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1 // tree-expr.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_expr_h) |
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25 #define octave_tree_expr_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 <time.h> |
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32 #include <stdio.h> |
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33 #include <iostream.h> |
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34 |
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35 #include "variables.h" |
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36 #include "mappers.h" |
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37 #include "error.h" |
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38 #include "oct-obj.h" |
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39 |
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40 class tree_constant; |
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41 class tree_statement_list; |
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42 class tree_argument_list; |
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43 class tree_parameter_list; |
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44 class tree_return_list; |
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45 class symbol_record; |
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46 class symbol_table; |
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47 |
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48 class tree_matrix; |
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49 class tree_builtin; |
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50 class tree_identifier; |
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51 class tree_function; |
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52 class tree_expression; |
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53 class tree_prefix_expression; |
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54 class tree_postfix_expression; |
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55 class tree_unary_expression; |
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56 class tree_binary_expression; |
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57 class tree_assignment_expression; |
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58 class tree_simple_assignment_expression; |
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59 class tree_multi_assignment_expression; |
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60 class tree_colon_expression; |
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61 class tree_index_expression; |
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62 |
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63 #include "tree-base.h" |
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64 |
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65 // A base class for expressions. |
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66 |
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67 class |
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68 tree_expression : public tree |
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69 { |
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70 public: |
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71 int in_parens; |
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72 |
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73 enum type |
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74 { |
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75 unknown, |
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76 assignment, |
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77 simple_assignment, |
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78 multi_assignment, |
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79 add, |
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80 subtract, |
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81 multiply, |
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82 el_mul, |
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83 divide, |
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84 el_div, |
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85 leftdiv, |
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86 el_leftdiv, |
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87 power, |
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88 elem_pow, |
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89 cmp_lt, |
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90 cmp_le, |
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91 cmp_eq, |
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92 cmp_ge, |
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93 cmp_gt, |
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94 cmp_ne, |
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95 and_and, |
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96 or_or, |
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97 and, |
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98 or, |
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99 not, |
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100 unot, |
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101 uminus, |
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102 hermitian, |
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103 transpose, |
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104 colon, |
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105 index, |
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106 increment, |
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107 decrement, |
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108 }; |
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109 |
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110 tree_expression (int l = -1, int c = -1) : tree (l, c) |
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111 { |
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112 in_parens = 0; |
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113 etype = unknown; |
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114 } |
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115 |
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116 ~tree_expression (void) { } |
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117 |
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118 virtual int is_identifier (void) const |
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119 { return 0; } |
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120 |
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121 virtual int is_index_expression (void) const |
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122 { return 0; } |
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123 |
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124 virtual int is_assignment_expression (void) const |
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125 { return 0; } |
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126 |
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127 virtual int is_prefix_expression (void) const |
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128 { return 0; } |
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129 |
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130 virtual void mark_for_possible_ans_assign (void) |
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131 { panic_impossible (); } |
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132 |
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133 virtual tree_constant eval (int print) = 0; |
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134 |
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135 virtual Octave_object eval (int print, int nargout, |
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136 const Octave_object& args); |
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137 |
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138 protected: |
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139 type etype; |
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140 }; |
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141 |
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142 // General matrices. This allows us to construct matrices from |
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143 // other matrices, variables, and functions. |
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144 |
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145 class |
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146 tree_matrix : public tree_expression |
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147 { |
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148 public: |
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149 enum dir |
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150 { |
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151 md_none, |
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152 md_right, |
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153 md_down, |
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154 }; |
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155 |
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156 tree_matrix (void) |
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157 { |
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158 direction = tree_matrix::md_none; |
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159 element = 0; |
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160 next = 0; |
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161 } |
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162 |
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163 tree_matrix (tree_expression *e, tree_matrix::dir d) |
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164 { |
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165 direction = d; |
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166 element = e; |
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167 next = 0; |
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168 } |
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169 |
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170 ~tree_matrix (void); |
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171 |
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172 tree_matrix *chain (tree_expression *e, tree_matrix::dir d); |
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173 tree_matrix *reverse (void); |
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174 int length (void); |
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175 |
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176 tree_return_list *to_return_list (void); |
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177 |
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178 tree_constant eval (int print); |
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179 |
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180 void print_code (ostream& os); |
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181 |
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182 private: |
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183 tree_matrix::dir direction; // Direction from the previous element. |
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184 tree_expression *element; |
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185 tree_matrix *next; |
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186 }; |
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187 |
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188 // A base class for objects that can be evaluated with argument lists. |
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189 |
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190 class |
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191 tree_fvc : public tree_expression |
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192 { |
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193 public: |
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194 tree_fvc (int l = -1, int c = -1) : tree_expression (l, c) { } |
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195 |
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196 virtual int is_constant (void) const |
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197 { return 0; } |
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198 |
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199 // virtual int is_builtin (void) const |
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200 // { return 0; } |
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201 |
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202 virtual tree_constant assign (tree_constant& t, const Octave_object& args); |
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203 |
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204 virtual char *name (void) const |
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205 { panic_impossible (); return 0; } |
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206 |
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207 virtual void bump_value (tree_expression::type) |
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208 { panic_impossible (); } |
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209 |
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210 virtual int max_expected_args (void) |
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211 { panic_impossible (); return 0; } |
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212 |
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213 virtual char *fcn_file_name (void) |
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214 { return 0; } |
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215 |
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216 virtual time_t time_parsed (void) |
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217 { panic_impossible (); return 0; } |
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218 |
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219 virtual int is_system_fcn_file (void) const |
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220 { return 0; } |
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221 |
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222 virtual int save (ostream& os, int mark_as_global = 0, |
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223 int precision = 17) |
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224 { panic_impossible (); return 0; } |
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225 }; |
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226 |
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227 // Symbols from the symbol table. |
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228 |
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229 class |
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230 tree_identifier : public tree_fvc |
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231 { |
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232 friend class tree_index_expression; |
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233 |
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234 public: |
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235 tree_identifier (int l = -1, int c = -1) : tree_fvc (l, c) |
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236 { |
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237 sym = 0; |
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238 maybe_do_ans_assign = 0; |
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239 } |
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240 |
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241 tree_identifier (symbol_record *s, int l = -1, int c = -1) : tree_fvc (l, c) |
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242 { |
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243 sym = s; |
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244 maybe_do_ans_assign = 0; |
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245 } |
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246 |
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247 ~tree_identifier (void) { } |
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248 |
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249 int is_identifier (void) const |
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250 { return 1; } |
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251 |
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252 char *name (void) const; |
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253 |
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254 tree_identifier *define (tree_constant *t); |
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255 tree_identifier *define (tree_function *t); |
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256 |
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257 void document (char *s); |
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258 |
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259 tree_constant assign (tree_constant& t); |
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260 tree_constant assign (tree_constant& t, const Octave_object& args); |
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261 |
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262 int is_defined (void); |
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263 |
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264 void bump_value (tree_expression::type); |
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265 |
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266 tree_fvc *do_lookup (int& script_file_executed); |
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267 |
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268 void link_to_global (void) |
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269 { |
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270 if (sym) |
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271 ::link_to_global_variable (sym); |
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272 } |
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273 |
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274 void mark_as_formal_parameter (void); |
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275 |
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276 void mark_for_possible_ans_assign (void) |
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277 { maybe_do_ans_assign = 1; } |
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278 |
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279 tree_constant eval (int print); |
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280 |
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281 Octave_object eval (int print, int nargout, const Octave_object& args); |
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282 |
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283 void eval_undefined_error (void); |
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284 |
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285 void print_code (ostream& os); |
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286 |
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287 private: |
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288 symbol_record *sym; |
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289 int maybe_do_ans_assign; |
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290 }; |
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291 |
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292 // Index expressions. |
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293 |
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294 class |
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295 tree_index_expression : public tree_expression |
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296 { |
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297 public: |
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298 tree_index_expression (int l = -1, int c = -1) : tree_expression (l, c) |
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299 { |
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300 id = 0; |
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301 list = 0; |
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302 } |
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303 |
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304 tree_index_expression (tree_identifier *i, int l = -1, int c = -1) |
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305 : tree_expression (l, c) |
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306 { |
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307 id = i; |
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308 list = 0; |
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309 } |
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310 |
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311 tree_index_expression (tree_identifier *i, tree_argument_list *lst, |
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312 int l = -1, int c = -1) |
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313 : tree_expression (l, c) |
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314 { |
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315 id = i; |
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316 list = lst; |
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317 } |
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318 |
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319 ~tree_index_expression (void); |
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320 |
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321 int is_index_expression (void) const |
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322 { return 1; } |
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323 |
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324 tree_identifier *ident (void) |
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325 { return id; } |
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326 |
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327 tree_argument_list *arg_list (void) |
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328 { return list; } |
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329 |
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330 void mark_for_possible_ans_assign (void) |
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331 { |
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332 if (id) |
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333 id->mark_for_possible_ans_assign (); |
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334 } |
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335 |
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336 tree_constant eval (int print); |
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337 |
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338 Octave_object eval (int print, int nargout, const Octave_object& args); |
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339 |
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340 void eval_error (void); |
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341 |
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342 void print_code (ostream& os); |
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343 |
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344 private: |
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345 tree_identifier *id; |
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346 tree_argument_list *list; |
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347 }; |
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348 |
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349 // Prefix expressions. |
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350 |
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351 class |
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352 tree_prefix_expression : public tree_expression |
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353 { |
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354 public: |
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355 tree_prefix_expression (int l = -1, int c = -1) : tree_expression (l, c) |
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356 { |
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357 id = 0; |
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358 etype = unknown; |
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359 } |
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360 |
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361 tree_prefix_expression (tree_identifier *t, tree_expression::type et, |
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362 int l = -1, int c = -1) |
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363 : tree_expression (l, c) |
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364 { |
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365 id = t; |
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366 etype = et; |
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367 } |
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368 |
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369 ~tree_prefix_expression (void) |
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370 { delete id; } |
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371 |
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372 tree_constant eval (int print); |
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373 |
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374 void eval_error (void); |
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375 |
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376 int is_prefix_expression (void) const |
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377 { return 1; } |
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378 |
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379 char *oper (void) const; |
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380 |
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381 void print_code (ostream& os); |
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382 |
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383 private: |
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384 tree_identifier *id; |
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385 }; |
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386 |
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387 // Postfix expressions. |
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388 |
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389 class |
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390 tree_postfix_expression : public tree_expression |
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391 { |
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392 public: |
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393 tree_postfix_expression (int l = -1, int c = -1) : tree_expression (l, c) |
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394 { |
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395 id = 0; |
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396 etype = unknown; |
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397 } |
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398 |
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399 tree_postfix_expression (tree_identifier *t, tree_expression::type et, |
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400 int l = -1, int c = -1) |
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401 : tree_expression (l, c) |
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402 { |
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403 id = t; |
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404 etype = et; |
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405 } |
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406 |
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407 ~tree_postfix_expression (void) |
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408 { delete id; } |
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409 |
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410 tree_constant eval (int print); |
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411 |
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412 void eval_error (void); |
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413 |
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414 char *oper (void) const; |
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415 |
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416 void print_code (ostream& os); |
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417 |
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418 private: |
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419 tree_identifier *id; |
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420 }; |
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421 |
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422 // Unary expressions. |
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423 |
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424 class |
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425 tree_unary_expression : public tree_expression |
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426 { |
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427 public: |
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428 tree_unary_expression (int l = -1, int c = -1) : tree_expression (l, c) |
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429 { |
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430 etype = tree_expression::unknown; |
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431 op = 0; |
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432 } |
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433 |
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434 tree_unary_expression (tree_expression *a, tree_expression::type t, |
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435 int l = -1, int c = -1) |
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436 : tree_expression (l, c) |
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437 { |
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438 etype = t; |
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439 op = a; |
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440 } |
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441 |
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442 ~tree_unary_expression (void) |
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443 { delete op; } |
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444 |
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445 tree_constant eval (int print); |
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446 |
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447 void eval_error (void); |
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448 |
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449 char *oper (void) const; |
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450 |
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451 void print_code (ostream& os); |
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452 |
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453 private: |
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454 tree_expression *op; |
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455 }; |
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456 |
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457 // Binary expressions. |
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458 |
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459 class |
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460 tree_binary_expression : public tree_expression |
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461 { |
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462 public: |
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463 tree_binary_expression (int l = -1, int c = -1) : tree_expression (l, c) |
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464 { |
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465 etype = tree_expression::unknown; |
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466 op1 = 0; |
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467 op2 = 0; |
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468 } |
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469 |
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470 tree_binary_expression (tree_expression *a, tree_expression *b, |
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471 tree_expression::type t, int l = -1, int c = -1) |
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472 : tree_expression (l, c) |
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473 { |
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474 etype = t; |
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475 op1 = a; |
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476 op2 = b; |
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477 } |
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478 |
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479 ~tree_binary_expression (void) |
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480 { |
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481 delete op1; |
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482 delete op2; |
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483 } |
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484 |
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485 tree_constant eval (int print); |
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486 |
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487 void eval_error (void); |
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488 |
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581
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489 char *oper (void) const; |
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490 |
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491 void print_code (ostream& os); |
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492 |
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493 private: |
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494 tree_expression *op1; |
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495 tree_expression *op2; |
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496 }; |
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497 |
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498 // Assignment expressions. |
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499 |
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500 class |
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501 tree_assignment_expression : public tree_expression |
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502 { |
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503 public: |
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504 tree_assignment_expression (int l = -1, int c = -1) |
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505 : tree_expression (l, c) |
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581
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506 { etype = tree_expression::assignment; } |
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578
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507 |
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508 ~tree_assignment_expression (void) { } |
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509 |
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510 tree_constant eval (int print); |
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511 |
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512 int is_assignment_expression (void) const |
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513 { return 1; } |
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514 }; |
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515 |
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516 // Simple assignment expressions. |
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517 |
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518 class |
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519 tree_simple_assignment_expression : public tree_assignment_expression |
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520 { |
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521 public: |
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581
|
522 void init (int plhs, int ans_assign) |
|
|
523 { |
|
|
524 etype = tree_expression::assignment; |
|
|
525 lhs = 0; |
|
|
526 index = 0; |
|
|
527 rhs = 0; |
|
|
528 preserve = plhs; |
|
|
529 ans_ass = ans_assign; |
|
|
530 } |
|
|
531 |
|
|
532 tree_simple_assignment_expression (int plhs = 0, int ans_assign = 0, |
|
|
533 int l = -1, int c = -1) |
|
578
|
534 : tree_assignment_expression (l, c) |
|
581
|
535 { init (plhs, ans_assign); } |
|
578
|
536 |
|
|
537 tree_simple_assignment_expression (tree_identifier *i, |
|
|
538 tree_expression *r, |
|
581
|
539 int plhs = 0, int ans_assign = 0, |
|
|
540 int l = -1, int c = -1) |
|
578
|
541 : tree_assignment_expression (l, c) |
|
|
542 { |
|
581
|
543 init (plhs, ans_assign); |
|
578
|
544 lhs = i; |
|
|
545 rhs = r; |
|
|
546 } |
|
|
547 |
|
|
548 tree_simple_assignment_expression (tree_index_expression *idx_expr, |
|
|
549 tree_expression *r, |
|
581
|
550 int plhs = 0, int ans_assign = 0, |
|
|
551 int l = -1, int c = -1) |
|
578
|
552 : tree_assignment_expression (l, c) |
|
|
553 { |
|
581
|
554 init (plhs, ans_assign); |
|
578
|
555 lhs = idx_expr->ident (); |
|
|
556 index = idx_expr->arg_list (); |
|
|
557 rhs = r; |
|
|
558 } |
|
|
559 |
|
|
560 ~tree_simple_assignment_expression (void); |
|
|
561 |
|
|
562 tree_identifier *left_hand_side (void) |
|
|
563 { return lhs; } |
|
|
564 |
|
581
|
565 int is_ans_assign (void) |
|
|
566 { return ans_ass; } |
|
|
567 |
|
578
|
568 tree_constant eval (int print); |
|
|
569 |
|
|
570 void eval_error (void); |
|
|
571 |
|
581
|
572 void print_code (ostream& os); |
|
|
573 |
|
578
|
574 private: |
|
|
575 tree_identifier *lhs; |
|
|
576 tree_argument_list *index; |
|
|
577 tree_expression *rhs; |
|
|
578 int preserve; |
|
581
|
579 int ans_ass; |
|
578
|
580 }; |
|
|
581 |
|
|
582 // Multi-valued assignment expressions. |
|
|
583 |
|
|
584 class |
|
|
585 tree_multi_assignment_expression : public tree_assignment_expression |
|
|
586 { |
|
|
587 public: |
|
|
588 tree_multi_assignment_expression (int l = -1, int c = -1) |
|
|
589 : tree_assignment_expression (l, c) |
|
|
590 { |
|
|
591 etype = tree_expression::multi_assignment; |
|
|
592 lhs = 0; |
|
|
593 rhs = 0; |
|
|
594 } |
|
|
595 |
|
|
596 tree_multi_assignment_expression (tree_return_list *lst, |
|
|
597 tree_expression *r, |
|
|
598 int l = -1, int c = -1) |
|
|
599 : tree_assignment_expression (l, c) |
|
|
600 { |
|
|
601 etype = tree_expression::multi_assignment; |
|
|
602 lhs = lst; |
|
|
603 rhs = r; |
|
|
604 } |
|
|
605 |
|
|
606 ~tree_multi_assignment_expression (void); |
|
|
607 |
|
|
608 tree_constant eval (int print); |
|
|
609 |
|
|
610 Octave_object eval (int print, int nargout, const Octave_object& args); |
|
|
611 |
|
|
612 void eval_error (void); |
|
|
613 |
|
581
|
614 void print_code (ostream& os); |
|
|
615 |
|
578
|
616 private: |
|
|
617 tree_return_list *lhs; |
|
|
618 tree_expression *rhs; |
|
|
619 }; |
|
|
620 |
|
|
621 // Colon expressions. |
|
|
622 |
|
|
623 class |
|
|
624 tree_colon_expression : public tree_expression |
|
|
625 { |
|
|
626 public: |
|
|
627 tree_colon_expression (int l = -1, int c = -1) : tree_expression (l, c) |
|
|
628 { |
|
|
629 etype = tree_expression::colon; |
|
|
630 op1 = 0; |
|
|
631 op2 = 0; |
|
|
632 op3 = 0; |
|
|
633 } |
|
|
634 |
|
|
635 tree_colon_expression (tree_expression *a, tree_expression *b, |
|
|
636 int l = -1, int c = -1) |
|
|
637 : tree_expression (l, c) |
|
|
638 { |
|
|
639 etype = tree_expression::colon; |
|
|
640 op1 = a; |
|
|
641 op2 = b; |
|
|
642 op3 = 0; |
|
|
643 } |
|
|
644 |
|
|
645 ~tree_colon_expression (void) |
|
|
646 { |
|
|
647 delete op1; |
|
|
648 delete op2; |
|
|
649 delete op3; |
|
|
650 } |
|
|
651 |
|
|
652 tree_colon_expression *chain (tree_expression *t); |
|
|
653 |
|
|
654 tree_constant eval (int print); |
|
|
655 |
|
|
656 void eval_error (const char *s); |
|
|
657 |
|
581
|
658 void print_code (ostream& os); |
|
|
659 |
|
578
|
660 private: |
|
|
661 tree_expression *op1; |
|
|
662 tree_expression *op2; |
|
|
663 tree_expression *op3; |
|
|
664 }; |
|
|
665 |
|
|
666 // Builtin functions. |
|
|
667 |
|
|
668 class |
|
|
669 tree_builtin : public tree_fvc |
|
|
670 { |
|
|
671 public: |
|
|
672 tree_builtin (const char *nm = 0); |
|
|
673 |
|
|
674 tree_builtin (int i_max, int o_max, Mapper_fcn& m_fcn, |
|
|
675 const char *nm = 0); |
|
|
676 |
|
|
677 tree_builtin (int i_max, int o_max, Octave_builtin_fcn f, |
|
|
678 const char *nm = 0); |
|
|
679 |
|
|
680 ~tree_builtin (void) { } |
|
|
681 |
|
|
682 // int is_builtin (void) const; |
|
|
683 |
|
|
684 int is_mapper_function (void) const |
|
|
685 { return is_mapper; } |
|
|
686 |
|
|
687 tree_constant eval (int print); |
|
|
688 |
|
|
689 Octave_object eval (int print, int nargout, const Octave_object& args); |
|
|
690 |
|
|
691 char *name (void) const |
|
|
692 { return my_name; } |
|
|
693 |
|
|
694 int max_expected_args (void); |
|
|
695 |
|
581
|
696 void print_code (ostream& os) |
|
|
697 { |
|
|
698 os << my_name << " can't be printed because it is a builtin function\n"; |
|
|
699 } |
|
|
700 |
|
578
|
701 private: |
|
|
702 int nargin_max; |
|
|
703 int nargout_max; |
|
|
704 int is_mapper; |
|
|
705 Mapper_fcn mapper_fcn; |
|
|
706 Octave_builtin_fcn fcn; |
|
|
707 char *my_name; |
|
|
708 }; |
|
|
709 |
|
|
710 // User defined functions. |
|
|
711 |
|
494
|
712 class |
|
|
713 tree_function : public tree_fvc |
|
|
714 { |
|
|
715 public: |
|
578
|
716 void init (void) |
|
|
717 { |
|
|
718 call_depth = 0; |
|
|
719 param_list = 0; |
|
|
720 ret_list = 0; |
|
|
721 sym_tab = 0; |
|
|
722 cmd_list = 0; |
|
|
723 file_name = 0; |
|
|
724 fcn_name = 0; |
|
|
725 t_parsed = 0; |
|
|
726 system_fcn_file = 0; |
|
|
727 num_named_args = 0; |
|
|
728 num_args_passed = 0; |
|
|
729 curr_va_arg_number = 0; |
|
|
730 } |
|
494
|
731 |
|
578
|
732 tree_function (int l = -1, int c = -1) : tree_fvc (l, c) |
|
|
733 { init (); } |
|
494
|
734 |
|
578
|
735 tree_function (tree_statement_list *cl, symbol_table *st, |
|
|
736 int l = -1, int c = -1) |
|
|
737 : tree_fvc (l, c) |
|
|
738 { |
|
|
739 init (); |
|
|
740 sym_tab = st; |
|
|
741 cmd_list = cl; |
|
|
742 } |
|
|
743 |
|
|
744 ~tree_function (void) { } |
|
|
745 |
|
|
746 // tree_function *define (tree_statement_list *t); |
|
494
|
747 tree_function *define_param_list (tree_parameter_list *t); |
|
|
748 tree_function *define_ret_list (tree_parameter_list *t); |
|
|
749 |
|
|
750 void stash_fcn_file_name (char * s); |
|
578
|
751 |
|
|
752 void stash_fcn_file_time (time_t t) |
|
|
753 { t_parsed = t; } |
|
494
|
754 |
|
578
|
755 char *fcn_file_name (void) |
|
|
756 { return file_name; } |
|
|
757 |
|
|
758 time_t time_parsed (void) |
|
|
759 { return t_parsed; } |
|
494
|
760 |
|
|
761 void mark_as_system_fcn_file (void); |
|
578
|
762 |
|
|
763 int is_system_fcn_file (void) const |
|
|
764 { return system_fcn_file; } |
|
494
|
765 |
|
|
766 int takes_varargs (void) const; |
|
578
|
767 |
|
|
768 void octave_va_start (void) |
|
|
769 { curr_va_arg_number = num_named_args; } |
|
|
770 |
|
494
|
771 tree_constant octave_va_arg (void); |
|
|
772 |
|
|
773 void stash_function_name (char *s); |
|
578
|
774 |
|
|
775 char *function_name (void) |
|
|
776 { return fcn_name; } |
|
494
|
777 |
|
|
778 tree_constant eval (int print); |
|
|
779 |
|
506
|
780 Octave_object eval (int print, int nargout, const Octave_object& args); |
|
494
|
781 |
|
|
782 int max_expected_args (void); |
|
|
783 |
|
|
784 void traceback_error (void); |
|
|
785 |
|
581
|
786 void print_code (ostream& os); |
|
|
787 |
|
494
|
788 private: |
|
|
789 int call_depth; |
|
|
790 tree_parameter_list *param_list; |
|
|
791 tree_parameter_list *ret_list; |
|
|
792 symbol_table *sym_tab; |
|
578
|
793 tree_statement_list *cmd_list; |
|
494
|
794 char *file_name; |
|
|
795 char *fcn_name; |
|
|
796 time_t t_parsed; |
|
|
797 int system_fcn_file; |
|
|
798 int num_named_args; |
|
500
|
799 Octave_object args_passed; |
|
494
|
800 int num_args_passed; |
|
508
|
801 int curr_va_arg_number; |
|
494
|
802 }; |
|
|
803 |
|
|
804 #endif |
|
|
805 |
|
|
806 /* |
|
|
807 ;;; Local Variables: *** |
|
|
808 ;;; mode: C++ *** |
|
|
809 ;;; page-delimiter: "^/\\*" *** |
|
|
810 ;;; End: *** |
|
|
811 */ |
