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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 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 #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_global; |
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47 class tree_global_init_list; |
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48 |
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49 #include <SLList.h> |
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50 |
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51 #include "tree-base.h" |
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52 #include "tree-expr.h" |
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53 #include "tree-cmd.h" |
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54 |
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55 // A list of expressions and commands to be executed. |
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56 |
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57 class |
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58 tree_statement : public tree_print_code |
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59 { |
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60 friend class tree_statement_list; |
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61 |
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62 public: |
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63 tree_statement (void) |
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64 { |
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65 command = 0; |
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66 expression = 0; |
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67 print_flag = 1; |
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68 } |
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69 |
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70 tree_statement (tree_command *c) |
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71 { |
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72 command = c; |
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73 expression = 0; |
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74 print_flag = 1; |
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75 } |
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76 |
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77 tree_statement (tree_expression *e) |
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78 { |
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79 command = 0; |
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80 expression = e; |
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81 print_flag = 1; |
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82 } |
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83 |
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84 ~tree_statement (void); |
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85 |
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86 void set_print_flag (int print) |
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87 { print_flag = print; } |
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88 |
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89 void print_code (ostream& os); |
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90 |
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91 private: |
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92 tree_command *command; // Command to execute. |
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93 tree_expression *expression; // Command to execute. |
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94 int print_flag; // Print result of eval for this command? |
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95 }; |
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96 |
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97 class |
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98 tree_statement_list : public SLList<tree_statement *>, public tree_print_code |
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99 { |
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100 public: |
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101 tree_statement_list (void) : SLList<tree_statement *> () { } |
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102 tree_statement_list (tree_statement *s) : SLList<tree_statement *> () |
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103 { append (s); } |
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104 |
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105 ~tree_statement_list (void) |
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106 { |
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107 while (! empty ()) |
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108 { |
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109 tree_statement *t = remove_front (); |
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110 delete t; |
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111 } |
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112 } |
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113 |
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114 tree_constant eval (int print); |
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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 tree_parameter_list (tree_identifier *t) : SLList<tree_identifier *> () |
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154 { append (t); } |
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155 |
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156 ~tree_parameter_list (void) |
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157 { |
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158 while (! empty ()) |
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159 { |
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160 tree_identifier *t = remove_front (); |
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161 delete t; |
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162 } |
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163 } |
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164 |
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165 // char *name (void) const; |
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166 |
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167 void mark_as_formal_parameters (void); |
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168 |
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169 void mark_varargs (void) |
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170 { marked_for_varargs = 1; } |
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171 |
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172 int takes_varargs (void) const |
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173 { return marked_for_varargs; } |
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174 |
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175 void mark_varargs_only (void) |
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176 { marked_for_varargs = -1; } |
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177 |
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178 int varargs_only (void) |
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179 { return (marked_for_varargs < 0); } |
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180 |
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181 void define_from_arg_vector (const Octave_object& args); |
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182 |
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183 int is_defined (void); |
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184 |
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185 Octave_object convert_to_const_vector (void); |
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186 |
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187 void print_code (ostream& os); |
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188 |
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189 private: |
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190 int marked_for_varargs; |
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191 }; |
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192 |
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193 // Return lists. Used to hold the right hand sides of multiple |
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194 // assignment expressions. |
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195 |
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196 class |
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197 tree_return_list : public SLList<tree_index_expression *>, |
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198 public tree_print_code |
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199 { |
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200 public: |
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201 tree_return_list (void) : SLList<tree_index_expression *> () { } |
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202 tree_return_list (tree_index_expression *t) |
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203 : SLList<tree_index_expression *> () |
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204 { append (t); } |
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205 |
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206 ~tree_return_list (void) |
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207 { |
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208 while (! empty ()) |
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209 { |
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210 tree_index_expression *t = remove_front (); |
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211 delete t; |
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212 } |
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213 } |
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214 |
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215 void print_code (ostream& os); |
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216 }; |
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217 |
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218 // List of expressions that make up a global statement. |
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219 |
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220 class |
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221 tree_global : public tree_print_code |
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222 { |
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223 public: |
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224 tree_global (void) |
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225 { |
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226 ident = 0; |
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227 assign_expr = 0; |
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228 } |
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229 |
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230 tree_global (tree_identifier *id) |
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231 { |
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232 ident = id; |
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233 assign_expr = 0; |
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234 } |
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235 |
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236 tree_global (tree_simple_assignment_expression *ass) |
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237 { |
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238 ident = 0; |
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239 assign_expr = ass; |
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240 } |
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241 |
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242 ~tree_global (void) |
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243 { |
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244 delete ident; |
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245 delete assign_expr; |
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246 } |
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247 |
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248 void eval (void); |
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249 |
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250 void print_code (ostream& os); |
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251 |
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252 private: |
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253 tree_identifier *ident; |
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254 tree_simple_assignment_expression *assign_expr; |
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255 }; |
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256 |
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257 class |
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258 tree_global_init_list : public SLList<tree_global *>, public tree_print_code |
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259 { |
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260 public: |
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261 tree_global_init_list (void) : SLList<tree_global *> () { } |
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262 tree_global_init_list (tree_global *t) : SLList<tree_global *> () |
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263 { append (t); } |
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264 |
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265 ~tree_global_init_list (void) |
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266 { |
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267 while (! empty ()) |
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268 { |
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269 tree_global *t = remove_front (); |
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270 delete t; |
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271 } |
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272 } |
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273 |
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274 void eval (void); |
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275 |
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276 void print_code (ostream& os); |
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277 }; |
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278 |
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279 class |
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280 tree_if_clause : public tree_print_code |
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281 { |
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282 public: |
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283 tree_if_clause (void) |
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284 { |
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285 expr = 0; |
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286 list = 0; |
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287 } |
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288 |
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289 tree_if_clause (tree_statement_list *l) |
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290 { |
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291 expr = 0; |
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292 list = l; |
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293 } |
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294 |
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295 tree_if_clause (tree_expression *e, tree_statement_list *l) |
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296 { |
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297 expr = e; |
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298 list = l; |
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299 } |
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300 |
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301 ~tree_if_clause (void) |
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302 { |
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303 delete expr; |
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304 delete list; |
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305 } |
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306 |
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307 int eval (void); |
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308 |
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309 void print_code (ostream& os); |
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310 |
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311 private: |
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312 tree_expression *expr; |
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313 tree_statement_list *list; |
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314 }; |
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315 |
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316 class |
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317 tree_if_command_list : public SLList<tree_if_clause *>, public tree_print_code |
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318 { |
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319 public: |
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320 tree_if_command_list (void) : SLList<tree_if_clause *> () { } |
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321 tree_if_command_list (tree_if_clause *t) : SLList<tree_if_clause *> () |
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322 { append (t); } |
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323 |
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324 ~tree_if_command_list (void) |
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325 { |
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326 while (! empty ()) |
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327 { |
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328 tree_if_clause *t = remove_front (); |
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329 delete t; |
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330 } |
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331 } |
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332 |
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333 void eval (void); |
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334 |
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335 void print_code (ostream& os); |
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336 }; |
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337 |
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338 #endif |
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339 |
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340 /* |
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341 ;;; Local Variables: *** |
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342 ;;; mode: C++ *** |
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343 ;;; page-delimiter: "^/\\*" *** |
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344 ;;; End: *** |
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345 */ |
