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annotate src/pt-colon.cc @ 8913:35cd375d4bb3

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make tree::dup functions const
author John W. Eaton <jwe@octave.org>
date Thu, 05 Mar 2009 13:50:25 -0500
parents 73c4516fae10
children eb63fbe60fab
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1 /*
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2
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3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2004, 2005, 2006, 2007
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4 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 "error.h"
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29 #include "oct-obj.h"
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30 #include "pager.h"
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31 #include "ov.h"
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32 #include "pt-bp.h"
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33 #include "pt-colon.h"
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34 #include "pt-walk.h"
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35
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36 // Colon expressions.
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37
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38 tree_colon_expression *
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39 tree_colon_expression::append (tree_expression *t)
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40 {
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41 tree_colon_expression *retval = 0;
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42
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43 if (op_base)
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44 {
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45 if (op_limit)
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46 {
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47 if (op_increment)
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48 ::error ("invalid colon expression");
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49 else
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50 {
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51 // Stupid syntax:
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52 //
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53 // base : limit
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54 // base : increment : limit
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55
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56 op_increment = op_limit;
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57 op_limit = t;
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58 }
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59 }
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60 else
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61 op_limit = t;
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62
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63 retval = this;
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64 }
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65 else
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66 ::error ("invalid colon expression");
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67
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68 return retval;
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69 }
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70
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71 octave_value_list
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72 tree_colon_expression::rvalue (int nargout)
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73 {
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74 octave_value_list retval;
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75
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76 if (nargout > 1)
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77 error ("invalid number of output arguments for colon expression");
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78 else
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79 retval = rvalue1 (nargout);
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80
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81 return retval;
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82 }
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83
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84 octave_value
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85 tree_colon_expression::make_range (const Matrix& m_base,
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86 const Matrix& m_limit,
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87 const Matrix& m_increment,
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88 bool result_is_str, bool dq_str) const
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89 {
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90 octave_value retval;
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91
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92 bool base_empty = m_base.is_empty ();
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93 bool limit_empty = m_limit.is_empty ();
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94 bool increment_empty = m_increment.is_empty ();
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95
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96 if (base_empty || limit_empty || increment_empty)
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97 retval = Range ();
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98 else
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99 {
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100 retval = Range (m_base(0), m_limit(0), m_increment(0));
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101
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102 if (result_is_str)
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103 retval = retval.convert_to_str (false, true, dq_str ? '"' : '\'');
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104 }
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105
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106 return retval;
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107 }
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108
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109 octave_value
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110 tree_colon_expression::make_range (const octave_value& ov_base,
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111 const octave_value& ov_limit,
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112 const octave_value& ov_increment) const
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113 {
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114 octave_value retval;
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115
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116 if (ov_base.is_object () || ov_limit.is_object () ||
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117 ov_increment.is_object ())
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118 {
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119 octave_value_list tmp1;
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120 tmp1(2) = ov_limit;
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121 tmp1(1) = ov_increment;
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122 tmp1(0) = ov_base;
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123
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124 octave_value fcn = symbol_table::find_function ("colon", tmp1);
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125
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126 if (fcn.is_defined ())
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127 {
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128 octave_value_list tmp2 = fcn.do_multi_index_op (1, tmp1);
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129
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130 if (! error_state)
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131 retval = tmp2 (0);
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132 }
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133 else
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134 ::error ("can not find overloaded colon function");
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135 }
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136 else
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137 {
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138 bool result_is_str = (ov_base.is_string () && ov_limit.is_string ());
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139 bool dq_str = (ov_base.is_dq_string () || ov_limit.is_dq_string ());
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140
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141 Matrix m_base = ov_base.matrix_value (true);
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142
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143 if (error_state)
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144 eval_error ("invalid base value in colon expression");
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145 else
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146 {
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147 Matrix m_limit = ov_limit.matrix_value (true);
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148
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149 if (error_state)
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150 eval_error ("invalid limit value in colon expression");
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151 else
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152 {
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153 Matrix m_increment = ov_increment.matrix_value (true);
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154
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155 if (error_state)
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156 eval_error ("invalid increment value in colon expression");
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157 else
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158 retval = make_range (m_base, m_limit, m_increment,
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159 result_is_str, dq_str);
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160 }
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161 }
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162 }
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163
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164 return retval;
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165 }
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166
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167 octave_value
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168 tree_colon_expression::rvalue1 (int)
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169 {
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170 octave_value retval;
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171
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172 if (error_state || ! op_base || ! op_limit)
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173 return retval;
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174
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175 octave_value ov_base = op_base->rvalue1 ();
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176
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177 if (error_state || ov_base.is_undefined ())
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178 eval_error ("invalid base value in colon expression");
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179 else
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180 {
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181 octave_value ov_limit = op_limit->rvalue1 ();
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182
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183 if (error_state || ov_limit.is_undefined ())
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184 eval_error ("invalid limit value in colon expression");
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185 else if (ov_base.is_object () || ov_limit.is_object ())
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186 {
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187 octave_value_list tmp1;
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188
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189 if (op_increment)
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190 {
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191 octave_value ov_increment = op_increment->rvalue1 ();
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192
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193 if (error_state || ov_increment.is_undefined ())
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194 eval_error ("invalid increment value in colon expression");
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195 else
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196 {
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197 tmp1(2) = ov_limit;
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198 tmp1(1) = ov_increment;
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199 tmp1(0) = ov_base;
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200 }
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201 }
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202 else
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203 {
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204 tmp1(1) = ov_limit;
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205 tmp1(0) = ov_base;
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206 }
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207
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208 if (!error_state)
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209 {
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210 octave_value fcn = symbol_table::find_function ("colon", tmp1);
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211
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212 if (fcn.is_defined ())
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213 {
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214 octave_value_list tmp2 = fcn.do_multi_index_op (1, tmp1);
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215
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216 if (! error_state)
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217 retval = tmp2 (0);
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218 }
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219 else
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220 ::error ("can not find overloaded colon function");
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221 }
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222 }
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223 else
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224 {
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225 octave_value ov_increment = 1.0;
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226
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227 if (op_increment)
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228 {
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229 ov_increment = op_increment->rvalue1 ();
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230
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231 if (error_state || ov_increment.is_undefined ())
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232 eval_error ("invalid increment value in colon expression");
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233 }
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234
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235 if (! error_state)
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236 retval = make_range (ov_base, ov_limit, ov_increment);
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237 }
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238 }
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239
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240 return retval;
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241 }
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242
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243 void
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244 tree_colon_expression::eval_error (const std::string& s) const
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245 {
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246 ::error ("%s", s.c_str ());
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247 }
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248
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249 int
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250 tree_colon_expression::line (void) const
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251 {
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252 return (op_base ? op_base->line ()
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253 : (op_increment ? op_increment->line ()
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254 : (op_limit ? op_limit->line ()
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255 : -1)));
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256 }
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257
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258 int
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259 tree_colon_expression::column (void) const
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260 {
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261 return (op_base ? op_base->column ()
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262 : (op_increment ? op_increment->column ()
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263 : (op_limit ? op_limit->column ()
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264 : -1)));
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265 }
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266
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267 tree_expression *
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268 tree_colon_expression::dup (symbol_table::scope_id scope,
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269 symbol_table::context_id context) const
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270 {
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271 tree_colon_expression *new_ce = new
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272 tree_colon_expression (op_base ? op_base->dup (scope, context) : 0,
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273 op_limit ? op_limit->dup (scope, context) : 0,
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274 op_increment ? op_increment->dup (scope, context) : 0,
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275 line (), column ());
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276
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277 new_ce->copy_base (*new_ce);
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278
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279 return new_ce;
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280 }
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281
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282 void
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283 tree_colon_expression::accept (tree_walker& tw)
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284 {
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285 tw.visit_colon_expression (*this);
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286 }
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287
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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288 /*
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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289 ;;; Local Variables: ***
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290 ;;; mode: C++ ***
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291 ;;; End: ***
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292 */