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maint: Update copyright notices for 2016.
author John W. Eaton <jwe@octave.org>
date Wed, 17 Aug 2016 01:05:19 -0400
parents b571fc85953f
children 34ce5be04942
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1 /*
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2
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3 Copyright (C) 1994-2016 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 3 of the License, or (at your
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10 option) any 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, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include "Cell.h"
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28
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29 #include "defun.h"
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30 #include "error.h"
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31 #include "ov.h"
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32 #include "oct-lvalue.h"
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33 #include "pt-id.h"
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34 #include "pt-idx.h"
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35 #include "pt-misc.h"
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36 #include "pt-walk.h"
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37 #include "utils.h"
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38
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39 // Parameter lists.
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40
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41 tree_parameter_list::~tree_parameter_list (void)
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42 {
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43 while (! empty ())
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44 {
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45 iterator p = begin ();
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46 delete *p;
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47 erase (p);
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48 }
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49 }
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50
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51 void
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52 tree_parameter_list::mark_as_formal_parameters (void)
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53 {
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54 for (iterator p = begin (); p != end (); p++)
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55 {
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56 tree_decl_elt *elt = *p;
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57 elt->mark_as_formal_parameter ();
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58 }
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59 }
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60
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61 bool
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62 tree_parameter_list::validate (in_or_out type)
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63 {
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64 bool retval = true;
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65
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66 std::set<std::string> dict;
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67
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68 for (iterator p = begin (); p != end (); p++)
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69 {
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70 tree_decl_elt *elt = *p;
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71
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72 tree_identifier *id = elt->ident ();
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73
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74 if (id)
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75 {
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76 std::string name = id->name ();
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77
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78 if (id->is_black_hole ())
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79 {
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80 if (type != in)
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81 error ("invalid use of ~ in output list");
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82 }
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83 else if (dict.find (name) != dict.end ())
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84 error ("'%s' appears more than once in parameter list",
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85 name.c_str ());
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86 else
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87 dict.insert (name);
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88 }
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89 }
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90
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91 std::string va_type = (type == in ? "varargin" : "varargout");
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92
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93 size_t len = length ();
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94
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95 if (len > 0)
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96 {
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97 tree_decl_elt *elt = back ();
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98
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99 tree_identifier *id = elt->ident ();
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100
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101 if (id && id->name () == va_type)
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102 {
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103 if (len == 1)
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104 mark_varargs_only ();
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105 else
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106 mark_varargs ();
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107
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108 iterator p = end ();
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109 --p;
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110 delete *p;
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111 erase (p);
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112 }
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113 }
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114
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115 return retval;
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116 }
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117
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118 void
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119 tree_parameter_list::initialize_undefined_elements (const std::string& warnfor,
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120 int nargout,
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121 const octave_value& val)
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122 {
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123 bool warned = false;
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124
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125 int count = 0;
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126
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127 octave_value tmp = symbol_table::varval (".ignored.");
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128 const Matrix ignored = tmp.is_defined () ? tmp.matrix_value () : Matrix ();
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129
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130 octave_idx_type k = 0;
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131
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132 for (iterator p = begin (); p != end (); p++)
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133 {
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134 if (++count > nargout)
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135 break;
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136
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137 tree_decl_elt *elt = *p;
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138
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139 if (! elt->is_variable ())
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140 {
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141 if (! warned)
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142 {
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143 warned = true;
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144
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145 while (k < ignored.numel ())
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146 {
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147 octave_idx_type l = ignored (k);
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148 if (l == count)
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149 {
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150 warned = false;
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
151 break;
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
152 }
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
153 else if (l > count)
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
154 break;
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
155 else
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
156 k++;
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
157 }
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
158
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
159 if (warned)
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Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
160 {
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
161 warning_with_id
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
162 ("Octave:undefined-return-values",
1b2fcd122c6a allow user detect ignored outputs in m-functions
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parents: 10315
diff changeset
163 "%s: some elements in list of return values are undefined",
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
164 warnfor.c_str ());
1b2fcd122c6a allow user detect ignored outputs in m-functions
Jaroslav Hajek <highegg@gmail.com>
parents: 10315
diff changeset
165 }
10315
57a59eae83cc untabify src C++ source files
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parents: 10206
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166 }
4466
b18007283045 [project @ 2003-07-15 11:43:28 by jwe]
jwe
parents: 4465
diff changeset
167
10958
80cf5bf4232c avoid GCC shadow variable warning
John W. Eaton <jwe@octave.org>
parents: 10832
diff changeset
168 octave_lvalue lval = elt->lvalue ();
2973
ef3379196bcf [project @ 1997-05-15 19:27:38 by jwe]
jwe
parents: 2959
diff changeset
169
10958
80cf5bf4232c avoid GCC shadow variable warning
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parents: 10832
diff changeset
170 lval.assign (octave_value::op_asn_eq, val);
10315
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parents: 10206
diff changeset
171 }
1093
51fd9e40a7f7 [project @ 1995-02-03 21:57:34 by jwe]
jwe
parents: 1063
diff changeset
172 }
51fd9e40a7f7 [project @ 1995-02-03 21:57:34 by jwe]
jwe
parents: 1063
diff changeset
173 }
51fd9e40a7f7 [project @ 1995-02-03 21:57:34 by jwe]
jwe
parents: 1063
diff changeset
174
51fd9e40a7f7 [project @ 1995-02-03 21:57:34 by jwe]
jwe
parents: 1063
diff changeset
175 void
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diff changeset
176 tree_parameter_list::define_from_arg_vector (const octave_value_list& args)
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
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177 {
712
36ba0576bd1b [project @ 1994-09-19 14:18:15 by jwe]
jwe
parents: 672
diff changeset
178 int expected_nargin = length ();
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
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179
4219
23d06c9e1edd [project @ 2002-12-06 21:29:17 by jwe]
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180 iterator p = begin ();
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
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181
712
36ba0576bd1b [project @ 1994-09-19 14:18:15 by jwe]
jwe
parents: 672
diff changeset
182 for (int i = 0; i < expected_nargin; i++)
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
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183 {
6215
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184 tree_decl_elt *elt = *p++;
577
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diff changeset
185
2979
a3556d2adec9 [project @ 1997-05-15 22:35:37 by jwe]
jwe
parents: 2973
diff changeset
186 octave_lvalue ref = elt->lvalue ();
2959
5d1b71cd39f7 [project @ 1997-05-11 22:53:12 by jwe]
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diff changeset
187
20818
cef0448a6ed2 eliminate unnecessary uses of nargin
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188 if (i < args.length ())
10315
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189 {
57a59eae83cc untabify src C++ source files
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diff changeset
190 if (args(i).is_defined () && args(i).is_magic_colon ())
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191 {
57a59eae83cc untabify src C++ source files
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diff changeset
192 if (! elt->eval ())
20832
3951d420556c eliminate return statements after calls to error
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diff changeset
193 error ("no default value for argument %d", i+1);
10315
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194 }
57a59eae83cc untabify src C++ source files
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diff changeset
195 else
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diff changeset
196 ref.define (args(i));
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197 }
2891
1a30f46e1870 [project @ 1997-04-28 01:49:00 by jwe]
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198 else
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diff changeset
199 elt->eval ();
577
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200 }
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
201 }
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
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diff changeset
202
3239
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parents: 2982
diff changeset
203 void
4219
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diff changeset
204 tree_parameter_list::undefine (void)
3239
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parents: 2982
diff changeset
205 {
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
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parents: 2982
diff changeset
206 int len = length ();
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
jwe
parents: 2982
diff changeset
207
4219
23d06c9e1edd [project @ 2002-12-06 21:29:17 by jwe]
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diff changeset
208 iterator p = begin ();
3239
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jwe
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diff changeset
209
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
jwe
parents: 2982
diff changeset
210 for (int i = 0; i < len; i++)
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
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parents: 2982
diff changeset
211 {
6215
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diff changeset
212 tree_decl_elt *elt = *p++;
3239
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parents: 2982
diff changeset
213
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
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parents: 2982
diff changeset
214 octave_lvalue ref = elt->lvalue ();
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
jwe
parents: 2982
diff changeset
215
3538
0ff7323dab8b [project @ 2000-02-02 12:36:25 by jwe]
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parents: 3239
diff changeset
216 ref.assign (octave_value::op_asn_eq, octave_value ());
3239
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
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diff changeset
217 }
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
jwe
parents: 2982
diff changeset
218 }
d54ef0aa6e82 [project @ 1999-03-27 17:40:45 by jwe]
jwe
parents: 2982
diff changeset
219
16360
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
220 std::list<std::string>
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
221 tree_parameter_list::variable_names (void) const
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
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diff changeset
222 {
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
223 std::list<std::string> retval;
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
parents: 15467
diff changeset
224
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
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diff changeset
225 for (const_iterator p = begin (); p != end (); p++)
11115c237231 recognize variables when parsing (bug #38576)
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parents: 15467
diff changeset
226 {
11115c237231 recognize variables when parsing (bug #38576)
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parents: 15467
diff changeset
227 tree_decl_elt *elt = *p;
17787
175b392e91fe Use GNU style coding conventions for code in libinterp/
Rik <rik@octave.org>
parents: 17744
diff changeset
228
16360
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diff changeset
229 retval.push_back (elt->name ());
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
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diff changeset
230 }
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
parents: 15467
diff changeset
231
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
parents: 15467
diff changeset
232 return retval;
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
parents: 15467
diff changeset
233 }
11115c237231 recognize variables when parsing (bug #38576)
John W. Eaton <jwe@octave.org>
parents: 15467
diff changeset
234
2086
bfb775fb6fe8 [project @ 1996-04-25 05:55:19 by jwe]
jwe
parents: 1996
diff changeset
235 octave_value_list
9644
080e11f1b0c1 don't return undefined output values from user functions
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
236 tree_parameter_list::convert_to_const_vector (int nargout,
080e11f1b0c1 don't return undefined output values from user functions
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diff changeset
237 const Cell& varargout)
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
238 {
5848
415ae81d331b [project @ 2006-06-08 20:37:29 by jwe]
jwe
parents: 5781
diff changeset
239 octave_idx_type vlen = varargout.numel ();
9691
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
240 int len = length ();
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
241
21751
b571fc85953f maint: Use two spaces after period to indicate sentence break.
Rik <rik@octave.org>
parents: 21724
diff changeset
242 // Special case. Will do a shallow copy.
9691
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
243 if (len == 0)
9644
080e11f1b0c1 don't return undefined output values from user functions
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
244 return varargout;
9691
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
245 else if (nargout <= len)
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
246 {
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
247 octave_value_list retval (nargout);
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
248
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
249 int i = 0;
723
1c072f20b522 [project @ 1994-09-21 16:00:10 by jwe]
jwe
parents: 712
diff changeset
250
9691
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
251 for (iterator p = begin (); p != end (); p++)
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
252 {
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
253 tree_decl_elt *elt = *p;
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
254 if (elt->is_defined ())
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
255 retval(i++) = elt->rvalue1 ();
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
256 else
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
257 break;
318e0cdd31bd improve OOP subsref handling
Jaroslav Hajek <highegg@gmail.com>
parents: 9644
diff changeset
258 }
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
259
9691
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
260 return retval;
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
261 }
9691
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
262 else
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
263 {
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
264 octave_value_list retval (len + vlen);
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
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diff changeset
265
9691
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diff changeset
266 int i = 0;
9644
080e11f1b0c1 don't return undefined output values from user functions
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diff changeset
267
9691
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
268 for (iterator p = begin (); p != end (); p++)
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
269 {
318e0cdd31bd improve OOP subsref handling
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diff changeset
270 tree_decl_elt *elt = *p;
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
271 retval(i++) = elt->rvalue1 ();
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
272 }
723
1c072f20b522 [project @ 1994-09-21 16:00:10 by jwe]
jwe
parents: 712
diff changeset
273
9691
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
274 for (octave_idx_type j = 0; j < vlen; j++)
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
275 retval(i++) = varargout(j);
9644
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diff changeset
276
9691
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diff changeset
277 return retval;
318e0cdd31bd improve OOP subsref handling
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parents: 9644
diff changeset
278 }
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
279 }
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
280
1827
effa9400766f [project @ 1996-02-02 14:07:51 by jwe]
jwe
parents: 1742
diff changeset
281 bool
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
282 tree_parameter_list::is_defined (void)
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
283 {
1827
effa9400766f [project @ 1996-02-02 14:07:51 by jwe]
jwe
parents: 1742
diff changeset
284 bool status = true;
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
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parents:
diff changeset
285
4219
23d06c9e1edd [project @ 2002-12-06 21:29:17 by jwe]
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parents: 4212
diff changeset
286 for (iterator p = begin (); p != end (); p++)
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
287 {
6215
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parents: 5861
diff changeset
288 tree_decl_elt *elt = *p;
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
289
7336
745a8299c2b5 [project @ 2007-12-28 20:56:55 by jwe]
jwe
parents: 7017
diff changeset
290 if (! elt->is_variable ())
10315
57a59eae83cc untabify src C++ source files
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diff changeset
291 {
57a59eae83cc untabify src C++ source files
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parents: 10206
diff changeset
292 status = false;
57a59eae83cc untabify src C++ source files
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parents: 10206
diff changeset
293 break;
57a59eae83cc untabify src C++ source files
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parents: 10206
diff changeset
294 }
577
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
295 }
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
296
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
297 return status;
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
298 }
91e2164fb1b2 [project @ 1994-08-03 20:06:54 by jwe]
jwe
parents:
diff changeset
299
5861
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5848
diff changeset
300 tree_parameter_list *
7767
71f068b22fcc scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents: 7587
diff changeset
301 tree_parameter_list::dup (symbol_table::scope_id scope,
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10206
diff changeset
302 symbol_table::context_id context) const
5861
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5848
diff changeset
303 {
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5848
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304 tree_parameter_list *new_list = new tree_parameter_list ();
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305
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306 if (takes_varargs ())
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307 new_list->mark_varargs ();
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308
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309 for (const_iterator p = begin (); p != end (); p++)
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310 {
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311 const tree_decl_elt *elt = *p;
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312
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313 new_list->append (elt->dup (scope, context));
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314 }
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315
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316 return new_list;
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317 }
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318
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319 void
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320 tree_parameter_list::accept (tree_walker& tw)
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321 {
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322 tw.visit_parameter_list (*this);
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323 }
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324
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325 // Return lists.
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326
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327 tree_return_list::~tree_return_list (void)
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328 {
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329 while (! empty ())
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330 {
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331 iterator p = begin ();
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332 delete *p;
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333 erase (p);
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334 }
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335 }
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336
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337 tree_return_list *
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338 tree_return_list::dup (symbol_table::scope_id scope,
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339 symbol_table::context_id context) const
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340 {
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341 tree_return_list *new_list = new tree_return_list ();
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342
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343 for (const_iterator p = begin (); p != end (); p++)
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344 {
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345 const tree_index_expression *elt = *p;
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346
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347 new_list->append (elt->dup (scope, context));
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348 }
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349
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350 return new_list;
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351 }
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352
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353 void
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354 tree_return_list::accept (tree_walker& tw)
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355 {
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356 tw.visit_return_list (*this);
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357 }