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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 <iostream> |
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32 #include <strstream> |
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33 #include <string> |
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34 |
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35 #include "str-vec.h" |
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36 |
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37 #include "error.h" |
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38 #include "oct-obj.h" |
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39 #include "ov.h" |
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40 #include "ov-usr-fcn.h" |
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41 #include "pt-arg-list.h" |
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42 #include "pt-exp.h" |
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43 #include "pt-pr-code.h" |
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44 #include "pt-walk.h" |
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45 #include "toplev.h" |
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46 |
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47 // Argument lists. |
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48 |
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49 tree_argument_list::~tree_argument_list (void) |
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50 { |
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51 while (! empty ()) |
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52 { |
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53 tree_expression *t = remove_front (); |
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54 delete t; |
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55 } |
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56 } |
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57 |
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58 int |
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59 tree_argument_list::nargout_count (void) const |
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60 { |
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61 int retval = 0; |
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62 |
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63 for (Pix p = first (); p != 0; next (p)) |
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64 { |
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65 tree_expression *elt = this->operator () (p); |
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66 |
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67 // XXX FIXME XXX -- need to be able to determine whether elt is |
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68 // an expression that could evaluate to a cs-list object, and if |
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69 // so, how many elements are in that list. Ugly! |
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70 |
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71 retval++; |
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72 } |
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73 |
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74 return retval; |
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75 } |
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76 |
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77 bool |
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78 tree_argument_list::all_elements_are_constant (void) const |
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79 { |
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80 for (Pix p = first (); p != 0; next (p)) |
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81 { |
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82 tree_expression *elt = this->operator () (p); |
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83 |
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84 if (! elt->is_constant ()) |
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85 return false; |
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86 } |
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87 |
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88 return true; |
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89 } |
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90 |
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91 octave_value_list |
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92 tree_argument_list::convert_to_const_vector (void) |
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93 { |
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94 int len = length (); |
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95 |
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96 // XXX FIXME XXX -- would be nice to know in advance how largs args |
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97 // needs to be even when we have a list containing an all_va_args |
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98 // token. |
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99 |
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100 octave_value_list args; |
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101 int args_len = len; |
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102 args.resize (args_len); |
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103 |
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104 Pix p = first (); |
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105 int j = 0; |
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106 for (int k = 0; k < len; k++) |
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107 { |
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108 tree_expression *elt = this->operator () (p); |
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109 |
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110 if (elt) |
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111 { |
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112 octave_value tmp = elt->rvalue (); |
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113 |
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114 if (error_state) |
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115 { |
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116 ::error ("evaluating argument list element number %d", k+1); |
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117 args = octave_value_list (); |
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118 break; |
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119 } |
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120 else |
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121 { |
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122 if (tmp.is_all_va_args ()) |
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123 { |
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124 if (curr_function) |
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125 { |
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126 octave_value_list tva; |
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127 tva = curr_function->octave_all_va_args (); |
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128 int n = tva.length (); |
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129 args_len += n - 1; |
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130 args.resize (args_len); |
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131 for (int i = 0; i < n; i++) |
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132 args(j++) = tva(i); |
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133 } |
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134 else |
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135 { |
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136 ::error ("all_va_args is only valid inside functions"); |
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137 args = octave_value_list (); |
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138 break; |
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139 } |
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140 } |
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141 else if (tmp.is_cs_list ()) |
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142 { |
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143 octave_value_list tl = tmp.list_value (); |
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144 int n = tl.length (); |
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145 args_len += n - 1; |
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146 args.resize (args_len); |
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147 for (int i = 0; i < n; i++) |
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148 args(j++) = tl(i); |
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149 } |
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150 else |
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151 args(j++) = tmp; |
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152 } |
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153 next (p); |
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154 } |
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155 else |
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156 { |
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157 args(j++) = octave_value (); |
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158 break; |
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159 } |
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160 } |
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161 |
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162 args.resize (j); |
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163 |
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164 return args; |
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165 } |
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166 |
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167 string_vector |
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168 tree_argument_list::get_arg_names (void) const |
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169 { |
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170 int len = length (); |
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171 |
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172 string_vector retval (len); |
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173 |
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174 int k = 0; |
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175 |
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176 for (Pix p = first (); p; next (p)) |
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177 { |
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178 tree_expression *elt = this->operator () (p); |
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179 |
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180 retval(k++) = elt->str_print_code (); |
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181 } |
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182 |
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183 return retval; |
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184 } |
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185 |
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186 void |
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187 tree_argument_list::accept (tree_walker& tw) |
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188 { |
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189 tw.visit_argument_list (*this); |
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190 } |
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191 |
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192 /* |
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193 ;;; Local Variables: *** |
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194 ;;; mode: C++ *** |
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195 ;;; End: *** |
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196 */ |
