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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 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include "defun.h" |
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29 #include "error.h" |
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30 #include "ov.h" |
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31 #include "oct-lvalue.h" |
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32 #include "pt-id.h" |
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33 #include "pt-idx.h" |
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34 #include "pt-misc.h" |
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35 #include "pt-walk.h" |
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36 #include "utils.h" |
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37 |
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38 // Parameter lists. |
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39 |
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40 tree_parameter_list::~tree_parameter_list (void) |
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41 { |
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42 while (! empty ()) |
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43 { |
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44 iterator p = begin (); |
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45 delete *p; |
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46 erase (p); |
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47 } |
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48 } |
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49 |
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50 void |
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51 tree_parameter_list::mark_as_formal_parameters (void) |
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52 { |
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53 for (iterator p = begin (); p != end (); p++) |
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54 { |
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55 tree_identifier *elt = *p; |
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56 elt->mark_as_formal_parameter (); |
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57 } |
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58 } |
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59 |
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60 void |
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61 tree_parameter_list::initialize_undefined_elements (const std::string& warnfor, |
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62 int nargout, |
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63 const octave_value& val) |
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64 { |
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65 bool warned = false; |
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66 |
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67 int count = 0; |
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68 |
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69 for (iterator p = begin (); p != end (); p++) |
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70 { |
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71 if (++count > nargout) |
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72 break; |
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73 |
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74 tree_identifier *elt = *p; |
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75 |
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76 if (! elt->is_defined ()) |
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77 { |
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78 if (! warned) |
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79 { |
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80 warned = true; |
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81 |
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82 warning_with_id |
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83 ("Octave:undefined-return-values", |
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84 "%s: some elements in list of return values are undefined", |
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85 warnfor.c_str ()); |
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86 } |
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87 |
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88 octave_lvalue tmp = elt->lvalue (); |
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89 |
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90 tmp.assign (octave_value::op_asn_eq, val); |
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91 } |
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92 } |
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93 } |
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94 |
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95 void |
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96 tree_parameter_list::define_from_arg_vector (const octave_value_list& args) |
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97 { |
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98 int nargin = args.length (); |
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99 |
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100 if (nargin <= 0) |
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101 return; |
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102 |
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103 int expected_nargin = length (); |
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104 |
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105 iterator p = begin (); |
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106 |
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107 for (int i = 0; i < expected_nargin; i++) |
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108 { |
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109 tree_identifier *elt = *p++; |
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110 |
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111 octave_lvalue ref = elt->lvalue (); |
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112 |
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113 if (i < nargin) |
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114 { |
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115 if (args(i).is_defined () && args(i).is_magic_colon ()) |
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116 { |
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117 ::error ("invalid use of colon in function argument list"); |
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118 return; |
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119 } |
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120 |
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121 ref.assign (octave_value::op_asn_eq, args(i)); |
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122 } |
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123 else |
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124 ref.assign (octave_value::op_asn_eq, octave_value ()); |
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125 } |
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126 } |
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127 |
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128 void |
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129 tree_parameter_list::undefine (void) |
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130 { |
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131 int len = length (); |
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132 |
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133 iterator p = begin (); |
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134 |
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135 for (int i = 0; i < len; i++) |
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136 { |
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137 tree_identifier *elt = *p++; |
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138 |
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139 octave_lvalue ref = elt->lvalue (); |
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140 |
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141 ref.assign (octave_value::op_asn_eq, octave_value ()); |
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142 } |
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143 } |
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144 |
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145 octave_value_list |
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146 tree_parameter_list::convert_to_const_vector (tree_va_return_list *vr_list) |
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147 { |
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148 int nout = length (); |
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149 |
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150 if (vr_list) |
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151 nout += vr_list->length (); |
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152 |
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153 octave_value_list retval; |
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154 retval.resize (nout); |
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155 |
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156 int i = 0; |
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157 |
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158 for (iterator p = begin (); p != end (); p++) |
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159 { |
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160 tree_identifier *elt = *p; |
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161 |
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162 retval(i++) = elt->is_defined () ? elt->rvalue () : octave_value (); |
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163 } |
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164 |
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165 if (vr_list) |
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166 { |
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167 for (tree_va_return_list::iterator p = vr_list->begin (); |
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168 p != vr_list->end (); |
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169 p++) |
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170 { |
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171 retval(i++) = *p; |
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172 } |
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173 } |
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174 |
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175 return retval; |
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176 } |
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177 |
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178 bool |
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179 tree_parameter_list::is_defined (void) |
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180 { |
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181 bool status = true; |
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182 |
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183 for (iterator p = begin (); p != end (); p++) |
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184 { |
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185 tree_identifier *elt = *p; |
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186 |
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187 if (! elt->is_defined ()) |
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188 { |
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189 status = false; |
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190 break; |
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191 } |
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192 } |
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193 |
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194 return status; |
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195 } |
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196 |
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197 void |
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198 tree_parameter_list::accept (tree_walker& tw) |
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199 { |
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200 tw.visit_parameter_list (*this); |
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201 } |
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202 |
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203 // Return lists. |
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204 |
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205 tree_return_list::~tree_return_list (void) |
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206 { |
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207 while (! empty ()) |
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208 { |
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209 iterator p = begin (); |
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210 delete *p; |
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211 erase (p); |
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212 } |
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213 } |
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214 |
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215 void |
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216 tree_return_list::accept (tree_walker& tw) |
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217 { |
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218 tw.visit_return_list (*this); |
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219 } |
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220 |
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221 /* |
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222 ;;; Local Variables: *** |
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223 ;;; mode: C++ *** |
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224 ;;; End: *** |
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225 */ |
