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1 // tree-misc.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_tree_misc_h) |
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25 #define octave_tree_misc_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 class ostream; |
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32 class Octave_object; |
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33 class tree_constant; |
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34 class tree_command; |
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35 class tree_expression; |
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36 class tree_simple_assignment_expression; |
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37 class tree_identifier; |
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38 class symbol_record; |
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39 class symbol_table; |
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40 |
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41 class tree_statement; |
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42 class tree_statement_list; |
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43 class tree_argument_list; |
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44 class tree_parameter_list; |
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45 class tree_return_list; |
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46 class tree_va_return_list; |
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47 class tree_global; |
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48 class tree_global_init_list; |
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49 |
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50 #include <SLList.h> |
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51 |
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52 #include "tree-base.h" |
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53 #include "tree-cmd.h" |
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54 #include "tree-const.h" |
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55 #include "tree-expr.h" |
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56 |
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57 // A list of expressions and commands to be executed. |
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58 |
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59 class |
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60 tree_statement : public tree_print_code |
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61 { |
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62 friend class tree_statement_list; |
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63 |
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64 public: |
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65 tree_statement (void) |
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66 { |
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67 command = 0; |
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68 expression = 0; |
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69 print_flag = 1; |
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70 } |
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71 |
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72 tree_statement (tree_command *c) |
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73 { |
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74 command = c; |
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75 expression = 0; |
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76 print_flag = 1; |
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77 } |
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78 |
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79 tree_statement (tree_expression *e) |
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80 { |
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81 command = 0; |
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82 expression = e; |
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83 print_flag = 1; |
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84 } |
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85 |
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86 ~tree_statement (void); |
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87 |
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88 void set_print_flag (int print) |
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89 { print_flag = print; } |
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90 |
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91 int is_command (void) |
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92 { return command != 0; } |
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93 |
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94 int is_expression (void) |
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95 { return expression != 0; } |
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96 |
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97 int line (void) |
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98 { |
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99 return command |
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100 ? command->line () |
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101 : (expression ? expression->line () : -1); |
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102 } |
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103 |
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104 int column (void) |
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105 { |
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106 return command |
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107 ? command->column () |
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108 : (expression ? expression->column () : -1); |
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109 } |
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110 |
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111 void print_code (ostream& os); |
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112 |
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113 private: |
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114 tree_command *command; // Command to execute. |
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115 tree_expression *expression; // Command to execute. |
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116 int print_flag; // Print result of eval for this command? |
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117 }; |
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118 |
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119 class |
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120 tree_statement_list : public SLList<tree_statement *>, public tree_print_code |
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121 { |
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122 public: |
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123 tree_statement_list (void) |
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124 : SLList<tree_statement *> (), tree_print_code () { } |
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125 |
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126 tree_statement_list (tree_statement *s) |
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127 : SLList<tree_statement *> (), tree_print_code () |
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128 { append (s); } |
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129 |
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130 ~tree_statement_list (void) |
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131 { |
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132 while (! empty ()) |
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133 { |
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134 tree_statement *t = remove_front (); |
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135 delete t; |
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136 } |
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137 } |
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138 |
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139 tree_constant eval (int print); |
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140 |
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141 Octave_object eval (int print, int nargout); |
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142 |
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143 void print_code (ostream& os); |
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144 }; |
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145 |
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146 // Argument lists. Used to hold the list of expressions that are the |
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147 // arguments in a function call or index expression. |
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148 |
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149 class |
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150 tree_argument_list : public SLList<tree_expression *>, public tree_print_code |
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151 { |
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152 public: |
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153 tree_argument_list (void) |
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154 : SLList<tree_expression *> (), tree_print_code () { } |
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155 |
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156 tree_argument_list (tree_expression *t) |
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157 : SLList<tree_expression *> (), tree_print_code () |
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158 { append (t); } |
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159 |
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160 ~tree_argument_list (void) |
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161 { |
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162 while (! empty ()) |
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163 { |
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164 tree_expression *t = remove_front (); |
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165 delete t; |
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166 } |
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167 } |
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168 |
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169 Octave_object convert_to_const_vector (void); |
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170 |
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171 void print_code (ostream& os); |
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172 }; |
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173 |
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174 // Parameter lists. Used to hold the list of input and output |
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175 // parameters in a function definition. Elements are identifiers |
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176 // only. |
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177 |
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178 class |
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179 tree_parameter_list : public SLList<tree_identifier *>, public tree_print_code |
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180 { |
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181 public: |
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182 tree_parameter_list (void) |
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183 : SLList<tree_identifier *> (), tree_print_code () |
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184 { marked_for_varargs = 0; } |
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185 |
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186 tree_parameter_list (tree_identifier *t) |
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187 : SLList<tree_identifier *> (), tree_print_code () |
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188 { |
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189 marked_for_varargs = 0; |
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190 append (t); |
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191 } |
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192 |
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193 ~tree_parameter_list (void) |
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194 { |
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195 while (! empty ()) |
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196 { |
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197 tree_identifier *t = remove_front (); |
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198 delete t; |
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199 } |
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200 } |
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201 |
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202 // char *name (void) const; |
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203 |
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204 void mark_as_formal_parameters (void); |
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205 |
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206 void mark_varargs (void) |
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207 { marked_for_varargs = 1; } |
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208 |
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209 int takes_varargs (void) const |
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210 { return marked_for_varargs; } |
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211 |
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212 void mark_varargs_only (void) |
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213 { marked_for_varargs = -1; } |
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214 |
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215 int varargs_only (void) |
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216 { return (marked_for_varargs < 0); } |
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217 |
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218 void initialize_undefined_elements (tree_constant& val); |
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219 |
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220 void define_from_arg_vector (const Octave_object& args); |
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221 |
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222 int is_defined (void); |
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223 |
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224 Octave_object convert_to_const_vector (tree_va_return_list *vr_list); |
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225 |
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226 void print_code (ostream& os); |
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227 |
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228 private: |
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229 int marked_for_varargs; |
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230 }; |
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231 |
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232 // Return lists. Used to hold the right hand sides of multiple |
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233 // assignment expressions. |
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234 |
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235 class |
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236 tree_return_list : public SLList<tree_index_expression *>, |
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237 public tree_print_code |
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238 { |
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239 public: |
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240 tree_return_list (void) |
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241 : SLList<tree_index_expression *> (), tree_print_code () { } |
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242 |
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243 tree_return_list (tree_index_expression *t) |
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244 : SLList<tree_index_expression *> (), tree_print_code () |
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245 { append (t); } |
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246 |
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247 ~tree_return_list (void) |
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248 { |
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249 while (! empty ()) |
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250 { |
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251 tree_index_expression *t = remove_front (); |
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252 delete t; |
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253 } |
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254 } |
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255 |
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256 void print_code (ostream& os); |
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257 }; |
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258 |
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259 class |
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260 tree_va_return_list : public SLList<tree_constant> |
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261 { |
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262 public: |
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263 tree_va_return_list (void) : SLList<tree_constant> () { } |
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264 |
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265 ~tree_va_return_list (void) { } |
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266 }; |
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267 |
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268 // List of expressions that make up a global statement. |
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269 |
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270 class |
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271 tree_global : public tree_print_code |
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272 { |
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273 public: |
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274 tree_global (void) |
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275 { |
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276 ident = 0; |
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277 assign_expr = 0; |
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278 } |
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279 |
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280 tree_global (tree_identifier *id) |
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281 { |
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282 ident = id; |
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283 assign_expr = 0; |
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284 } |
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285 |
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286 tree_global (tree_simple_assignment_expression *ass) |
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287 { |
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288 ident = 0; |
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289 assign_expr = ass; |
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290 } |
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291 |
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292 ~tree_global (void) |
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293 { |
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294 delete ident; |
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295 delete assign_expr; |
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296 } |
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297 |
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298 void eval (void); |
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299 |
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300 void print_code (ostream& os); |
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301 |
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302 private: |
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303 tree_identifier *ident; |
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304 tree_simple_assignment_expression *assign_expr; |
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305 }; |
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306 |
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307 class |
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308 tree_global_init_list : public SLList<tree_global *>, public tree_print_code |
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309 { |
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310 public: |
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311 tree_global_init_list (void) |
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312 : SLList<tree_global *> (), tree_print_code () { } |
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313 |
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314 tree_global_init_list (tree_global *t) |
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315 : SLList<tree_global *> (), tree_print_code () |
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316 { append (t); } |
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317 |
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318 ~tree_global_init_list (void) |
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319 { |
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320 while (! empty ()) |
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321 { |
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322 tree_global *t = remove_front (); |
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323 delete t; |
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324 } |
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325 } |
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326 |
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327 void eval (void); |
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328 |
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329 void print_code (ostream& os); |
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330 }; |
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331 |
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332 class |
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333 tree_if_clause : public tree_print_code |
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334 { |
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335 public: |
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336 tree_if_clause (void) : tree_print_code () |
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337 { |
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338 expr = 0; |
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339 list = 0; |
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340 } |
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341 |
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342 tree_if_clause (tree_statement_list *l) : tree_print_code () |
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343 { |
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344 expr = 0; |
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345 list = l; |
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346 } |
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347 |
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348 tree_if_clause (tree_expression *e, tree_statement_list *l) |
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349 : tree_print_code () |
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350 { |
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351 expr = e; |
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352 list = l; |
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353 } |
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354 |
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355 ~tree_if_clause (void) |
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356 { |
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357 delete expr; |
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358 delete list; |
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359 } |
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360 |
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361 int is_else_clause (void) |
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362 { |
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363 return ! expr; |
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364 } |
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365 |
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366 int eval (void); |
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367 |
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368 void print_code (ostream& os); |
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369 |
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370 private: |
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371 tree_expression *expr; |
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372 tree_statement_list *list; |
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373 }; |
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374 |
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375 class |
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376 tree_if_command_list : public SLList<tree_if_clause *>, public tree_print_code |
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377 { |
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378 public: |
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379 tree_if_command_list (void) |
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380 : SLList<tree_if_clause *> (), tree_print_code () { } |
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381 |
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382 tree_if_command_list (tree_if_clause *t) |
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383 : SLList<tree_if_clause *> (), tree_print_code () |
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384 { append (t); } |
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385 |
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386 ~tree_if_command_list (void) |
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387 { |
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388 while (! empty ()) |
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389 { |
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390 tree_if_clause *t = remove_front (); |
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391 delete t; |
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392 } |
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393 } |
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394 |
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395 void eval (void); |
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396 |
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397 void print_code (ostream& os); |
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398 }; |
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399 |
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400 #endif |
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401 |
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402 /* |
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403 ;;; Local Variables: *** |
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404 ;;; mode: C++ *** |
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405 ;;; page-delimiter: "^/\\*" *** |
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406 ;;; End: *** |
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407 */ |
