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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, 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_misc_h) |
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25 #define octave_tree_misc_h 1 |
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26 |
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27 class ostream; |
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28 class Octave_object; |
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29 class tree_constant; |
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30 class tree_command; |
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31 class tree_expression; |
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32 class tree_simple_assignment_expression; |
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33 class tree_identifier; |
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34 class symbol_record; |
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35 class symbol_table; |
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36 |
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37 class tree_statement; |
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38 class tree_statement_list; |
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39 class tree_argument_list; |
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40 class tree_parameter_list; |
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41 class tree_return_list; |
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42 class tree_va_return_list; |
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43 class tree_global; |
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44 class tree_global_init_list; |
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45 |
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46 #include <SLList.h> |
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47 |
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48 #include "tree-base.h" |
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49 #include "tree-expr.h" |
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50 #include "tree-const.h" |
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51 #include "tree-cmd.h" |
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52 |
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53 // A list of expressions and commands to be executed. |
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54 |
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55 class |
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56 tree_statement : public tree_print_code |
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57 { |
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58 friend class tree_statement_list; |
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59 |
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60 public: |
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61 tree_statement (void) |
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62 { |
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63 command = 0; |
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64 expression = 0; |
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65 print_flag = 1; |
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66 } |
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67 |
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68 tree_statement (tree_command *c) |
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69 { |
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70 command = c; |
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71 expression = 0; |
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72 print_flag = 1; |
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73 } |
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74 |
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75 tree_statement (tree_expression *e) |
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76 { |
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77 command = 0; |
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78 expression = e; |
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79 print_flag = 1; |
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80 } |
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81 |
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82 ~tree_statement (void); |
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83 |
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84 void set_print_flag (int print) |
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85 { print_flag = print; } |
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86 |
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87 void print_code (ostream& os); |
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88 |
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89 private: |
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90 tree_command *command; // Command to execute. |
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91 tree_expression *expression; // Command to execute. |
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92 int print_flag; // Print result of eval for this command? |
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93 }; |
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94 |
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95 class |
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96 tree_statement_list : public SLList<tree_statement *>, public tree_print_code |
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97 { |
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98 public: |
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99 tree_statement_list (void) |
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100 : SLList<tree_statement *> (), tree_print_code () { } |
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101 |
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102 tree_statement_list (tree_statement *s) |
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103 : SLList<tree_statement *> (), tree_print_code () |
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104 { append (s); } |
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105 |
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106 ~tree_statement_list (void) |
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107 { |
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108 while (! empty ()) |
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109 { |
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110 tree_statement *t = remove_front (); |
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111 delete t; |
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112 } |
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113 } |
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114 |
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115 tree_constant eval (int print); |
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116 |
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117 Octave_object eval (int print, int nargout); |
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118 |
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119 void print_code (ostream& os); |
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120 }; |
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121 |
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122 // Argument lists. Used to hold the list of expressions that are the |
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123 // arguments in a function call or index expression. |
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124 |
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125 class |
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126 tree_argument_list : public SLList<tree_expression *>, public tree_print_code |
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127 { |
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128 public: |
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129 tree_argument_list (void) |
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130 : SLList<tree_expression *> (), tree_print_code () { } |
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131 |
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132 tree_argument_list (tree_expression *t) |
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133 : SLList<tree_expression *> (), tree_print_code () |
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134 { append (t); } |
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135 |
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136 ~tree_argument_list (void) |
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137 { |
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138 while (! empty ()) |
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139 { |
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140 tree_expression *t = remove_front (); |
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141 delete t; |
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142 } |
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143 } |
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144 |
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145 Octave_object convert_to_const_vector (void); |
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146 |
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147 void print_code (ostream& os); |
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148 }; |
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149 |
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150 // Parameter lists. Used to hold the list of input and output |
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151 // parameters in a function definition. Elements are identifiers |
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152 // only. |
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153 |
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154 class |
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155 tree_parameter_list : public SLList<tree_identifier *>, public tree_print_code |
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156 { |
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157 public: |
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158 tree_parameter_list (void) |
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159 : SLList<tree_identifier *> (), tree_print_code () |
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160 { marked_for_varargs = 0; } |
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161 |
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162 tree_parameter_list (tree_identifier *t) |
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163 : SLList<tree_identifier *> (), tree_print_code () |
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164 { |
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165 marked_for_varargs = 0; |
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166 append (t); |
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167 } |
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168 |
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169 ~tree_parameter_list (void) |
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170 { |
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171 while (! empty ()) |
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172 { |
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173 tree_identifier *t = remove_front (); |
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174 delete t; |
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175 } |
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176 } |
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177 |
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178 // char *name (void) const; |
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179 |
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180 void mark_as_formal_parameters (void); |
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181 |
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182 void mark_varargs (void) |
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183 { marked_for_varargs = 1; } |
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184 |
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185 int takes_varargs (void) const |
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186 { return marked_for_varargs; } |
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187 |
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188 void mark_varargs_only (void) |
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189 { marked_for_varargs = -1; } |
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190 |
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191 int varargs_only (void) |
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192 { return (marked_for_varargs < 0); } |
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193 |
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194 void initialize_undefined_elements (tree_constant& val); |
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195 |
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196 void define_from_arg_vector (const Octave_object& args); |
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197 |
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198 int is_defined (void); |
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199 |
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200 Octave_object convert_to_const_vector (tree_va_return_list *vr_list); |
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201 |
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202 void print_code (ostream& os); |
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203 |
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204 private: |
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205 int marked_for_varargs; |
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206 }; |
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207 |
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208 // Return lists. Used to hold the right hand sides of multiple |
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209 // assignment expressions. |
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210 |
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211 class |
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212 tree_return_list : public SLList<tree_index_expression *>, |
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213 public tree_print_code |
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214 { |
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215 public: |
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216 tree_return_list (void) |
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217 : SLList<tree_index_expression *> (), tree_print_code () { } |
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218 |
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219 tree_return_list (tree_index_expression *t) |
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220 : SLList<tree_index_expression *> (), tree_print_code () |
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221 { append (t); } |
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222 |
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223 ~tree_return_list (void) |
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224 { |
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225 while (! empty ()) |
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226 { |
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227 tree_index_expression *t = remove_front (); |
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228 delete t; |
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229 } |
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230 } |
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231 |
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232 void print_code (ostream& os); |
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233 }; |
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234 |
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235 class |
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236 tree_va_return_list : public SLList<tree_constant> |
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237 { |
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238 public: |
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239 tree_va_return_list (void) : SLList<tree_constant> () { } |
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240 }; |
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241 |
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242 // List of expressions that make up a global statement. |
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243 |
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244 class |
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245 tree_global : public tree_print_code |
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246 { |
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247 public: |
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248 tree_global (void) |
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249 { |
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250 ident = 0; |
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251 assign_expr = 0; |
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252 } |
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253 |
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254 tree_global (tree_identifier *id) |
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255 { |
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256 ident = id; |
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257 assign_expr = 0; |
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258 } |
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259 |
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260 tree_global (tree_simple_assignment_expression *ass) |
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261 { |
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262 ident = 0; |
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263 assign_expr = ass; |
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264 } |
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265 |
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266 ~tree_global (void) |
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267 { |
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268 delete ident; |
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269 delete assign_expr; |
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270 } |
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271 |
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272 void eval (void); |
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273 |
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274 void print_code (ostream& os); |
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275 |
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276 private: |
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277 tree_identifier *ident; |
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278 tree_simple_assignment_expression *assign_expr; |
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279 }; |
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280 |
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281 class |
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282 tree_global_init_list : public SLList<tree_global *>, public tree_print_code |
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283 { |
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284 public: |
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285 tree_global_init_list (void) |
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286 : SLList<tree_global *> (), tree_print_code () { } |
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287 |
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288 tree_global_init_list (tree_global *t) |
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289 : SLList<tree_global *> (), tree_print_code () |
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290 { append (t); } |
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291 |
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292 ~tree_global_init_list (void) |
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293 { |
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294 while (! empty ()) |
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295 { |
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296 tree_global *t = remove_front (); |
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297 delete t; |
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298 } |
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299 } |
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300 |
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301 void eval (void); |
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302 |
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303 void print_code (ostream& os); |
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304 }; |
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305 |
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306 class |
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307 tree_if_clause : public tree_print_code |
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308 { |
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309 public: |
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310 tree_if_clause (void) |
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311 { |
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312 expr = 0; |
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313 list = 0; |
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314 } |
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315 |
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316 tree_if_clause (tree_statement_list *l) |
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317 { |
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318 expr = 0; |
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319 list = l; |
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320 } |
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321 |
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322 tree_if_clause (tree_expression *e, tree_statement_list *l) |
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323 { |
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324 expr = e; |
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325 list = l; |
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326 } |
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327 |
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328 ~tree_if_clause (void) |
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329 { |
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330 delete expr; |
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331 delete list; |
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332 } |
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333 |
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334 int is_else_clause (void); |
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335 |
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336 int eval (void); |
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337 |
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338 void print_code (ostream& os); |
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339 |
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340 private: |
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341 tree_expression *expr; |
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342 tree_statement_list *list; |
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343 }; |
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344 |
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345 class |
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346 tree_if_command_list : public SLList<tree_if_clause *>, public tree_print_code |
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347 { |
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348 public: |
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349 tree_if_command_list (void) |
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350 : SLList<tree_if_clause *> (), tree_print_code () { } |
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351 |
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352 tree_if_command_list (tree_if_clause *t) |
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353 : SLList<tree_if_clause *> (), tree_print_code () |
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354 { append (t); } |
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355 |
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356 ~tree_if_command_list (void) |
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357 { |
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358 while (! empty ()) |
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359 { |
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360 tree_if_clause *t = remove_front (); |
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361 delete t; |
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362 } |
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363 } |
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364 |
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365 void eval (void); |
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366 |
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367 void print_code (ostream& os); |
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368 }; |
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369 |
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370 #endif |
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371 |
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372 /* |
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373 ;;; Local Variables: *** |
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374 ;;; mode: C++ *** |
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375 ;;; page-delimiter: "^/\\*" *** |
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376 ;;; End: *** |
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377 */ |
