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1 // tree-const.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 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 2, or (at your option) any |
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11 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, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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383
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24 #if !defined (octave_tree_const_h) |
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25 #define octave_tree_const_h 1 |
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26 |
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27 #if defined (__GNUG__) |
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28 #pragma interface |
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29 #endif |
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30 |
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31 #include <iostream.h> |
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32 |
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33 #include <stdlib.h> |
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34 |
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35 #include "mx-base.h" |
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36 #include "Range.h" |
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37 |
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38 #include "tree-base.h" |
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39 #include "tree-expr.h" |
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500
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40 #include "oct-obj.h" |
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41 |
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42 class idx_vector; |
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43 class Octave_map; |
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44 |
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529
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45 struct Mapper_fcn; |
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46 |
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581
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47 // Constants. |
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48 |
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49 class |
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50 tree_constant : public tree_fvc |
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51 { |
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52 private: |
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53 |
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54 // The real representation of a constant, declared in tc-rep.h |
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55 |
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620
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56 #include "tc-rep.h" |
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57 |
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58 union |
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59 { |
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60 tree_constant *freeptr; // For custom memory management. |
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61 tree_constant_rep *rep; // The real representation. |
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62 }; |
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63 |
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64 public: |
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65 |
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66 enum magic_colon { magic_colon_t }; |
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67 enum all_va_args { all_va_args_t }; |
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68 |
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69 // Constructors. It is possible to create the following types of |
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70 // constants: |
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71 // |
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72 // constant type constructor arguments |
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73 // ------------- --------------------- |
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74 // unknown none |
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75 // real scalar double |
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76 // real matrix Matrix |
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77 // DiagMatrix |
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78 // RowVector |
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79 // ColumnVector |
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80 // complex scalar Complex |
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81 // complex matrix ComplexMatrix |
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82 // ComplexDiagMatrix |
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83 // ComplexRowVector |
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84 // ComplexColumnVector |
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85 // string char* (null terminated) |
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86 // range double, double, dobule |
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87 // Range |
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88 // magic colon tree_constant::magic_colon |
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89 // all_va_args tree_constant::all_va_args |
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90 |
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91 tree_constant (void) : tree_fvc () |
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92 { rep = new tree_constant_rep (); rep->count = 1; } |
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93 |
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94 tree_constant (double d) : tree_fvc () |
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95 { rep = new tree_constant_rep (d); rep->count = 1; } |
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96 |
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97 tree_constant (const Matrix& m) : tree_fvc () |
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98 { rep = new tree_constant_rep (m); rep->count = 1; } |
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99 |
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100 tree_constant (const DiagMatrix& d) : tree_fvc () |
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101 { rep = new tree_constant_rep (d); rep->count = 1; } |
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102 |
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103 tree_constant (const RowVector& v, int pcv = -1) : tree_fvc () |
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104 { rep = new tree_constant_rep (v, pcv); rep->count = 1; } |
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105 |
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106 tree_constant (const ColumnVector& v, int pcv = -1) : tree_fvc () |
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107 { rep = new tree_constant_rep (v, pcv); rep->count = 1; } |
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108 |
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109 tree_constant (const Complex& c) : tree_fvc () |
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110 { rep = new tree_constant_rep (c); rep->count = 1; } |
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111 |
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112 tree_constant (const ComplexMatrix& m) : tree_fvc () |
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113 { rep = new tree_constant_rep (m); rep->count = 1; } |
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114 |
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115 tree_constant (const ComplexDiagMatrix& d) : tree_fvc () |
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116 { rep = new tree_constant_rep (d); rep->count = 1; } |
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117 |
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118 tree_constant (const ComplexRowVector& v, int pcv = -1) : tree_fvc () |
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119 { rep = new tree_constant_rep (v, pcv); rep->count = 1; } |
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120 |
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121 tree_constant (const ComplexColumnVector& v, int pcv = -1) : tree_fvc () |
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122 { rep = new tree_constant_rep (v, pcv); rep->count = 1; } |
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123 |
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124 tree_constant (const char *s) : tree_fvc () |
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125 { rep = new tree_constant_rep (s); rep->count = 1; } |
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126 |
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127 tree_constant (double base, double limit, double inc) : tree_fvc () |
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128 { rep = new tree_constant_rep (base, limit, inc); rep->count = 1; } |
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129 |
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130 tree_constant (const Range& r) : tree_fvc () |
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131 { rep = new tree_constant_rep (r); rep->count = 1; } |
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132 |
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133 tree_constant (const Octave_map& m) : tree_fvc () |
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134 { rep = new tree_constant_rep (m); rep->count = 1; } |
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135 |
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136 tree_constant (tree_constant::magic_colon t) : tree_fvc () |
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137 { |
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138 tree_constant_rep::constant_type tmp; |
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139 tmp = tree_constant_rep::magic_colon; |
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140 rep = new tree_constant_rep (tmp); |
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141 rep->count = 1; |
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142 } |
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143 |
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144 tree_constant (tree_constant::all_va_args t) : tree_fvc () |
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145 { |
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146 tree_constant_rep::constant_type tmp; |
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147 tmp = tree_constant_rep::all_va_args; |
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148 rep = new tree_constant_rep (tmp); |
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149 rep->count = 1; |
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150 } |
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151 |
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620
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152 // Copy constructor. |
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153 |
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154 tree_constant (const tree_constant& a) : tree_fvc () |
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155 { rep = a.rep; rep->count++; } |
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156 |
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620
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157 // Delete the representation of this constant if the count drops to |
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158 // zero. |
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159 |
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160 ~tree_constant (void); |
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161 |
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162 void *operator new (size_t size); |
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163 void operator delete (void *p, size_t size); |
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164 |
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620
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165 // Simple assignment. |
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166 |
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167 tree_constant operator = (const tree_constant& a); |
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168 |
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620
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169 // Indexed assignment. |
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170 |
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171 tree_constant assign (tree_constant& rhs, const Octave_object& args) |
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172 { |
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173 if (rep->count > 1) |
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174 { |
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175 --rep->count; |
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176 rep = new tree_constant_rep (*rep); |
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177 rep->count = 1; |
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178 } |
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179 |
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180 rep->assign (rhs, args); |
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181 |
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182 return *this; |
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183 } |
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184 |
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185 // Simple structure assignment. |
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186 |
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782
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187 tree_constant assign_map_element (SLList<char*>& list, |
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188 tree_constant& rhs); |
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189 |
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190 // Indexed structure assignment. |
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191 |
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192 tree_constant assign_map_element (SLList<char*>& list, |
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193 tree_constant& rhs, |
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194 const Octave_object& args); |
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195 |
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620
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196 // Type. It would be nice to eliminate the need for this. |
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197 |
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198 int is_constant (void) const { return 1; } |
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199 |
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200 // Size. |
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201 |
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202 int rows (void) const { return rep->rows (); } |
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203 int columns (void) const { return rep->columns (); } |
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204 |
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205 // Does this constant have a type? Both of these are provided since |
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206 // it is sometimes more natural to write is_undefined() instead of |
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207 // ! is_defined(). |
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208 |
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209 int is_defined (void) const { return rep->is_defined (); } |
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210 int is_undefined (void) const { return rep->is_undefined (); } |
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211 |
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212 // What type is this constant? |
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213 |
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214 int is_unknown (void) const { return rep->is_unknown (); } |
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215 int is_real_scalar (void) const { return rep->is_real_scalar (); } |
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216 int is_real_matrix (void) const { return rep->is_real_matrix (); } |
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217 int is_complex_scalar (void) const { return rep->is_complex_scalar (); } |
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218 int is_complex_matrix (void) const { return rep->is_complex_matrix (); } |
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219 int is_string (void) const { return rep->is_string (); } |
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220 int is_range (void) const { return rep->is_range (); } |
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221 int is_map (void) const { return rep->is_map (); } |
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620
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222 int is_magic_colon (void) const { return rep->is_magic_colon (); } |
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223 int is_all_va_args (void) const { return rep->is_all_va_args (); } |
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224 |
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225 // Are any or all of the elements in this constant nonzero? |
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226 |
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227 tree_constant all (void) const { return rep->all (); } |
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228 tree_constant any (void) const { return rep->any (); } |
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229 |
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230 int is_real_type (void) const { return rep->is_real_type (); } |
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231 |
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620
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232 int is_complex_type (void) const { return rep->is_complex_type (); } |
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233 |
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636
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234 // Would be nice to get rid of the next four functions: |
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235 |
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236 int is_scalar_type (void) const { return rep->is_scalar_type (); } |
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237 int is_matrix_type (void) const { return rep->is_matrix_type (); } |
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620
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238 |
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628
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239 int is_numeric_type (void) const |
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240 { return rep->is_numeric_type (); } |
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241 |
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242 int is_numeric_or_range_type (void) const |
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243 { return rep->is_numeric_or_range_type (); } |
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244 |
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245 // Is this constant valid as a scalar index? |
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246 |
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247 int valid_as_scalar_index (void) const |
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248 { return rep->valid_as_scalar_index (); } |
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249 |
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250 // Is this constant valid as a zero scalar index? |
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251 |
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252 int valid_as_zero_index (void) const |
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253 { return rep->valid_as_zero_index (); } |
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254 |
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620
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255 // Does this constant correspond to a truth value? |
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256 |
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257 int is_true (void) const { return rep->is_true (); } |
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258 |
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259 // Is at least one of the dimensions of this constant zero? |
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260 |
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261 int is_empty (void) const |
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262 { return rep->is_empty (); } |
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263 |
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264 // Are the dimensions of this constant zero by zero? |
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265 |
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266 int is_zero_by_zero (void) const |
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267 { |
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268 return ((! (is_magic_colon () || is_all_va_args () || is_unknown ())) |
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269 && rows () == 0 && columns () == 0); |
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270 } |
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271 |
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272 // Values. |
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273 |
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628
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274 double double_value (int force_string_conversion = 0) const |
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275 { return rep->double_value (force_string_conversion); } |
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276 |
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277 Matrix matrix_value (int force_string_conversion = 0) const |
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278 { return rep->matrix_value (force_string_conversion); } |
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279 |
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280 Complex complex_value (int force_string_conversion = 0) const |
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281 { return rep->complex_value (force_string_conversion); } |
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282 |
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283 ComplexMatrix complex_matrix_value (int force_string_conversion = 0) const |
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284 { return rep->complex_matrix_value (force_string_conversion); } |
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285 |
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286 char *string_value (void) const |
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287 { return rep->string_value (); } |
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288 |
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289 Range range_value (void) const |
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290 { return rep->range_value (); } |
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291 |
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292 Octave_map map_value (void) const; |
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293 |
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294 tree_constant lookup_map_element (const char *ref, int insert = 0, |
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295 int silent = 0); |
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296 |
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297 tree_constant lookup_map_element (SLList<char*>& list, |
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298 int insert = 0, int silent = 0); |
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299 |
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628
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300 ColumnVector vector_value (int force_string_conversion = 0, |
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301 int force_vector_conversion = 0) const |
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302 { return rep->vector_value (); } |
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303 |
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304 ComplexColumnVector complex_vector_value (int force_string_conv = 0, |
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305 int force_vec_conv = 0) const |
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306 { return rep->complex_vector_value (); } |
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307 |
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1204
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308 // Binary and unary operations. |
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309 |
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310 friend tree_constant do_binary_op (tree_constant& a, tree_constant& b, |
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311 tree_expression::type t); |
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312 |
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313 friend tree_constant do_unary_op (tree_constant& a, |
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314 tree_expression::type t); |
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315 |
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620
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316 // Conversions. These should probably be private. If a user of this |
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317 // class wants a certain kind of constant, he should simply ask for |
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318 // it, and we should convert it if possible. |
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319 |
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628
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320 tree_constant convert_to_str (void) |
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321 { return rep->convert_to_str (); } |
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322 |
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435
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323 void convert_to_row_or_column_vector (void) |
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455
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324 { rep->convert_to_row_or_column_vector (); } |
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435
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325 |
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620
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326 // Increment or decrement this constant. |
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327 |
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328 void bump_value (tree_expression::type et) |
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329 { |
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330 if (rep->count > 1) |
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331 { |
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332 --rep->count; |
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333 rep = new tree_constant_rep (*rep); |
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334 rep->count = 1; |
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335 } |
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336 |
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337 rep->bump_value (et); |
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338 } |
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339 |
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340 void print (void); |
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341 void print (ostream& os) { rep->print (os); } |
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342 |
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620
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343 // Evaluate this constant, possibly converting complex to real, or |
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344 // matrix to scalar, etc. |
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345 |
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1199
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346 tree_constant eval (int print_result) |
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347 { |
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348 if (! is_scalar_type ()) |
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349 rep->maybe_mutate (); |
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350 |
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1199
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351 if (print_result) |
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352 print (); |
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353 |
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495
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354 return *this; |
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355 } |
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356 |
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506
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357 Octave_object eval (int print, int nargout, const Octave_object& args) |
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358 { |
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565
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359 Octave_object retval; |
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495
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360 |
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506
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361 // XXX FIXME XXX -- make it safe to call do_index() with |
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362 // args.length () == 0 |
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363 |
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506
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364 if (args.length () > 0) |
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365 retval(0) = rep->do_index (args); |
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366 else |
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367 retval(0) = *this; |
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368 |
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500
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369 if (retval(0).is_defined ()) |
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370 retval(0).eval (print); |
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1004
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371 |
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1
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372 return retval; |
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373 } |
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374 |
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620
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375 // Store the original text corresponding to this constant for later |
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376 // pretty printing. |
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377 |
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378 void stash_original_text (char *s) |
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379 { rep->stash_original_text (s); } |
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380 |
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381 // Pretty print this constant. |
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382 |
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581
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383 void print_code (ostream& os); |
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384 |
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628
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385 char *type_as_string (void) const |
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386 { return rep->type_as_string (); } |
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387 |
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747
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388 // We really do need this, and it should be private: |
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389 |
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390 private: |
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391 |
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392 void make_unique (void); |
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393 |
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394 tree_constant_rep *make_unique_map (void); |
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395 |
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396 public: |
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397 |
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620
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398 // ------------------------------------------------------------------- |
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399 |
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400 // We want to eliminate this, or at least make it private. |
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401 |
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402 tree_constant_rep::constant_type const_type (void) const |
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403 { return rep->const_type (); } |
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404 |
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636
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405 private: |
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406 |
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407 // Can we make these go away? |
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408 |
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409 // These need better names, since a range really is a numeric type. |
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410 |
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411 void force_numeric (int force_str_conv = 0) |
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412 { rep->force_numeric (force_str_conv); } |
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413 |
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414 tree_constant make_numeric (int force_str_conv = 0) const |
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415 { |
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416 if (is_numeric_type ()) |
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417 return *this; |
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418 else |
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419 return rep->make_numeric (force_str_conv); |
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420 } |
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421 |
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422 #if 0 |
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423 tree_constant make_numeric_or_range (void) const |
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424 { |
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425 if (is_numeric_type () || is_range ()) |
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426 return *this; |
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427 else |
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428 return rep->make_numeric (); |
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429 } |
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430 #endif |
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431 |
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432 tree_constant make_numeric_or_magic (void) const |
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433 { |
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922
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434 if (is_numeric_type () || is_all_va_args () || is_magic_colon ()) |
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636
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435 return *this; |
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436 else |
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437 return rep->make_numeric (); |
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438 } |
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439 |
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440 tree_constant make_numeric_or_range_or_magic (void) const |
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441 { |
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922
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442 if (is_numeric_type () || is_range () || is_all_va_args () |
|
|
443 || is_magic_colon ()) |
|
636
|
444 return *this; |
|
|
445 else |
|
|
446 return rep->make_numeric (); |
|
|
447 } |
|
1
|
448 }; |
|
|
449 |
|
1199
|
450 extern int print_as_scalar (const tree_constant& val); |
|
|
451 |
|
|
452 extern int print_as_structure (const tree_constant& val); |
|
|
453 |
|
529
|
454 // XXX FIXME XXX -- this is not used very much now. Perhaps it can be |
|
|
455 // eliminated. |
|
500
|
456 extern Octave_object vector_of_empties (int nargout, const char *fcn_name); |
|
94
|
457 |
|
1
|
458 #endif |
|
|
459 |
|
|
460 /* |
|
|
461 ;;; Local Variables: *** |
|
|
462 ;;; mode: C++ *** |
|
|
463 ;;; page-delimiter: "^/\\*" *** |
|
|
464 ;;; End: *** |
|
|
465 */ |
