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annotate src/pt-colon.cc @ 12770:3666e8e6f96e stable release-3-4-2

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Version 3.4.2 released. * configure.ac (AC_INIT): Version is now 3.4.2. (OCTAVE_RELEASE_DATE): Now 2011-06-24.
author John W. Eaton <jwe@octave.org>
date Fri, 24 Jun 2011 10:36:40 -0400
parents 12df7854fa7c
children 72c96de7a403
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1 /*
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2
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3 Copyright (C) 1996-2011 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
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
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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
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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27 #include "error.h"
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28 #include "oct-obj.h"
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29 #include "pager.h"
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30 #include "ov.h"
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31 #include "pt-bp.h"
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32 #include "pt-colon.h"
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33 #include "pt-walk.h"
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34
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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35 // Colon expressions.
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36
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37 tree_colon_expression *
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38 tree_colon_expression::append (tree_expression *t)
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39 {
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40 tree_colon_expression *retval = 0;
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41
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42 if (op_base)
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43 {
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44 if (op_limit)
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45 {
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46 if (op_increment)
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47 ::error ("invalid colon expression");
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48 else
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49 {
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50 // Stupid syntax:
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51 //
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52 // base : limit
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53 // base : increment : limit
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54
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55 op_increment = op_limit;
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56 op_limit = t;
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57 }
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58 }
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59 else
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60 op_limit = t;
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61
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62 retval = this;
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63 }
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64 else
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65 ::error ("invalid colon expression");
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66
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67 return retval;
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68 }
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69
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70 octave_value_list
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71 tree_colon_expression::rvalue (int nargout)
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72 {
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73 octave_value_list retval;
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74
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75 if (nargout > 1)
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76 error ("invalid number of output arguments for colon expression");
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77 else
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78 retval = rvalue1 (nargout);
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79
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80 return retval;
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81 }
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82
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83 octave_value
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84 tree_colon_expression::make_range (const Matrix& m_base,
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85 const Matrix& m_limit,
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86 const Matrix& m_increment,
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87 bool result_is_str, bool dq_str) const
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88 {
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89 octave_value retval;
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90
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91 bool base_empty = m_base.is_empty ();
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92 bool limit_empty = m_limit.is_empty ();
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93 bool increment_empty = m_increment.is_empty ();
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94
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95 if (base_empty || limit_empty || increment_empty)
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96 retval = Range ();
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97 else
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98 {
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99 retval = Range (m_base(0), m_limit(0), m_increment(0));
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100
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101 if (result_is_str)
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102 retval = retval.convert_to_str (false, true, dq_str ? '"' : '\'');
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103 }
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104
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105 return retval;
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106 }
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107
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108 octave_value
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109 tree_colon_expression::make_range (const octave_value& ov_base,
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110 const octave_value& ov_limit,
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111 const octave_value& ov_increment) const
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112 {
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113 octave_value retval;
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114
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115 if (ov_base.is_object () || ov_limit.is_object () ||
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116 ov_increment.is_object ())
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117 {
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118 octave_value_list tmp1;
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119 tmp1(2) = ov_limit;
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120 tmp1(1) = ov_increment;
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121 tmp1(0) = ov_base;
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122
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123 octave_value fcn = symbol_table::find_function ("colon", tmp1);
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124
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125 if (fcn.is_defined ())
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126 {
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127 octave_value_list tmp2 = fcn.do_multi_index_op (1, tmp1);
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128
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129 if (! error_state)
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130 retval = tmp2 (0);
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131 }
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132 else
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133 ::error ("can not find overloaded colon function");
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134 }
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135 else
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136 {
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137 bool result_is_str = (ov_base.is_string () && ov_limit.is_string ());
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138 bool dq_str = (ov_base.is_dq_string () || ov_limit.is_dq_string ());
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139
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140 Matrix m_base = ov_base.matrix_value (true);
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141
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142 if (error_state)
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143 eval_error ("invalid base value in colon expression");
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144 else
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145 {
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146 Matrix m_limit = ov_limit.matrix_value (true);
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147
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148 if (error_state)
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149 eval_error ("invalid limit value in colon expression");
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150 else
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151 {
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152 Matrix m_increment = ov_increment.matrix_value (true);
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153
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154 if (error_state)
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155 eval_error ("invalid increment value in colon expression");
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156 else
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157 retval = make_range (m_base, m_limit, m_increment,
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158 result_is_str, dq_str);
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159 }
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160 }
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161 }
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162
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163 return retval;
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164 }
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165
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166 octave_value
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167 tree_colon_expression::rvalue1 (int)
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168 {
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169 octave_value retval;
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170
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171 if (error_state || ! op_base || ! op_limit)
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172 return retval;
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173
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174 octave_value ov_base = op_base->rvalue1 ();
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175
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176 if (error_state || ov_base.is_undefined ())
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177 eval_error ("invalid base value in colon expression");
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178 else
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179 {
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180 octave_value ov_limit = op_limit->rvalue1 ();
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181
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182 if (error_state || ov_limit.is_undefined ())
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183 eval_error ("invalid limit value in colon expression");
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184 else if (ov_base.is_object () || ov_limit.is_object ())
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185 {
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186 octave_value_list tmp1;
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187
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188 if (op_increment)
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189 {
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190 octave_value ov_increment = op_increment->rvalue1 ();
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191
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192 if (error_state || ov_increment.is_undefined ())
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193 eval_error ("invalid increment value in colon expression");
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194 else
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195 {
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196 tmp1(2) = ov_limit;
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197 tmp1(1) = ov_increment;
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198 tmp1(0) = ov_base;
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199 }
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200 }
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201 else
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202 {
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203 tmp1(1) = ov_limit;
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204 tmp1(0) = ov_base;
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205 }
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206
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207 if (!error_state)
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208 {
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209 octave_value fcn = symbol_table::find_function ("colon", tmp1);
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210
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211 if (fcn.is_defined ())
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212 {
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213 octave_value_list tmp2 = fcn.do_multi_index_op (1, tmp1);
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214
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215 if (! error_state)
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216 retval = tmp2 (0);
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217 }
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218 else
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219 ::error ("can not find overloaded colon function");
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220 }
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221 }
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222 else
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223 {
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224 octave_value ov_increment = 1.0;
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225
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226 if (op_increment)
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227 {
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228 ov_increment = op_increment->rvalue1 ();
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229
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230 if (error_state || ov_increment.is_undefined ())
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231 eval_error ("invalid increment value in colon expression");
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232 }
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233
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234 if (! error_state)
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235 retval = make_range (ov_base, ov_limit, ov_increment);
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236 }
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237 }
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238
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239 return retval;
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240 }
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241
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242 void
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243 tree_colon_expression::eval_error (const std::string& s) const
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244 {
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245 ::error ("%s", s.c_str ());
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246 }
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247
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diff changeset
248 int
05e4d8c0a840 [project @ 2004-11-04 20:38:46 by jwe]
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249 tree_colon_expression::line (void) const
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diff changeset
250 {
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diff changeset
251 return (op_base ? op_base->line ()
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252 : (op_increment ? op_increment->line ()
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253 : (op_limit ? op_limit->line ()
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254 : -1)));
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255 }
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diff changeset
256
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diff changeset
257 int
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diff changeset
258 tree_colon_expression::column (void) const
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diff changeset
259 {
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260 return (op_base ? op_base->column ()
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261 : (op_increment ? op_increment->column ()
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262 : (op_limit ? op_limit->column ()
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263 : -1)));
5066
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264 }
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265
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diff changeset
266 tree_expression *
7767
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diff changeset
267 tree_colon_expression::dup (symbol_table::scope_id scope,
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268 symbol_table::context_id context) const
5861
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diff changeset
269 {
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diff changeset
270 tree_colon_expression *new_ce = new
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271 tree_colon_expression (op_base ? op_base->dup (scope, context) : 0,
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272 op_limit ? op_limit->dup (scope, context) : 0,
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273 op_increment ? op_increment->dup (scope, context) : 0,
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diff changeset
274 line (), column ());
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diff changeset
275
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276 new_ce->copy_base (*new_ce);
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277
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diff changeset
278 return new_ce;
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diff changeset
279 }
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diff changeset
280
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281 void
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282 tree_colon_expression::accept (tree_walker& tw)
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283 {
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284 tw.visit_colon_expression (*this);
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285 }