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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_decl_h) |
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25 #define octave_tree_decl_h 1 |
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26 |
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27 class tree_expression; |
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28 class tree_identifier; |
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29 |
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30 class tree_walker; |
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31 |
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32 #include <string> |
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33 |
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34 #include "base-list.h" |
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35 #include "pt-cmd.h" |
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36 |
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37 // List of expressions that make up a declaration statement. |
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38 |
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39 class |
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40 tree_decl_elt |
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41 { |
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42 public: |
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43 |
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44 typedef void (*eval_fcn) (tree_decl_elt &); |
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45 |
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46 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) |
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47 : id (i), expr (e) { } |
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48 |
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49 ~tree_decl_elt (void); |
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50 |
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51 void eval (void); |
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52 |
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53 tree_identifier *ident (void) { return id; } |
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54 |
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55 tree_expression *expression (void) { return expr; } |
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56 |
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57 void accept (tree_walker& tw); |
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58 |
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59 private: |
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60 |
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61 // An identifier to tag with the declared property. |
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62 tree_identifier *id; |
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63 |
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64 // An initializer expression (may be zero); |
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65 tree_expression *expr; |
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66 |
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67 // No copying! |
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68 |
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69 tree_decl_elt (const tree_decl_elt&); |
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70 |
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71 tree_decl_elt& operator = (const tree_decl_elt&); |
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72 }; |
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73 |
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74 class |
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75 tree_decl_init_list : public octave_base_list<tree_decl_elt *> |
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76 { |
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77 public: |
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78 |
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79 tree_decl_init_list (void) { } |
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80 |
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81 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
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82 |
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83 ~tree_decl_init_list (void) |
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84 { |
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85 while (! empty ()) |
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86 { |
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87 iterator p = begin (); |
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88 delete *p; |
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89 erase (p); |
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90 } |
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91 } |
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92 |
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93 void eval (tree_decl_elt::eval_fcn); |
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94 |
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95 void accept (tree_walker& tw); |
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96 |
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97 private: |
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98 |
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99 // No copying! |
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100 |
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101 tree_decl_init_list (const tree_decl_init_list&); |
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102 |
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103 tree_decl_init_list& operator = (const tree_decl_init_list&); |
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104 }; |
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105 |
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106 // Base class for declaration commands -- global, static, etc. |
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107 |
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108 class |
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109 tree_decl_command : public tree_command |
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110 { |
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111 public: |
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112 |
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113 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
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114 : tree_command (l, c), cmd_name (n), initialized (false), init_list (0) { } |
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115 |
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116 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
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117 int l = -1, int c = -1) |
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118 : tree_command (l, c), cmd_name (n), initialized (false), init_list (t) { } |
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119 |
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120 ~tree_decl_command (void); |
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121 |
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122 tree_decl_init_list *initializer_list (void) { return init_list; } |
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123 |
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124 void accept (tree_walker& tw); |
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125 |
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126 std::string name (void) { return cmd_name; } |
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127 |
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128 protected: |
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129 |
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130 // The name of this command -- global, static, etc. |
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131 std::string cmd_name; |
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132 |
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133 // TRUE if this command has been evaluated. |
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134 bool initialized; |
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135 |
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136 // The list of variables or initializers in this declaration command. |
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137 tree_decl_init_list *init_list; |
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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_decl_command (const tree_decl_command&); |
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144 |
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145 tree_decl_command& operator = (const tree_decl_command&); |
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146 }; |
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147 |
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148 // Global. |
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149 |
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150 class |
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151 tree_global_command : public tree_decl_command |
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152 { |
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153 public: |
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154 |
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155 tree_global_command (int l = -1, int c = -1) |
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156 : tree_decl_command ("global", l, c) { } |
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157 |
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158 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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159 : tree_decl_command ("global", t, l, c) { } |
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160 |
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161 ~tree_global_command (void) { } |
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162 |
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163 void eval (void); |
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164 |
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165 private: |
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166 |
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167 static void do_init (tree_decl_elt& elt); |
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168 |
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169 // No copying! |
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170 |
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171 tree_global_command (const tree_global_command&); |
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172 |
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173 tree_global_command& operator = (const tree_global_command&); |
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174 }; |
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175 |
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176 // Static. |
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177 |
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178 class |
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179 tree_static_command : public tree_decl_command |
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180 { |
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181 public: |
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182 |
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183 tree_static_command (int l = -1, int c = -1) |
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184 : tree_decl_command ("static", l, c) { } |
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185 |
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186 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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187 : tree_decl_command ("static", t, l, c) { } |
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188 |
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189 ~tree_static_command (void) { } |
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190 |
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191 void eval (void); |
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192 |
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193 private: |
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194 |
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195 static void do_init (tree_decl_elt& elt); |
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196 |
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197 // No copying! |
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198 |
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199 tree_static_command (const tree_static_command&); |
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200 |
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201 tree_static_command& operator = (const tree_static_command&); |
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202 }; |
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203 |
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204 #endif |
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205 |
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206 /* |
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207 ;;; Local Variables: *** |
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208 ;;; mode: C++ *** |
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209 ;;; End: *** |
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210 */ |
