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annotate src/pt-misc.cc @ 10454:79a56d0a6a0d ss-3-3-51

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version is now 3.3.51
author John W. Eaton <jwe@octave.org>
date Wed, 24 Mar 2010 16:27:05 -0400
parents 57a59eae83cc
children 1b2fcd122c6a
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1 /*
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2
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3 Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2002, 2003, 2004,
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4 2005, 2006, 2007, 2008, 2009 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 #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 "Cell.h"
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29
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30 #include "defun.h"
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31 #include "error.h"
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32 #include "ov.h"
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33 #include "oct-lvalue.h"
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34 #include "pt-id.h"
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35 #include "pt-idx.h"
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36 #include "pt-misc.h"
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37 #include "pt-walk.h"
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38 #include "utils.h"
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39
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40 // Parameter lists.
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41
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42 tree_parameter_list::~tree_parameter_list (void)
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43 {
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44 while (! empty ())
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45 {
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46 iterator p = begin ();
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47 delete *p;
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48 erase (p);
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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 (iterator p = begin (); p != end (); p++)
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56 {
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57 tree_decl_elt *elt = *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 bool
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63 tree_parameter_list::validate (in_or_out type)
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64 {
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65 bool retval = true;
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66
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67 std::set<std::string> dict;
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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 tree_decl_elt *elt = *p;
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72
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73 tree_identifier *id = elt->ident ();
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74
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75 if (id)
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76 {
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77 std::string name = id->name ();
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78
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79 if (id->is_black_hole ())
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80 {
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81 if (type != in)
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82 error ("invalid use of ~ in output list");
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83 }
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84 else if (dict.find (name) != dict.end ())
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85 {
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86 retval = false;
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87 error ("`%s' appears more than once in parameter list",
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88 name.c_str ());
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89 break;
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90 }
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91 else
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92 dict.insert (name);
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93 }
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94 }
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95
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96 if (! error_state)
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97 {
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98 std::string va_type = (type == in ? "varargin" : "varargout");
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99
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100 size_t len = length ();
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101
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102 if (len > 0)
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103 {
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104 tree_decl_elt *elt = back ();
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105
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106 tree_identifier *id = elt->ident ();
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107
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108 if (id && id->name () == va_type)
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109 {
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110 if (len == 1)
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111 mark_varargs_only ();
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112 else
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113 mark_varargs ();
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114
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115 iterator p = end ();
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116 --p;
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117 delete *p;
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118 erase (p);
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119 }
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120 }
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121 }
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122
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123 return retval;
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124 }
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125
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126 void
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127 tree_parameter_list::initialize_undefined_elements (const std::string& warnfor,
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128 int nargout,
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129 const octave_value& val)
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130 {
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131 bool warned = false;
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132
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133 int count = 0;
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134
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135 for (iterator p = begin (); p != end (); p++)
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136 {
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137 if (++count > nargout)
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138 break;
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139
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140 tree_decl_elt *elt = *p;
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141
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142 if (! elt->is_variable ())
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143 {
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144 if (! warned)
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145 {
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146 warned = true;
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147
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148 warning_with_id
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149 ("Octave:undefined-return-values",
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150 "%s: some elements in list of return values are undefined",
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151 warnfor.c_str ());
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152 }
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153
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154 octave_lvalue tmp = elt->lvalue ();
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155
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156 tmp.assign (octave_value::op_asn_eq, val);
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157 }
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158 }
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159 }
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160
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161 void
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162 tree_parameter_list::define_from_arg_vector (const octave_value_list& args)
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163 {
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164 int nargin = args.length ();
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165
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166 int expected_nargin = length ();
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167
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168 iterator p = begin ();
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169
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170 for (int i = 0; i < expected_nargin; i++)
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171 {
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172 tree_decl_elt *elt = *p++;
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173
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174 octave_lvalue ref = elt->lvalue ();
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175
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176 if (i < nargin)
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177 {
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178 if (args(i).is_defined () && args(i).is_magic_colon ())
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179 {
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180 if (! elt->eval ())
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181 {
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182 ::error ("no default value for argument %d\n", i+1);
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183 return;
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184 }
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185 }
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186 else
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187 ref.define (args(i));
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188 }
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189 else
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190 elt->eval ();
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191 }
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192 }
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193
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194 void
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195 tree_parameter_list::undefine (void)
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196 {
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197 int len = length ();
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198
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199 iterator p = begin ();
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200
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201 for (int i = 0; i < len; i++)
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202 {
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203 tree_decl_elt *elt = *p++;
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204
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205 octave_lvalue ref = elt->lvalue ();
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206
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207 ref.assign (octave_value::op_asn_eq, octave_value ());
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208 }
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209 }
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210
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211 octave_value_list
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212 tree_parameter_list::convert_to_const_vector (int nargout,
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213 const Cell& varargout)
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214 {
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215 octave_idx_type vlen = varargout.numel ();
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216 int len = length ();
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217
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218 // Special case. Will do a shallow copy.
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219 if (len == 0)
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220 return varargout;
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221 else if (nargout <= len)
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222 {
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223 octave_value_list retval (nargout);
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224
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225 int i = 0;
723
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226
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227 for (iterator p = begin (); p != end (); p++)
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228 {
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229 tree_decl_elt *elt = *p;
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230 if (elt->is_defined ())
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231 retval(i++) = elt->rvalue1 ();
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232 else
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233 break;
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234 }
577
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235
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236 return retval;
577
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237 }
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238 else
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239 {
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240 octave_value_list retval (len + vlen);
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241
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242 int i = 0;
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243
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244 for (iterator p = begin (); p != end (); p++)
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245 {
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246 tree_decl_elt *elt = *p;
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247 retval(i++) = elt->rvalue1 ();
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248 }
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249
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250 for (octave_idx_type j = 0; j < vlen; j++)
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251 retval(i++) = varargout(j);
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252
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253 return retval;
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254 }
577
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255 }
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256
1827
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257 bool
577
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258 tree_parameter_list::is_defined (void)
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259 {
1827
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260 bool status = true;
577
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261
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262 for (iterator p = begin (); p != end (); p++)
577
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263 {
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264 tree_decl_elt *elt = *p;
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265
7336
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266 if (! elt->is_variable ())
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267 {
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268 status = false;
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269 break;
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270 }
577
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271 }
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272
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273 return status;
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274 }
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275
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276 tree_parameter_list *
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diff changeset
277 tree_parameter_list::dup (symbol_table::scope_id scope,
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278 symbol_table::context_id context) const
5861
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279 {
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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280 tree_parameter_list *new_list = new tree_parameter_list ();
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281
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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282 if (takes_varargs ())
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283 new_list->mark_varargs ();
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284
8913
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diff changeset
285 for (const_iterator p = begin (); p != end (); p++)
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286 {
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diff changeset
287 const tree_decl_elt *elt = *p;
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288
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289 new_list->append (elt->dup (scope, context));
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290 }
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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diff changeset
291
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292 return new_list;
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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diff changeset
293 }
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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294
577
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295 void
2124
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diff changeset
296 tree_parameter_list::accept (tree_walker& tw)
581
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diff changeset
297 {
2124
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diff changeset
298 tw.visit_parameter_list (*this);
581
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diff changeset
299 }
bc813f5eb025 [project @ 1994-08-07 01:02:15 by jwe]
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300
bc813f5eb025 [project @ 1994-08-07 01:02:15 by jwe]
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diff changeset
301 // Return lists.
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diff changeset
302
1742
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diff changeset
303 tree_return_list::~tree_return_list (void)
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diff changeset
304 {
4219
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diff changeset
305 while (! empty ())
1742
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diff changeset
306 {
4219
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diff changeset
307 iterator p = begin ();
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308 delete *p;
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309 erase (p);
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310 }
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311 }
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312
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313 tree_return_list *
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314 tree_return_list::dup (symbol_table::scope_id scope,
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315 symbol_table::context_id context) const
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316 {
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317 tree_return_list *new_list = new tree_return_list ();
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318
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319 for (const_iterator p = begin (); p != end (); p++)
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320 {
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321 const tree_index_expression *elt = *p;
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322
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323 new_list->append (elt->dup (scope, context));
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324 }
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325
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326 return new_list;
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327 }
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328
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329 void
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330 tree_return_list::accept (tree_walker& tw)
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331 {
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332 tw.visit_return_list (*this);
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333 }