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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_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 "oct-lvalue.h" |
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36 #include "pt-cmd.h" |
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37 #include "pt-id.h" |
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38 #include "symtab.h" |
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39 |
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40 // List of expressions that make up a declaration statement. |
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41 |
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42 class |
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43 tree_decl_elt |
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44 { |
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45 public: |
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46 |
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47 typedef void (*eval_fcn) (tree_decl_elt &); |
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48 |
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49 tree_decl_elt (tree_identifier *i = 0, tree_expression *e = 0) |
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50 : id (i), expr (e) { } |
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51 |
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52 ~tree_decl_elt (void); |
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53 |
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54 bool eval (void); |
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55 |
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56 bool is_defined (void) { return id ? id->is_defined () : false; } |
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57 |
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58 bool is_variable (void) { return id ? id->is_variable () : false; } |
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59 |
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60 void mark_as_formal_parameter (void) |
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61 { |
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62 if (id) |
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63 id->mark_as_formal_parameter (); |
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64 } |
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65 |
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66 bool lvalue_ok (void) { return id ? id->lvalue_ok () : false; } |
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67 |
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68 octave_value rvalue (void) { return id ? id->rvalue () : octave_value (); } |
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69 |
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70 octave_value_list rvalue (int nargout) |
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71 { |
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72 return id ? id->rvalue (nargout) : octave_value_list (); |
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73 } |
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74 |
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75 octave_lvalue lvalue (void) { return id ? id->lvalue () : octave_lvalue (); } |
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76 |
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77 tree_identifier *ident (void) { return id; } |
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78 |
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79 tree_expression *expression (void) { return expr; } |
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80 |
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81 tree_decl_elt *dup (symbol_table::scope_id scope); |
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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 private: |
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86 |
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87 // An identifier to tag with the declared property. |
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88 tree_identifier *id; |
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89 |
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90 // An initializer expression (may be zero); |
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91 tree_expression *expr; |
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92 |
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93 // No copying! |
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94 |
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95 tree_decl_elt (const tree_decl_elt&); |
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96 |
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97 tree_decl_elt& operator = (const tree_decl_elt&); |
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98 }; |
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99 |
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100 class |
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101 tree_decl_init_list : public octave_base_list<tree_decl_elt *> |
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102 { |
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103 public: |
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104 |
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105 tree_decl_init_list (void) { } |
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106 |
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107 tree_decl_init_list (tree_decl_elt *t) { append (t); } |
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108 |
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109 ~tree_decl_init_list (void) |
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110 { |
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111 while (! empty ()) |
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112 { |
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113 iterator p = begin (); |
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114 delete *p; |
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115 erase (p); |
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116 } |
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117 } |
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118 |
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119 void eval (tree_decl_elt::eval_fcn); |
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120 |
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121 tree_decl_init_list *dup (symbol_table::scope_id scope); |
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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 private: |
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126 |
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127 // No copying! |
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128 |
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129 tree_decl_init_list (const tree_decl_init_list&); |
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130 |
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131 tree_decl_init_list& operator = (const tree_decl_init_list&); |
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132 }; |
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133 |
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134 // Base class for declaration commands -- global, static, etc. |
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135 |
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136 class |
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137 tree_decl_command : public tree_command |
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138 { |
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139 public: |
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140 |
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141 tree_decl_command (const std::string& n, int l = -1, int c = -1) |
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142 : tree_command (l, c), cmd_name (n), init_list (0) { } |
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143 |
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144 tree_decl_command (const std::string& n, tree_decl_init_list *t, |
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145 int l = -1, int c = -1) |
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146 : tree_command (l, c), cmd_name (n), init_list (t) { } |
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147 |
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148 ~tree_decl_command (void); |
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149 |
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150 tree_decl_init_list *initializer_list (void) { return init_list; } |
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151 |
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152 void accept (tree_walker& tw); |
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153 |
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154 std::string name (void) { return cmd_name; } |
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155 |
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156 protected: |
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157 |
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158 // The name of this command -- global, static, etc. |
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159 std::string cmd_name; |
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160 |
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161 // The list of variables or initializers in this declaration command. |
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162 tree_decl_init_list *init_list; |
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163 |
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164 private: |
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165 |
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166 // No copying! |
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167 |
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168 tree_decl_command (const tree_decl_command&); |
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169 |
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170 tree_decl_command& operator = (const tree_decl_command&); |
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171 }; |
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172 |
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173 // Global. |
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174 |
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175 class |
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176 tree_global_command : public tree_decl_command |
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177 { |
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178 public: |
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179 |
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180 tree_global_command (int l = -1, int c = -1) |
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181 : tree_decl_command ("global", l, c) { } |
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182 |
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183 tree_global_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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184 : tree_decl_command ("global", t, l, c) { } |
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185 |
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186 ~tree_global_command (void) { } |
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187 |
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188 void eval (void); |
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189 |
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190 tree_command *dup (symbol_table::scope_id scope); |
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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_global_command (const tree_global_command&); |
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199 |
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200 tree_global_command& operator = (const tree_global_command&); |
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201 }; |
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202 |
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203 // Static. |
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204 |
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205 class |
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206 tree_static_command : public tree_decl_command |
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207 { |
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208 public: |
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209 |
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210 tree_static_command (int l = -1, int c = -1) |
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211 : tree_decl_command ("static", l, c) { } |
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212 |
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213 tree_static_command (tree_decl_init_list *t, int l = -1, int c = -1) |
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214 : tree_decl_command ("static", t, l, c) { } |
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215 |
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216 ~tree_static_command (void) { } |
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217 |
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218 void eval (void); |
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219 |
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220 tree_command *dup (symbol_table::scope_id scope); |
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221 |
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222 private: |
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223 |
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224 static void do_init (tree_decl_elt& elt); |
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225 |
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226 // No copying! |
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227 |
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228 tree_static_command (const tree_static_command&); |
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229 |
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230 tree_static_command& operator = (const tree_static_command&); |
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231 }; |
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232 |
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233 #endif |
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234 |
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235 /* |
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236 ;;; Local Variables: *** |
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237 ;;; mode: C++ *** |
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238 ;;; End: *** |
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239 */ |
