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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 (__GNUG__) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include <SLList.h> |
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32 |
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33 #include "error.h" |
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34 #include "ov.h" |
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35 #include "oct-lvalue.h" |
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36 #include "pt-id.h" |
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37 #include "pt-idx.h" |
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38 #include "pt-misc.h" |
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39 #include "pt-walk.h" |
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40 |
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41 // Parameter lists. |
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42 |
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43 tree_parameter_list::~tree_parameter_list (void) |
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44 { |
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45 while (! empty ()) |
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46 { |
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47 tree_identifier *t = remove_front (); |
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48 delete t; |
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49 } |
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50 } |
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51 |
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52 void |
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53 tree_parameter_list::mark_as_formal_parameters (void) |
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54 { |
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55 for (Pix p = first (); p != 0; next (p)) |
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56 { |
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57 tree_identifier *elt = this->operator () (p); |
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58 elt->mark_as_formal_parameter (); |
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59 } |
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60 } |
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61 |
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62 void |
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63 tree_parameter_list::initialize_undefined_elements (octave_value& val) |
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64 { |
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65 for (Pix p = first (); p != 0; next (p)) |
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66 { |
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67 tree_identifier *elt = this->operator () (p); |
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68 |
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69 if (! elt->is_defined ()) |
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70 { |
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71 octave_lvalue tmp = elt->lvalue (); |
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72 |
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73 tmp.assign (octave_value::asn_eq, val); |
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74 } |
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75 } |
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76 } |
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77 |
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78 void |
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79 tree_parameter_list::define_from_arg_vector (const octave_value_list& args) |
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80 { |
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81 int nargin = args.length (); |
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82 |
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83 if (nargin <= 0) |
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84 return; |
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85 |
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86 int expected_nargin = length (); |
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87 |
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88 Pix p = first (); |
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89 |
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90 for (int i = 0; i < expected_nargin; i++) |
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91 { |
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92 tree_identifier *elt = this->operator () (p); |
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93 |
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94 octave_lvalue ref = elt->lvalue (); |
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95 |
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96 if (i < nargin) |
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97 { |
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98 if (args(i).is_defined () && args(i).is_magic_colon ()) |
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99 { |
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100 ::error ("invalid use of colon in function argument list"); |
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101 return; |
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102 } |
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103 |
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104 ref.assign (octave_value::asn_eq, args(i)); |
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105 } |
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106 else |
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107 ref.assign (octave_value::asn_eq, octave_value ()); |
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108 |
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109 next (p); |
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110 } |
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111 } |
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112 |
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113 void |
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114 tree_parameter_list::clear (void) |
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115 { |
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116 int len = length (); |
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117 |
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118 Pix p = first (); |
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119 |
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120 for (int i = 0; i < len; i++) |
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121 { |
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122 tree_identifier *elt = this->operator () (p); |
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123 |
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124 octave_lvalue ref = elt->lvalue (); |
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125 |
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126 ref.assign (octave_value::asn_eq, octave_value ()); |
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127 |
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128 next (p); |
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129 } |
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130 } |
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131 |
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132 octave_value_list |
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133 tree_parameter_list::convert_to_const_vector (tree_va_return_list *vr_list) |
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134 { |
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135 int nout = length (); |
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136 |
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137 if (vr_list) |
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138 nout += vr_list->length (); |
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139 |
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140 octave_value_list retval; |
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141 retval.resize (nout); |
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142 |
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143 int i = 0; |
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144 |
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145 for (Pix p = first (); p != 0; next (p)) |
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146 { |
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147 tree_identifier *elt = this->operator () (p); |
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148 |
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149 if (elt->is_defined ()) |
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150 retval(i) = elt->rvalue (); |
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151 |
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152 i++; |
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153 } |
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154 |
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155 if (vr_list) |
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156 { |
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157 for (Pix p = vr_list->first (); p != 0; vr_list->next (p)) |
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158 { |
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159 retval(i) = vr_list->operator () (p); |
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160 i++; |
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161 } |
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162 } |
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163 |
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164 return retval; |
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165 } |
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166 |
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167 bool |
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168 tree_parameter_list::is_defined (void) |
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169 { |
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170 bool status = true; |
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171 |
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172 for (Pix p = first (); p != 0; next (p)) |
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173 { |
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174 tree_identifier *elt = this->operator () (p); |
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175 |
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176 if (! elt->is_defined ()) |
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177 { |
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178 status = false; |
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179 break; |
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180 } |
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181 } |
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182 |
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183 return status; |
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184 } |
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185 |
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186 void |
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187 tree_parameter_list::accept (tree_walker& tw) |
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188 { |
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189 tw.visit_parameter_list (*this); |
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190 } |
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191 |
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192 // Return lists. |
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193 |
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194 tree_return_list::~tree_return_list (void) |
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195 { |
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196 while (! empty ()) |
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197 { |
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198 tree_index_expression *t = remove_front (); |
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199 delete t; |
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200 } |
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201 } |
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202 |
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203 void |
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204 tree_return_list::accept (tree_walker& tw) |
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205 { |
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206 tw.visit_return_list (*this); |
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207 } |
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208 |
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209 /* |
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210 ;;; Local Variables: *** |
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211 ;;; mode: C++ *** |
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212 ;;; End: *** |
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213 */ |
