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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_base_value_h) |
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24 #define octave_base_value_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cstdlib> |
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31 |
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32 #include <string> |
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33 |
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34 class ostream; |
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35 |
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36 #include "mx-base.h" |
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37 #include "str-vec.h" |
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38 |
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39 #include "error.h" |
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40 #include "ov.h" |
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41 #include "ov-typeinfo.h" |
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42 |
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43 class Octave_map; |
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44 class octave_value_list; |
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45 |
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46 class tree_walker; |
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47 |
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48 // A base value type, so that derived types only have to redefine what |
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49 // they need (if they are derived from octave_base_value instead of |
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50 // octave_value). |
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51 |
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52 class |
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53 octave_base_value : public octave_value |
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54 { |
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55 public: |
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56 |
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57 octave_base_value (void) |
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58 : octave_value (octave_xvalue ()) { } |
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59 |
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60 octave_base_value (const octave_base_value&) |
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61 : octave_value (octave_xvalue ()) { } |
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62 |
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63 ~octave_base_value (void) { } |
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64 |
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65 octave_value *clone (void) { return new octave_base_value (*this); } |
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66 |
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67 type_conv_fcn numeric_conversion_function (void) const |
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68 { return static_cast<type_conv_fcn> (0); } |
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69 |
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70 octave_value *try_narrowing_conversion (void) |
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71 { return static_cast<octave_value *> (0); } |
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72 |
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73 octave_value do_index_op (const octave_value_list& idx); |
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74 |
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75 octave_value_list do_index_op (int nargout, const octave_value_list& idx); |
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76 |
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77 idx_vector index_vector (void) const; |
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78 |
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79 octave_value |
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80 do_struct_elt_index_op (const string& nm, const octave_value_list& idx, |
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81 bool silent); |
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82 |
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83 octave_value do_struct_elt_index_op (const string& nm, bool silent); |
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84 |
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85 octave_variable_reference |
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86 struct_elt_ref (octave_value *parent, const string& nm); |
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87 |
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88 int rows (void) const { return -1; } |
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89 |
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90 int columns (void) const { return -1; } |
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91 |
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92 bool is_defined (void) const { return false; } |
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93 |
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94 bool is_real_scalar (void) const { return false; } |
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95 |
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96 bool is_real_matrix (void) const { return false; } |
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97 |
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98 bool is_complex_scalar (void) const { return false; } |
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99 |
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100 bool is_complex_matrix (void) const { return false; } |
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101 |
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102 bool is_char_matrix (void) const { return false; } |
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103 |
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104 bool is_string (void) const { return false; } |
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105 |
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106 bool is_range (void) const { return false; } |
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107 |
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108 bool is_map (void) const { return false; } |
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109 |
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110 bool is_file (void) const { return false; } |
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111 |
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112 bool is_list (void) const { return false; } |
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113 |
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114 bool is_magic_colon (void) const { return false; } |
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115 |
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116 bool is_all_va_args (void) const { return false; } |
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117 |
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118 octave_value all (void) const { return 0.0; } |
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119 |
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120 octave_value any (void) const { return 0.0; } |
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121 |
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122 bool is_real_type (void) const { return false; } |
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123 |
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124 bool is_complex_type (void) const { return false; } |
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125 |
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126 // Would be nice to get rid of the next four functions: |
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127 |
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128 bool is_scalar_type (void) const { return false; } |
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129 |
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130 bool is_matrix_type (void) const { return false; } |
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131 |
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132 bool is_numeric_type (void) const { return false; } |
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133 |
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134 bool valid_as_scalar_index (void) const { return false; } |
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135 |
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136 bool valid_as_zero_index (void) const { return false; } |
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137 |
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138 bool is_true (void) const { return false; } |
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139 |
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140 bool is_empty (void) const |
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141 { return (rows () == 0 || columns () == 0); } |
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142 |
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143 bool is_zero_by_zero (void) const |
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144 { return (rows () == 0 && columns () == 0); } |
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145 |
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146 bool is_constant (void) const { return false; } |
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147 |
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148 bool is_function (void) const { return false; } |
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149 |
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150 double double_value (bool) const; |
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151 |
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152 double scalar_value (bool) const { return double_value (); } |
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153 |
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154 Matrix matrix_value (bool frc_str_conv = false) const; |
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155 |
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156 Complex complex_value (bool frc_str_conv = false) const; |
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157 |
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158 ComplexMatrix complex_matrix_value (bool frc_str_conv = false) const; |
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159 |
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160 charMatrix char_matrix_value (bool frc_str_conv = false) const; |
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161 |
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162 string_vector all_strings (void) const; |
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163 |
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164 string string_value (void) const; |
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165 |
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166 Range range_value (void) const; |
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167 |
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168 Octave_map map_value (void) const; |
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169 |
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170 octave_stream *stream_value (void) const; |
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171 |
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172 int stream_number (void) const; |
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173 |
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174 octave_function *function_value (bool silent); |
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175 |
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176 octave_value_list list_value (void) const; |
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177 |
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178 bool bool_value (void) const; |
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179 |
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180 boolMatrix bool_matrix_value (void) const; |
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181 |
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182 octave_value not (void) const; |
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183 |
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184 octave_value uminus (void) const; |
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185 |
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186 octave_value transpose (void) const; |
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187 |
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188 octave_value hermitian (void) const; |
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189 |
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190 void increment (void); |
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191 |
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192 void decrement (void); |
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193 |
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194 octave_value convert_to_str (void) const; |
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195 |
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196 void convert_to_row_or_column_vector (void); |
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197 |
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198 void print (ostream& os, bool pr_as_read_syntax = false) const; |
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199 |
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200 void print_raw (ostream& os, bool pr_as_read_syntax = false) const; |
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201 |
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202 bool print_name_tag (ostream& os, const string& name) const; |
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203 |
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204 int type_id (void) const { return t_id; } |
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205 |
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206 string type_name (void) const { return t_name; } |
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207 |
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208 static int static_type_id (void) { return t_id; } |
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209 |
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210 static void register_type (void) |
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211 { t_id = octave_value_typeinfo::register_type (t_name); } |
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212 |
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213 private: |
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214 |
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215 // Type id of base value objects, set by register_type(). |
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216 static int t_id; |
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217 |
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218 // Type name of base value objects, defined in ov-base.cc. |
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219 static const string t_name; |
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220 }; |
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221 |
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222 #endif |
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223 |
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224 /* |
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225 ;;; Local Variables: *** |
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226 ;;; mode: C++ *** |
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227 ;;; End: *** |
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228 */ |
