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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_misc_h) |
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24 #define octave_tree_misc_h 1 |
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25 |
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26 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <SLList.h> |
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31 |
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32 class octave_value; |
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33 class octave_value_list; |
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34 |
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35 class tree_identifier; |
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36 class tree_index_expression; |
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37 class tree_va_return_list; |
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38 |
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39 class tree_walker; |
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40 |
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41 // Parameter lists. Used to hold the list of input and output |
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42 // parameters in a function definition. Elements are identifiers |
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43 // only. |
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44 |
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45 class |
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46 tree_parameter_list |
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47 { |
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48 public: |
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49 |
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50 tree_parameter_list (void) |
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51 : lst (), marked_for_varargs (0) { } |
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52 |
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53 tree_parameter_list (tree_identifier *t) |
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54 : lst (), marked_for_varargs (0) { lst.append (t); } |
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55 |
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56 ~tree_parameter_list (void); |
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57 |
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58 int length (void) const { return lst.length (); } |
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59 |
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60 void append (tree_identifier *&s) { lst.append (s); } |
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61 void append (tree_identifier * const &s) { lst.append (s); } |
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62 |
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63 tree_identifier *&operator () (Pix p) { return lst (p); } |
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64 |
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65 tree_identifier * const &operator () (Pix p) const { return lst (p); } |
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66 |
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67 Pix first (void) const { return lst.first (); } |
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68 |
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69 void next (Pix& p) const { return lst.next (p); } |
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70 |
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71 void mark_as_formal_parameters (void); |
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72 |
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73 void mark_varargs (void) { marked_for_varargs = 1; } |
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74 |
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75 bool takes_varargs (void) const { return marked_for_varargs != 0; } |
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76 |
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77 void mark_varargs_only (void) { marked_for_varargs = -1; } |
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78 |
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79 bool varargs_only (void) { return (marked_for_varargs < 0); } |
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80 |
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81 void initialize_undefined_elements (octave_value& val); |
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82 |
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83 void define_from_arg_vector (const octave_value_list& args); |
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84 |
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85 void clear (void); |
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86 |
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87 bool is_defined (void); |
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88 |
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89 octave_value_list convert_to_const_vector (tree_va_return_list *vr_list); |
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90 |
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91 void accept (tree_walker& tw); |
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92 |
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93 private: |
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94 |
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95 // The list of identifiers in the parameter list. |
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96 SLList<tree_identifier *> lst; |
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97 |
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98 int marked_for_varargs; |
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99 |
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100 // No copying! |
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101 |
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102 tree_parameter_list (const tree_parameter_list&); |
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103 |
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104 tree_parameter_list& operator = (const tree_parameter_list&); |
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105 }; |
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106 |
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107 // Return lists. Used to hold the right hand sides of multiple |
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108 // assignment expressions. |
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109 |
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110 class |
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111 tree_return_list |
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112 { |
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113 public: |
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114 |
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115 tree_return_list (void) |
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116 : lst () { } |
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117 |
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118 tree_return_list (tree_index_expression *t) |
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119 : lst () { lst.append (t); } |
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120 |
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121 ~tree_return_list (void); |
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122 |
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123 void append (tree_index_expression *&s) { lst.append (s); } |
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124 void append (tree_index_expression * const &s) { lst.append (s); } |
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125 |
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126 tree_index_expression *&operator () (Pix p) { return lst (p); } |
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127 |
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128 tree_index_expression * const &operator () (Pix p) const { return lst (p); } |
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129 |
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130 Pix first (void) const { return lst.first (); } |
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131 |
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132 void next (Pix& p) const { return lst.next (p); } |
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133 |
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134 void accept (tree_walker& tw); |
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135 |
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136 private: |
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137 |
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138 // The list of expressions in the return list. |
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139 SLList<tree_index_expression *> lst; |
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140 |
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141 // No copying! |
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142 |
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143 tree_return_list (const tree_return_list&); |
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144 |
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145 tree_return_list& operator = (const tree_return_list&); |
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146 }; |
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147 |
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148 class |
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149 tree_va_return_list |
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150 { |
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151 public: |
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152 |
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153 tree_va_return_list (void) : lst () { } |
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154 |
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155 ~tree_va_return_list (void) { } |
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156 |
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157 int length (void) const { return lst.length (); } |
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158 |
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159 void clear (void) { lst.clear (); } |
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160 |
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161 int empty (void) const { return lst.empty (); } |
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162 |
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163 void append (octave_value& s) { lst.append (s); } |
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164 void append (const octave_value& s) { lst.append (s); } |
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165 |
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166 octave_value& operator () (Pix p) { return lst (p); } |
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167 |
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168 const octave_value& operator () (Pix p) const { return lst (p); } |
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169 |
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170 Pix first (void) const { return lst.first (); } |
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171 |
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172 void next (Pix& p) const { return lst.next (p); } |
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173 |
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174 private: |
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175 |
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176 // The list of values in the va return list. |
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177 SLList<octave_value> lst; |
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178 |
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179 // No copying! |
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180 |
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181 tree_va_return_list (const tree_va_return_list&); |
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182 |
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183 tree_va_return_list& operator = (const tree_va_return_list&); |
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184 }; |
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185 |
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186 #endif |
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187 |
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188 /* |
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189 ;;; Local Variables: *** |
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190 ;;; mode: C++ *** |
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191 ;;; End: *** |
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192 */ |
