_init_list : public octave_base_list<tree_decl_elt *> |
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75 { |
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76 public: |
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77 |
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78 tree_decl_init_list (void) { } |
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79 |
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80 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
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81 |
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82 ~tree_decl_init_list (void) |
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83 { |
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84 while (! empty ()) |
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85 { |
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86 iterator p = begin (); |
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87 delete *p; |
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88 erase (p); |
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89 } |
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90 } |
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91 |
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92 void eval (tree_decl_elt::eval_fcn); |
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93 |
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94 void accept (tree_walker& tw); |
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95 |
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96 private: |
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97 |
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98 // No copying! |
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99 |
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100 tree_decl_init_list (const tree_decl_init_list&); |
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101 |
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102 tree_decl_init_list& operator = (const tree_decl_init_list&); |
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103 }; |
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104 |
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105 // Base class for declaration commands -- global, static, etc. |
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106 |
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107 class |
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108 tree_decl_command : public tree_command |
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109 { |
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110 public: |
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111 |
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112 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
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113 : tree_command (l, c), cmd_name (n), initialized (false), init_list (0) { } |
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114 |
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115 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
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116 int l = -1, int c = -1) |
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117 : tree_command (l, c), cmd_name (n), initialized (false), init_list (t) { } |
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118 |
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119 ~tree_decl_command (void); |
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120 |
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121 tree_decl_init_list *initializer_list (void) { return init_list; } |
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122 |
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123 void accept (tree_walker& tw); |
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124 |
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125 std::string name (void) { return cmd_name; } |
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126 |
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127 protected: |
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128 |
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129 // The name of this command -- global, static, etc. |
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130 std::string cmd_name; |
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131 |
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132 // TRUE if this command has been evaluated. |
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133 bool initialized; |
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134 |
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135 // The list of variables or initializers in this declaration command. |
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136 tree_decl_init_list *init_list; |
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137 |
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138 private: |
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139 |
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140 // No copying! |
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141 |
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142 tree_decl_command (const tree_decl_command&); |
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143 |
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144 tree_decl_command& operator = (const tree_decl_command&); |
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145 }; |
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146 |
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147 // Global. |
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148 |
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149 class |
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150 tree_global_command : public tree_decl_command |
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151 { |
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152 public: |
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153 |
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154 tree_global_command (int l = -1, int c = -1) |
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155 : tree_decl_command ("global", l, c) { } |
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156 |
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157 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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158 : tree_decl_command ("global", t, l, c) { } |
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159 |
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160 ~tree_global_command (void) { } |
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161 |
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162 void eval (void); |
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163 |
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164 private: |
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165 |
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166 static void do_init (tree_decl_elt& elt); |
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167 |
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168 // No copying! |
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169 |
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170 tree_global_command (const tree_global_command&); |
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171 |
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172 tree_global_command& operator = (const tree_global_command&); |
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173 }; |
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174 |
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175 // Static. |
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176 |
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177 class |
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178 tree_static_command : public tree_decl_command |
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179 { |
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180 public: |
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181 |
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182 tree_static_command (int l = -1, int c = -1) |
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183 : tree_decl_command ("static", l, c) { } |
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184 |
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185 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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186 : tree_decl_command ("static", t, l, c) { } |
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187 |
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188 ~tree_static_command (void) { } |
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189 |
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190 void eval (void); |
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191 |
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192 private: |
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193 |
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194 static void do_init (tree_decl_elt& elt); |
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195 |
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196 // No copying! |
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197 |
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198 tree_static_command (const tree_static_command&); |
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199 |
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200 tree_static_command& operator = (const tree_static_command&); |
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201 }; |
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202 |
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203 #endif |
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204 |
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205 /* |
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206 ;;; Local Variables: *** |
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207 ;;; mode: C++ *** |
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208 ;;; End: *** |
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209 */ |
