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1 /* |
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2 |
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_tree_fcn_h) |
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24 #define octave_tree_fcn_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <ctime> |
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31 |
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32 class ostream; |
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33 |
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34 #include <string> |
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35 |
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36 class tree_parameter_list; |
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37 class tree_statement_list; |
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38 class tree_va_return_list; |
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39 |
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40 class tree_walker; |
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41 |
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42 #include "oct-obj.h" |
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43 #include "symtab.h" |
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44 #include "pt-fvc.h" |
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45 |
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46 // User defined functions. |
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47 |
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48 class |
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49 tree_function : public tree_fvc |
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50 { |
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51 public: |
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52 |
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53 tree_function (int l = -1, int c = -1) : tree_fvc (l, c) |
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54 { init (); } |
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55 |
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56 tree_function (tree_statement_list *cl, symbol_table *st, |
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57 int l = -1, int c = -1) |
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58 : tree_fvc (l, c) |
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59 { |
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60 init (); |
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61 sym_tab = st; |
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62 cmd_list = cl; |
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63 install_nargin_and_nargout (); |
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64 } |
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65 |
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66 ~tree_function (void); |
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67 |
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68 // tree_function *define (tree_statement_list *t); |
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69 tree_function *define_param_list (tree_parameter_list *t); |
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70 tree_function *define_ret_list (tree_parameter_list *t); |
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71 |
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72 void stash_fcn_file_name (void); |
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73 |
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74 void stash_fcn_file_time (time_t t) |
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75 { t_parsed = t; } |
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76 |
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77 string fcn_file_name (void) |
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78 { return file_name; } |
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79 |
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80 time_t time_parsed (void) |
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81 { return t_parsed; } |
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82 |
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83 void mark_as_system_fcn_file (void); |
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84 |
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85 bool is_system_fcn_file (void) const |
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86 { return system_fcn_file; } |
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87 |
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88 bool takes_varargs (void) const; |
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89 |
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90 void octave_va_start (void) |
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91 { curr_va_arg_number = num_named_args; } |
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92 |
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93 octave_value octave_va_arg (void); |
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94 |
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95 octave_value_list octave_all_va_args (void); |
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96 |
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97 bool takes_var_return (void) const; |
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98 |
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99 void octave_vr_val (const octave_value& val); |
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100 |
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101 void stash_function_name (const string& s); |
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102 |
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103 string function_name (void) |
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104 { return fcn_name; } |
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105 |
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106 octave_value eval (bool print); |
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107 |
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108 octave_value_list eval (bool print, int nargout, const octave_value_list& args); |
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109 |
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110 void traceback_error (void); |
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111 |
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112 tree_parameter_list *parameter_list (void) { return param_list; } |
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113 |
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114 tree_parameter_list *return_list (void) { return ret_list; } |
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115 |
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116 tree_statement_list *body (void) { return cmd_list; } |
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117 |
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118 void accept (tree_walker& tw); |
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119 |
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120 private: |
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121 |
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122 // List of arguments for this function. These are local variables. |
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123 tree_parameter_list *param_list; |
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124 |
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125 // List of parameters we return. These are also local variables in |
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126 // this function. |
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127 tree_parameter_list *ret_list; |
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128 |
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129 // The list of commands that make up the body of this function. |
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130 tree_statement_list *cmd_list; |
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131 |
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132 // The local symbol table for this function. |
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133 symbol_table *sym_tab; |
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134 |
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135 // Used to keep track of recursion depth. |
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136 int call_depth; |
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137 |
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138 // The name of the file we parsed |
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139 string file_name; |
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140 |
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141 // The name of the function. |
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142 string fcn_name; |
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143 |
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144 // The time the file was parsed. |
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145 time_t t_parsed; |
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146 |
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147 // True if this function came from a file that is considered to be a |
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148 // system function. This affects whether we check the time stamp |
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149 // on the file to see if it has changed. |
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150 bool system_fcn_file; |
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151 |
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152 // The number of arguments that have names. |
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153 int num_named_args; |
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154 |
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155 // The values that were passed as arguments. |
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156 octave_value_list args_passed; |
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157 |
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158 // The number of arguments passed in. |
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159 int num_args_passed; |
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160 |
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161 // Used to keep track of the current offset into the list of va_args. |
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162 int curr_va_arg_number; |
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163 |
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164 // The list of return values when an unspecified number can be |
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165 // returned. |
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166 tree_va_return_list *vr_list; |
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167 |
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168 // The symbol record for nargin in the local symbol table. |
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169 symbol_record *nargin_sr; |
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170 |
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171 // The symbol record for nargout in the local symbol table. |
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172 symbol_record *nargout_sr; |
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173 |
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174 void print_code_function_header (void); |
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175 void print_code_function_trailer (void); |
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176 |
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177 void install_nargin_and_nargout (void); |
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178 |
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179 void bind_nargin_and_nargout (int nargin, int nargout); |
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180 |
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181 void init (void) |
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182 { |
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183 call_depth = 0; |
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184 param_list = 0; |
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185 ret_list = 0; |
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186 sym_tab = 0; |
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187 cmd_list = 0; |
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188 t_parsed = 0; |
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189 system_fcn_file = 0; |
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190 num_named_args = 0; |
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191 num_args_passed = 0; |
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192 curr_va_arg_number = 0; |
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193 vr_list = 0; |
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194 } |
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195 }; |
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196 |
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197 extern void symbols_of_pt_fcn (void); |
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198 |
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199 #endif |
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200 |
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201 /* |
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202 ;;; Local Variables: *** |
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203 ;;; mode: C++ *** |
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204 ;;; End: *** |
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205 */ |
