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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) : SLList<tree_statement *> () { } |
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100 tree_statement_list (tree_statement *s) : SLList<tree_statement *> () |
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101 { append (s); } |
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102 |
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103 ~tree_statement_list (void) |
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104 { |
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105 while (! empty ()) |
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106 { |
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107 tree_statement *t = remove_front (); |
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108 delete t; |
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109 } |
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110 } |
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111 |
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112 tree_constant eval (int print); |
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113 |
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114 Octave_object eval (int print, int nargout); |
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115 |
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116 void print_code (ostream& os); |
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117 }; |
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118 |
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119 // Argument lists. Used to hold the list of expressions that are the |
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120 // arguments in a function call or index expression. |
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121 |
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122 class |
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123 tree_argument_list : public SLList<tree_expression *>, public tree_print_code |
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124 { |
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125 public: |
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126 tree_argument_list (void) : SLList<tree_expression *> () { } |
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127 tree_argument_list (tree_expression *t) : SLList<tree_expression *> () |
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128 { append (t); } |
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129 |
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130 ~tree_argument_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_expression *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 Octave_object convert_to_const_vector (void); |
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140 |
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141 void print_code (ostream& os); |
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142 }; |
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143 |
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144 // Parameter lists. Used to hold the list of input and output |
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145 // parameters in a function definition. Elements are identifiers |
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146 // only. |
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147 |
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148 class |
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149 tree_parameter_list : public SLList<tree_identifier *>, public tree_print_code |
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150 { |
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151 public: |
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152 tree_parameter_list (void) : SLList<tree_identifier *> () |
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153 { marked_for_varargs = 0; } |
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154 |
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155 tree_parameter_list (tree_identifier *t) : SLList<tree_identifier *> () |
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156 { |
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157 marked_for_varargs = 0; |
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158 append (t); |
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159 } |
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160 |
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161 ~tree_parameter_list (void) |
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162 { |
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163 while (! empty ()) |
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164 { |
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165 tree_identifier *t = remove_front (); |
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166 delete t; |
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167 } |
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168 } |
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169 |
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170 // char *name (void) const; |
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171 |
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172 void mark_as_formal_parameters (void); |
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173 |
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174 void mark_varargs (void) |
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175 { marked_for_varargs = 1; } |
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176 |
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177 int takes_varargs (void) const |
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178 { return marked_for_varargs; } |
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179 |
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180 void mark_varargs_only (void) |
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181 { marked_for_varargs = -1; } |
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182 |
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183 int varargs_only (void) |
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184 { return (marked_for_varargs < 0); } |
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185 |
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186 void initialize_undefined_elements (tree_constant& val); |
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187 |
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188 void define_from_arg_vector (const Octave_object& args); |
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189 |
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190 int is_defined (void); |
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191 |
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192 Octave_object convert_to_const_vector (tree_va_return_list *vr_list); |
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193 |
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194 void print_code (ostream& os); |
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195 |
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196 private: |
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197 int marked_for_varargs; |
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198 }; |
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199 |
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200 // Return lists. Used to hold the right hand sides of multiple |
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201 // assignment expressions. |
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202 |
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203 class |
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204 tree_return_list : public SLList<tree_index_expression *>, |
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205 public tree_print_code |
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206 { |
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207 public: |
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208 tree_return_list (void) : SLList<tree_index_expression *> () { } |
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209 tree_return_list (tree_index_expression *t) |
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210 : SLList<tree_index_expression *> () |
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211 { append (t); } |
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212 |
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213 ~tree_return_list (void) |
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214 { |
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215 while (! empty ()) |
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216 { |
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217 tree_index_expression *t = remove_front (); |
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218 delete t; |
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219 } |
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220 } |
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221 |
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222 void print_code (ostream& os); |
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223 }; |
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224 |
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225 class |
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226 tree_va_return_list : public SLList<tree_constant> |
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227 { |
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228 public: |
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229 tree_va_return_list (void) : SLList<tree_constant> () { } |
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230 }; |
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231 |
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232 // List of expressions that make up a global statement. |
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233 |
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234 class |
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235 tree_global : public tree_print_code |
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236 { |
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237 public: |
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238 tree_global (void) |
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239 { |
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240 ident = 0; |
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241 assign_expr = 0; |
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242 } |
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243 |
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244 tree_global (tree_identifier *id) |
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245 { |
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246 ident = id; |
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247 assign_expr = 0; |
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248 } |
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249 |
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250 tree_global (tree_simple_assignment_expression *ass) |
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251 { |
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252 ident = 0; |
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253 assign_expr = ass; |
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254 } |
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255 |
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256 ~tree_global (void) |
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257 { |
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258 delete ident; |
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259 delete assign_expr; |
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260 } |
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261 |
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262 void eval (void); |
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263 |
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264 void print_code (ostream& os); |
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265 |
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266 private: |
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267 tree_identifier *ident; |
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268 tree_simple_assignment_expression *assign_expr; |
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269 }; |
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270 |
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271 class |
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272 tree_global_init_list : public SLList<tree_global *>, public tree_print_code |
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273 { |
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274 public: |
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275 tree_global_init_list (void) : SLList<tree_global *> () { } |
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276 tree_global_init_list (tree_global *t) : SLList<tree_global *> () |
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277 { append (t); } |
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278 |
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279 ~tree_global_init_list (void) |
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280 { |
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281 while (! empty ()) |
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282 { |
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283 tree_global *t = remove_front (); |
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284 delete t; |
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285 } |
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286 } |
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287 |
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288 void eval (void); |
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289 |
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290 void print_code (ostream& os); |
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291 }; |
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292 |
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293 class |
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294 tree_if_clause : public tree_print_code |
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295 { |
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296 public: |
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297 tree_if_clause (void) |
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298 { |
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299 expr = 0; |
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300 list = 0; |
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301 } |
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302 |
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303 tree_if_clause (tree_statement_list *l) |
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304 { |
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305 expr = 0; |
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306 list = l; |
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307 } |
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308 |
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309 tree_if_clause (tree_expression *e, tree_statement_list *l) |
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310 { |
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311 expr = e; |
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312 list = l; |
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313 } |
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314 |
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315 ~tree_if_clause (void) |
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316 { |
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317 delete expr; |
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318 delete list; |
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319 } |
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320 |
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321 int is_else_clause (void); |
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322 |
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323 int eval (void); |
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324 |
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325 void print_code (ostream& os); |
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326 |
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327 private: |
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328 tree_expression *expr; |
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329 tree_statement_list *list; |
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330 }; |
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331 |
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332 class |
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333 tree_if_command_list : public SLList<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_command_list (void) : SLList<tree_if_clause *> () { } |
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337 tree_if_command_list (tree_if_clause *t) : SLList<tree_if_clause *> () |
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338 { append (t); } |
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339 |
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340 ~tree_if_command_list (void) |
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341 { |
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342 while (! empty ()) |
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343 { |
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344 tree_if_clause *t = remove_front (); |
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345 delete t; |
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346 } |
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347 } |
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348 |
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349 void eval (void); |
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350 |
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351 void print_code (ostream& os); |
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352 }; |
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353 |
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354 #endif |
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355 |
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356 /* |
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357 ;;; Local Variables: *** |
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358 ;;; mode: C++ *** |
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359 ;;; page-delimiter: "^/\\*" *** |
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360 ;;; End: *** |
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361 */ |
