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1 // Tree classes. -*- C++ -*- |
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2 /* |
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3 |
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338
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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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383
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24 #if !defined (octave_tree_h) |
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25 #define octave_tree_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 <stdio.h> |
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32 |
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33 class ostrstream; |
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34 |
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35 #include "builtins.h" |
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36 #include "tree-base.h" |
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37 #include "tree-const.h" |
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38 |
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39 class symbol_record; |
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40 class symbol_table; |
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41 |
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42 #ifndef TREE_FCN_TYPEDEFS |
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43 #define TREE_FCN_TYPEDEFS 1 |
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44 |
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45 typedef tree_constant (*Text_fcn)(int, char **); |
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46 typedef tree_constant* (*General_fcn)(const tree_constant *, int, int); |
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47 |
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48 #endif |
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49 |
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50 #ifndef NULL_TREE |
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51 #define NULL_TREE (tree *) NULL |
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52 #endif |
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53 |
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54 #ifndef NULL_TREE_CONST |
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55 #define NULL_TREE_CONST (tree_constant *) NULL |
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56 #endif |
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57 |
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58 /* |
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59 * Forward declarations. |
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60 */ |
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61 class tree; |
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62 class tree_constant_rep; |
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63 class tree_constant; |
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64 class tree_matrix; |
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65 class tree_builtin; |
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66 class tree_identifier; |
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67 class tree_function; |
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68 class tree_expression; |
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69 class tree_prefix_expression; |
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70 class tree_postfix_expression; |
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71 class tree_unary_expression; |
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72 class tree_binary_expression; |
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73 class tree_assignment_expression; |
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74 class tree_simple_assignment_expression; |
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75 class tree_multi_assignment_expression; |
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76 class tree_colon_expression; |
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77 class tree_index_expression; |
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78 class tree_argument_list; |
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79 class tree_parameter_list; |
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80 class tree_return_list; |
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81 class tree_command; |
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82 class tree_command_list; |
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195
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83 class tree_global_command; |
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84 class tree_while_command; |
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85 class tree_for_command; |
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86 class tree_if_command; |
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87 class tree_break_command; |
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88 class tree_continue_command; |
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89 class tree_return_command; |
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90 class tree_plot_limits; |
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91 class tree_plot_range; |
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92 class tree_subplot; |
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93 class tree_subplot_using; |
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94 class tree_subplot_style; |
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95 class tree_subplot_list; |
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96 class tree_plot_command; |
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97 |
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98 /* |
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99 * General matrices. This allows us to construct matrices from |
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100 * other matrices, variables, and functions. |
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101 */ |
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102 class |
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103 tree_matrix : public tree |
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104 { |
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105 public: |
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106 tree_matrix (void); |
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107 tree_matrix (tree *t, tree::matrix_dir d); |
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108 |
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109 ~tree_matrix (void); |
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110 |
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111 tree_matrix *chain (tree *t, tree::matrix_dir d); |
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112 tree_matrix *reverse (void); |
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113 int length (void); |
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114 |
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115 tree_return_list *to_return_list (void); |
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116 |
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117 tree_constant eval (int print); |
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118 |
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119 private: |
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120 tree::matrix_dir dir; // Direction to the next element. |
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121 tree *element; |
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122 tree_matrix *next; |
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123 }; |
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124 |
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125 /* |
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126 * Builtin functions. |
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127 */ |
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128 class |
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129 tree_builtin : public tree |
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130 { |
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131 public: |
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195
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132 tree_builtin (const char *nm = (char *) NULL); |
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133 |
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134 tree_builtin (int i_max, int o_max, Mapper_fcn& m_fcn, |
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135 const char *nm = (char *) NULL); |
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136 |
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137 tree_builtin (int i_max, int o_max, Text_fcn t_fcn, |
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138 const char *nm = (char *) NULL); |
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139 |
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140 tree_builtin (int i_max, int o_max, General_fcn t_fcn, |
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141 const char *nm = (char *) NULL); |
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142 |
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143 ~tree_builtin (void); |
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144 |
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164
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145 int is_builtin (void) const; |
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146 |
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147 tree_constant eval (int print); |
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148 |
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149 tree_constant *eval (int print, int nargout); |
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150 |
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482
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151 tree_constant *eval (const tree_constant *args, int nargin, |
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152 int nargout, int print); |
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153 |
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200
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154 char *name (void) const; |
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155 |
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156 int max_expected_args (void); |
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157 |
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158 private: |
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159 int nargin_max; |
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160 int nargout_max; |
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161 Mapper_fcn mapper_fcn; |
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162 Text_fcn text_fcn; |
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163 General_fcn general_fcn; |
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195
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164 char *my_name; |
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165 }; |
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166 |
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167 /* |
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168 * Symbols from the symbol table. |
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169 */ |
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170 class |
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171 tree_identifier : public tree |
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172 { |
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173 friend class tree_index_expression; |
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174 |
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175 public: |
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176 tree_identifier (int l = -1, int c = -1); |
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177 tree_identifier (symbol_record *s, int l = -1, int c = -1); |
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178 |
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179 ~tree_identifier (void); |
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180 |
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164
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181 int is_identifier (void) const; |
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182 |
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200
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183 char *name (void) const; |
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195
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184 void rename (const char *n); |
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185 |
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186 tree_identifier *define (tree_constant *t); |
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187 tree_identifier *define (tree_function *t); |
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188 |
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189 void document (char *s); |
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190 |
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191 tree_constant assign (tree_constant& t); |
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192 tree_constant assign (tree_constant& t, tree_constant *args, int nargs); |
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193 |
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194 void bump_value (tree::expression_type); |
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195 |
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338
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196 int parse_fcn_file (int exec_script = 1); |
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339
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197 int parse_fcn_file (char *ff, int exec_script = 1); |
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198 void parse_fcn_file (FILE *ffile, char *ff); |
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199 |
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200 tree *do_lookup (int& script_file_executed); |
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201 |
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202 void mark_as_formal_parameter (void); |
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203 |
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195
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204 void mark_for_possible_ans_assign (void); |
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205 |
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206 tree_constant eval (int print); |
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207 |
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208 tree_constant *eval (int print, int nargout); |
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209 |
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482
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210 tree_constant *eval (const tree_constant *args, int nargin, |
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211 int nargout, int print); |
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212 |
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213 void eval_undefined_error (void); |
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214 |
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215 private: |
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216 symbol_record *sym; |
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195
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217 int maybe_do_ans_assign; |
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218 }; |
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219 |
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220 /* |
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221 * User defined functions. |
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222 */ |
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223 class |
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224 tree_function : public tree |
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225 { |
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226 public: |
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227 tree_function (void); |
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228 tree_function (tree *cl, symbol_table *st); |
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229 |
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230 ~tree_function (void); |
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231 |
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232 tree_function *define (tree *t); |
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233 tree_function *define_param_list (tree_parameter_list *t); |
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234 tree_function *define_ret_list (tree_parameter_list *t); |
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235 |
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338
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236 void stash_fcn_file_name (char * s); |
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237 void stash_fcn_file_time (time_t t); |
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238 |
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338
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239 char *fcn_file_name (void); |
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240 time_t time_parsed (void); |
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241 |
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338
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242 void mark_as_system_fcn_file (void); |
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243 int is_system_fcn_file (void) const; |
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244 |
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206
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245 int takes_varargs (void) const; |
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367
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246 void octave_va_start (void); |
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247 tree_constant octave_va_arg (void); |
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248 |
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249 void stash_function_name (char *s); |
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250 char *function_name (void); |
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251 |
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252 tree_constant eval (int print); |
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253 |
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254 tree_constant *eval (int print, int nargout); |
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255 |
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482
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256 tree_constant *eval (const tree_constant *args, int nargin, |
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257 int nargout, int print); |
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258 |
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259 int max_expected_args (void); |
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260 |
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143
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261 void traceback_error (void); |
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262 |
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263 private: |
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264 int call_depth; |
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265 tree_parameter_list *param_list; |
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266 tree_parameter_list *ret_list; |
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267 symbol_table *sym_tab; |
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268 tree *cmd_list; |
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269 char *file_name; |
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270 char *fcn_name; |
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271 time_t t_parsed; |
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272 int system_fcn_file; |
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206
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273 int varargs_ok; |
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210
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274 int num_named_args; |
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206
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275 const tree_constant *args_passed; |
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276 int num_args_passed; |
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277 int curr_arg_number; |
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278 }; |
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279 |
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280 /* |
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281 * A base class for expressions. |
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282 */ |
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283 class |
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284 tree_expression : public tree |
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285 { |
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286 public: |
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287 tree_expression (void); |
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288 |
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289 ~tree_expression (void); |
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290 |
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291 tree_constant eval (int print); |
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292 |
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293 protected: |
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294 expression_type etype; |
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295 }; |
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296 |
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297 /* |
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298 * Prefix expressions. |
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299 */ |
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300 class |
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301 tree_prefix_expression : public tree_expression |
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302 { |
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303 public: |
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304 tree_prefix_expression (int l = -1, int c = -1); |
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305 tree_prefix_expression (tree_identifier *t, tree::expression_type et, |
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306 int l = -1, int c = -1); |
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307 |
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308 ~tree_prefix_expression (void); |
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309 |
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310 tree_constant eval (int print); |
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311 |
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143
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312 void eval_error (void); |
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313 |
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314 int is_prefix_expression (void) const; |
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315 |
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316 private: |
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317 tree_identifier *id; |
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318 }; |
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319 |
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320 /* |
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321 * Postfix expressions. |
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322 */ |
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323 class |
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324 tree_postfix_expression : public tree_expression |
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325 { |
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326 public: |
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327 tree_postfix_expression (int l = -1, int c = -1); |
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328 tree_postfix_expression (tree_identifier *t, tree::expression_type et, |
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329 int l = -1, int c = -1); |
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330 |
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331 ~tree_postfix_expression (void); |
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332 |
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333 tree_constant eval (int print); |
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334 |
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143
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335 void eval_error (void); |
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336 |
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337 private: |
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338 tree_identifier *id; |
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339 }; |
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340 |
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341 /* |
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342 * Unary expressions. |
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343 */ |
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344 class |
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345 tree_unary_expression : public tree_expression |
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346 { |
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347 public: |
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143
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348 tree_unary_expression (int l = -1, int c = -1); |
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349 tree_unary_expression (tree *a, tree::expression_type t, int l = -1, |
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350 int c = -1); |
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351 |
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352 ~tree_unary_expression (void); |
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353 |
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354 tree_constant eval (int print); |
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355 |
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143
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356 void eval_error (void); |
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357 |
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358 private: |
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359 tree *op; |
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360 }; |
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361 |
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362 /* |
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363 * Binary expressions. |
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364 */ |
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365 class |
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366 tree_binary_expression : public tree_expression |
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367 { |
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368 public: |
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143
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369 tree_binary_expression (int l = -1, int c = -1); |
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370 tree_binary_expression (tree *a, tree *b, tree::expression_type t, |
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371 int l = -1, int c = -1); |
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372 |
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373 ~tree_binary_expression (void); |
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374 |
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375 tree_constant eval (int print); |
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376 |
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143
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377 void eval_error (void); |
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378 |
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379 private: |
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380 tree *op1; |
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381 tree *op2; |
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382 }; |
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383 |
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384 /* |
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385 * Assignment expressions. |
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386 */ |
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387 class |
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388 tree_assignment_expression : public tree_expression |
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389 { |
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390 public: |
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391 int in_parens; |
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392 |
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393 tree_assignment_expression (void); |
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394 |
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395 ~tree_assignment_expression (void); |
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396 |
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397 tree_constant eval (int print); |
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398 |
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164
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399 int is_assignment_expression (void) const; |
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400 }; |
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401 |
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402 /* |
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403 * Simple assignment expressions. |
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404 */ |
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405 class |
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406 tree_simple_assignment_expression : public tree_assignment_expression |
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407 { |
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408 public: |
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143
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409 tree_simple_assignment_expression (int l = -1, int c = -1); |
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410 tree_simple_assignment_expression (tree_identifier *i, tree *r, |
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411 int l = -1, int c = -1); |
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412 tree_simple_assignment_expression (tree_index_expression *idx_expr, |
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413 tree *r, int l = -1, int c = -1); |
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414 |
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415 ~tree_simple_assignment_expression (void); |
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416 |
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417 tree_constant eval (int print); |
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418 |
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143
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419 void eval_error (void); |
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420 |
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421 private: |
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422 tree_identifier *lhs; |
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423 tree_argument_list *index; |
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424 tree *rhs; |
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425 }; |
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426 |
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427 /* |
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428 * Multi-valued assignment expressions. |
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429 */ |
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430 class |
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431 tree_multi_assignment_expression : public tree_assignment_expression |
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432 { |
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433 public: |
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143
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434 tree_multi_assignment_expression (int l = -1, int c = -1); |
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435 tree_multi_assignment_expression (tree_return_list *lst, tree *r, |
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436 int l = -1, int c = -1); |
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437 |
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438 ~tree_multi_assignment_expression (void); |
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439 |
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440 tree_constant eval (int print); |
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441 |
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442 tree_constant *eval (int print, int nargout); |
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443 |
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143
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444 void eval_error (void); |
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445 |
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446 private: |
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447 tree_return_list *lhs; |
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448 tree *rhs; |
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449 }; |
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450 |
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451 /* |
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452 * Colon expressions. |
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453 */ |
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454 class |
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455 tree_colon_expression : public tree_expression |
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456 { |
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457 public: |
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143
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458 tree_colon_expression (int l = -1, int c = -1); |
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459 tree_colon_expression (tree *a, tree *b, int l = -1, int c = -1); |
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460 |
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461 ~tree_colon_expression (void); |
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462 |
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463 tree_colon_expression *chain (tree *t); |
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464 |
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465 tree_constant eval (int print); |
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466 |
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143
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467 void eval_error (const char *s); |
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468 |
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469 private: |
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470 tree *op1; |
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471 tree *op2; |
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472 tree *op3; |
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473 }; |
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474 |
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475 /* |
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476 * Index expressions. |
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477 */ |
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478 class |
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479 tree_index_expression : public tree_expression |
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480 { |
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481 public: |
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143
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482 tree_index_expression (int l = -1, int c = -1); |
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483 tree_index_expression (tree_identifier *i, int l = -1, int c = -1); |
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484 tree_index_expression (tree_identifier *i, tree_argument_list *lst, |
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485 int l = -1, int c = -1); |
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486 |
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487 ~tree_index_expression (void); |
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488 |
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164
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489 int is_index_expression (void) const; |
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490 |
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491 tree_identifier *ident (void); |
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492 |
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493 tree_argument_list *arg_list (void); |
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494 |
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195
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495 void mark_for_possible_ans_assign (void); |
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496 |
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1
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497 tree_constant eval (int print); |
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498 |
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499 tree_constant *eval (int print, int nargout); |
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500 |
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143
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501 void eval_error (void); |
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502 |
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1
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503 private: |
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504 tree_identifier *id; |
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505 tree_argument_list *list; |
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506 }; |
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507 |
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508 /* |
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509 * Argument lists. |
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510 */ |
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511 class |
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512 tree_argument_list : public tree |
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513 { |
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514 public: |
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515 tree_argument_list (void); |
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516 tree_argument_list (tree *t); |
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517 |
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518 ~tree_argument_list (void); |
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519 |
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520 tree_argument_list *chain (tree *t); |
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521 tree_argument_list *reverse (void); |
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522 int length (void); |
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523 |
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524 tree_argument_list *next_elem (void); |
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525 |
|
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526 tree_constant *convert_to_const_vector (int& nargs); |
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527 |
|
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528 tree_constant eval (int print); |
|
|
529 |
|
|
530 private: |
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531 tree *arg; |
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532 tree_argument_list *next; |
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533 }; |
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534 |
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535 /* |
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536 * Parameter lists. Almost like argument lists, except that the |
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|
537 * elements are only supposed to be identifiers, never constants or |
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538 * expressions. |
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539 */ |
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540 class |
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541 tree_parameter_list : public tree |
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542 { |
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543 public: |
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544 tree_parameter_list (void); |
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545 tree_parameter_list (tree_identifier *t); |
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546 |
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547 ~tree_parameter_list (void); |
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548 |
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549 tree_parameter_list *chain (tree_identifier *t); |
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|
550 tree_parameter_list *reverse (void); |
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551 int length (void); |
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|
552 |
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200
|
553 char *name (void) const; |
|
1
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554 |
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555 void mark_as_formal_parameters (void); |
|
|
556 |
|
206
|
557 void mark_varargs (void); |
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558 int takes_varargs (void) const; |
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559 |
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1
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560 tree_identifier *define (tree_constant *t); |
|
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561 |
|
395
|
562 void define_from_arg_vector (const tree_constant *args, int nargin); |
|
|
563 |
|
|
564 tree_constant *convert_to_const_vector (void); |
|
|
565 |
|
1
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566 tree_parameter_list *next_elem (void); |
|
|
567 |
|
|
568 tree_constant eval (int print); |
|
|
569 |
|
|
570 private: |
|
206
|
571 int marked_for_varargs; |
|
1
|
572 tree_identifier *param; |
|
|
573 tree_parameter_list *next; |
|
|
574 }; |
|
|
575 |
|
|
576 /* |
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|
577 * Return lists. Almost like parameter lists, except that the |
|
|
578 * elements may also be index expressions. |
|
|
579 */ |
|
|
580 class |
|
|
581 tree_return_list : public tree |
|
|
582 { |
|
|
583 public: |
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|
584 tree_return_list (void); |
|
|
585 tree_return_list (tree_identifier *t); |
|
|
586 tree_return_list (tree_index_expression *t); |
|
|
587 |
|
|
588 ~tree_return_list (void); |
|
|
589 |
|
|
590 tree_return_list *chain (tree_identifier *t); |
|
|
591 tree_return_list *chain (tree_index_expression *t); |
|
|
592 tree_return_list *reverse (void); |
|
|
593 int length (void); |
|
|
594 |
|
|
595 tree_index_expression *idx_expr (void); |
|
|
596 |
|
|
597 tree_return_list *next_elem (void); |
|
|
598 |
|
|
599 tree_constant eval (int print); |
|
|
600 |
|
|
601 private: |
|
|
602 tree_index_expression *retval; |
|
|
603 tree_return_list *next; |
|
|
604 }; |
|
|
605 |
|
|
606 /* |
|
|
607 * A base class for commands. |
|
|
608 */ |
|
|
609 class |
|
|
610 tree_command : public tree |
|
|
611 { |
|
|
612 }; |
|
|
613 |
|
|
614 /* |
|
|
615 * A command or two to be executed. |
|
|
616 */ |
|
|
617 class |
|
|
618 tree_command_list : public tree_command |
|
|
619 { |
|
|
620 public: |
|
|
621 tree_command_list (void); |
|
|
622 tree_command_list (tree *t); |
|
|
623 |
|
|
624 ~tree_command_list (void); |
|
|
625 |
|
|
626 tree_command_list *chain (tree *t); |
|
|
627 tree_command_list *reverse (void); |
|
|
628 |
|
|
629 void set_print_flag (int print); |
|
|
630 |
|
|
631 tree_constant eval (int print); |
|
|
632 |
|
|
633 private: |
|
|
634 tree *command; // Command to execute. |
|
|
635 int print_flag; // Print result of eval for this command? |
|
|
636 tree_command_list *next; // Next command in list. |
|
|
637 }; |
|
|
638 |
|
|
639 /* |
|
195
|
640 * Global. |
|
|
641 */ |
|
|
642 class |
|
|
643 tree_global_command : public tree_command |
|
|
644 { |
|
|
645 public: |
|
|
646 tree_global_command (int l = -1, int c = -1); |
|
|
647 tree_global_command (symbol_record *s, int l = -1, int c = -1); |
|
|
648 tree_global_command (symbol_record *s, tree *e, int l = -1, int c = -1); |
|
|
649 |
|
|
650 ~tree_global_command (void); |
|
|
651 |
|
|
652 tree_global_command *chain (symbol_record *s, int l = -1, int c = -1); |
|
|
653 tree_global_command *chain (symbol_record *s, tree *e, int l = -1, int c = -1); |
|
|
654 tree_global_command *reverse (void); |
|
|
655 |
|
|
656 tree_constant eval (int print); |
|
|
657 |
|
|
658 void eval_error (void); |
|
|
659 |
|
|
660 private: |
|
|
661 symbol_record *sr; // Symbol record from local symbol table. |
|
|
662 tree *rhs; // RHS of assignment. |
|
|
663 tree_global_command *next; // Next global command. |
|
|
664 }; |
|
|
665 |
|
|
666 /* |
|
1
|
667 * While. |
|
|
668 */ |
|
|
669 class |
|
|
670 tree_while_command : public tree_command |
|
|
671 { |
|
|
672 public: |
|
191
|
673 tree_while_command (int l = -1, int c = -1); |
|
|
674 tree_while_command (tree *e, int l = -1, int c = -1); |
|
|
675 tree_while_command (tree *e, tree *lst, int l = -1, int c = -1); |
|
1
|
676 |
|
|
677 ~tree_while_command (void); |
|
|
678 |
|
|
679 tree_constant eval (int print); |
|
|
680 |
|
191
|
681 void eval_error (void); |
|
|
682 |
|
1
|
683 private: |
|
|
684 tree *expr; // Expression to test. |
|
|
685 tree *list; // List of commands to execute. |
|
|
686 }; |
|
|
687 |
|
|
688 /* |
|
|
689 * For. |
|
|
690 */ |
|
|
691 class |
|
|
692 tree_for_command : public tree_command |
|
|
693 { |
|
|
694 public: |
|
191
|
695 tree_for_command (int l = -1, int c = -1); |
|
|
696 tree_for_command (tree_index_expression *id, tree *e, tree *lst, |
|
|
697 int l = -1, int c = -1); |
|
1
|
698 |
|
|
699 ~tree_for_command (void); |
|
|
700 |
|
|
701 tree_constant eval (int print); |
|
|
702 |
|
191
|
703 void eval_error (void); |
|
|
704 |
|
1
|
705 private: |
|
413
|
706 tree_constant do_for_loop_once (tree_constant *rhs, int& quit); |
|
|
707 |
|
117
|
708 tree_index_expression *id; // Identifier to modify. |
|
1
|
709 tree *expr; // Expression to evaluate. |
|
|
710 tree *list; // List of commands to execute. |
|
|
711 }; |
|
|
712 |
|
|
713 /* |
|
|
714 * Simple if. |
|
|
715 */ |
|
|
716 class |
|
|
717 tree_if_command : public tree_command |
|
|
718 { |
|
|
719 public: |
|
191
|
720 tree_if_command (int l = -1, int c = -1); |
|
|
721 tree_if_command (tree *t, int l = -1, int c = -1); |
|
|
722 tree_if_command (tree *e, tree *t, int l = -1, int c = -1); |
|
1
|
723 |
|
|
724 ~tree_if_command (void); |
|
|
725 |
|
191
|
726 tree_if_command *chain (tree *t, int l = -1, int c = -1); |
|
|
727 tree_if_command *chain (tree *t1, tree *t2, int l = -1, int c = -1); |
|
1
|
728 tree_if_command *reverse (void); |
|
|
729 |
|
|
730 tree_constant eval (int print); |
|
|
731 |
|
191
|
732 void eval_error (void); |
|
|
733 |
|
1
|
734 private: |
|
|
735 tree *expr; // Expression to test. |
|
|
736 tree *list; // Commands to execute. |
|
|
737 tree_if_command *next; // Next if command. |
|
|
738 }; |
|
|
739 |
|
|
740 /* |
|
|
741 * Break. |
|
|
742 */ |
|
|
743 class |
|
|
744 tree_break_command : public tree_command |
|
|
745 { |
|
|
746 public: |
|
191
|
747 tree_break_command (int l = -1, int c = -1); |
|
1
|
748 |
|
|
749 ~tree_break_command (void); |
|
|
750 |
|
|
751 tree_constant eval (int print); |
|
|
752 }; |
|
|
753 |
|
|
754 /* |
|
|
755 * Continue. |
|
|
756 */ |
|
|
757 class |
|
|
758 tree_continue_command : public tree_command |
|
|
759 { |
|
|
760 public: |
|
191
|
761 tree_continue_command (int l = -1, int c = -1); |
|
1
|
762 |
|
|
763 ~tree_continue_command (void); |
|
|
764 |
|
|
765 tree_constant eval (int print); |
|
|
766 }; |
|
|
767 |
|
|
768 /* |
|
|
769 * Return. |
|
|
770 */ |
|
|
771 class |
|
|
772 tree_return_command : public tree_command |
|
|
773 { |
|
|
774 public: |
|
191
|
775 tree_return_command (int l = -1, int c = -1); |
|
1
|
776 |
|
|
777 ~tree_return_command (void); |
|
|
778 |
|
|
779 tree_constant eval (int print); |
|
|
780 }; |
|
|
781 |
|
|
782 #endif |
|
|
783 |
|
|
784 /* |
|
|
785 ;;; Local Variables: *** |
|
|
786 ;;; mode: C++ *** |
|
|
787 ;;; page-delimiter: "^/\\*" *** |
|
|
788 ;;; End: *** |
|
|
789 */ |
