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update copyright notices
author John W. Eaton <jwe@octave.org>
date Fri, 14 Jan 2011 05:47:45 -0500
parents 2b8531a6a3c9
children 12df7854fa7c
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1 /*
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2
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3 Copyright (C) 1996-2011 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 3 of the License, or (at your
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10 option) any 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, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if !defined (octave_user_function_h)
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24 #define octave_user_function_h 1
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25
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26 #include <ctime>
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27
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28 #include <string>
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29 #include <stack>
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30
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31 #include "comment-list.h"
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32 #include "oct-obj.h"
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33 #include "ov-fcn.h"
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34 #include "ov-typeinfo.h"
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35 #include "symtab.h"
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36 #include "unwind-prot.h"
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37
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38 class string_vector;
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39
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40 class octave_value;
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41 class tree_parameter_list;
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42 class tree_statement_list;
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43 class tree_va_return_list;
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44 class tree_walker;
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45
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46 class
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47 octave_user_code : public octave_function
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48 {
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49 public:
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50 octave_user_code (void)
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51 : octave_function () { }
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52
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53 ~octave_user_code (void) { }
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54
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55 bool is_user_code (void) const { return true; }
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56
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57 virtual tree_statement_list *body (void) = 0;
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58
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59 protected:
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60
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61 octave_user_code (const std::string& nm,
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62 const std::string& ds = std::string ())
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63 : octave_function (nm, ds) { }
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64
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65 private:
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66
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67 // No copying!
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68
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69 octave_user_code (const octave_user_code& f);
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70
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71 octave_user_code& operator = (const octave_user_code& f);
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72 };
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73
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74 // Scripts.
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75
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76 class
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77 octave_user_script : public octave_user_code
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78 {
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79 public:
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80
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81 octave_user_script (void);
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82
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83 octave_user_script (const std::string& fnm, const std::string& nm,
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84 tree_statement_list *cmds,
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85 const std::string& ds = std::string ());
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86
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87 octave_user_script (const std::string& fnm, const std::string& nm,
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88 const std::string& ds = std::string ());
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89
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90 ~octave_user_script (void);
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91
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92 octave_function *function_value (bool = false) { return this; }
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93
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94 octave_user_script *user_script_value (bool = false) { return this; }
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95
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96 octave_user_code *user_code_value (bool = false) { return this; }
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97
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98 // Scripts and user functions are both considered "scripts" because
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99 // they are written in Octave's scripting language.
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100
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101 bool is_user_script (void) const { return true; }
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102
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103 void stash_fcn_file_name (const std::string& nm) { file_name = nm; }
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104
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105 void mark_fcn_file_up_to_date (const octave_time& t) { t_checked = t; }
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106
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107 void stash_fcn_file_time (const octave_time& t)
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108 {
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109 t_parsed = t;
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110 mark_fcn_file_up_to_date (t);
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111 }
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112
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113 std::string fcn_file_name (void) const { return file_name; }
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114
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115 octave_time time_parsed (void) const { return t_parsed; }
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116
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117 octave_time time_checked (void) const { return t_checked; }
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118
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119 octave_value subsref (const std::string& type,
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120 const std::list<octave_value_list>& idx)
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121 {
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122 octave_value_list tmp = subsref (type, idx, 1);
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123 return tmp.length () > 0 ? tmp(0) : octave_value ();
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124 }
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125
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126 octave_value_list subsref (const std::string& type,
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127 const std::list<octave_value_list>& idx,
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128 int nargout);
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129
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130 octave_value_list
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131 do_multi_index_op (int nargout, const octave_value_list& args);
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132
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133 tree_statement_list *body (void) { return cmd_list; }
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134
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135 void accept (tree_walker& tw);
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136
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137 private:
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138
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139 // The list of commands that make up the body of this function.
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140 tree_statement_list *cmd_list;
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141
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142 // The name of the file we parsed.
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143 std::string file_name;
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144
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145 // The time the file was parsed.
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146 octave_time t_parsed;
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147
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148 // The time the file was last checked to see if it needs to be
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149 // parsed again.
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150 octave_time t_checked;
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151
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152 // Used to keep track of recursion depth.
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153 int call_depth;
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154
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155 // No copying!
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156
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157 octave_user_script (const octave_user_script& f);
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158
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159 octave_user_script& operator = (const octave_user_script& f);
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160
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161 DECLARE_OCTAVE_ALLOCATOR
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162
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163 DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
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164 };
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165
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166 // User-defined functions.
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167
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168 class
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169 octave_user_function : public octave_user_code
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170 {
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171 public:
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172
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173 octave_user_function (symbol_table::scope_id sid = -1,
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174 tree_parameter_list *pl = 0,
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175 tree_parameter_list *rl = 0,
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176 tree_statement_list *cl = 0);
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177
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178 ~octave_user_function (void);
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179
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180 octave_function *function_value (bool = false) { return this; }
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181
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182 octave_user_function *user_function_value (bool = false) { return this; }
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183
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184 octave_user_code *user_code_value (bool = false) { return this; }
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185
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186 octave_user_function *define_param_list (tree_parameter_list *t);
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187
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188 octave_user_function *define_ret_list (tree_parameter_list *t);
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189
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190 void stash_fcn_file_name (const std::string& nm);
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191
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192 void stash_parent_fcn_name (const std::string& p) { parent_name = p; }
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193
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194 void stash_parent_fcn_scope (symbol_table::scope_id ps) { parent_scope = ps; }
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195
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196 void stash_leading_comment (octave_comment_list *lc) { lead_comm = lc; }
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197
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198 void stash_trailing_comment (octave_comment_list *tc) { trail_comm = tc; }
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199
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200 void mark_fcn_file_up_to_date (const octave_time& t) { t_checked = t; }
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201
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202 void stash_fcn_file_time (const octave_time& t)
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203 {
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204 t_parsed = t;
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205 mark_fcn_file_up_to_date (t);
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206 }
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207
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208 std::string fcn_file_name (void) const { return file_name; }
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209
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210 std::string parent_fcn_name (void) const { return parent_name; }
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211
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212 symbol_table::scope_id parent_fcn_scope (void) const { return parent_scope; }
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213
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214 symbol_table::scope_id scope (void) { return local_scope; }
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215
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216 octave_time time_parsed (void) const { return t_parsed; }
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217
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218 octave_time time_checked (void) const { return t_checked; }
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219
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220 void mark_as_system_fcn_file (void);
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221
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222 bool is_system_fcn_file (void) const { return system_fcn_file; }
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223
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224 bool is_user_function (void) const { return true; }
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225
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226 void erase_subfunctions (void)
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227 {
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228 symbol_table::erase_subfunctions_in_scope (local_scope);
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229 }
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230
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231 bool takes_varargs (void) const;
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232
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233 bool takes_var_return (void) const;
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234
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235 void mark_as_private_function (const std::string& cname = std::string ())
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236 {
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237 symbol_table::mark_subfunctions_in_scope_as_private (local_scope, cname);
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238
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239 octave_function::mark_as_private_function (cname);
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240 }
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241
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242 void lock_subfunctions (void);
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243
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244 void unlock_subfunctions (void);
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245
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246 octave_value_list all_va_args (const octave_value_list& args);
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247
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248 void stash_function_name (const std::string& s) { my_name = s; }
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249
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250 void mark_as_subfunction (void) { subfunction = true; }
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251
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252 bool is_subfunction (void) const { return subfunction; }
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253
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254 void mark_as_inline_function (void) { inline_function = true; }
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255
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256 bool is_inline_function (void) const { return inline_function; }
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257
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258 void mark_as_class_constructor (void) { class_constructor = true; }
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259
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260 bool is_class_constructor (const std::string& cname = std::string ()) const
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261 {
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262 return class_constructor
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263 ? (cname.empty () ? true : cname == dispatch_class ()) : false;
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264 }
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265
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266 void mark_as_class_method (void) { class_method = true; }
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267
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268 bool is_class_method (const std::string& cname = std::string ()) const
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269 {
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270 return class_method
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271 ? (cname.empty () ? true : cname == dispatch_class ()) : false;
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272 }
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273
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274 octave_value subsref (const std::string& type,
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275 const std::list<octave_value_list>& idx)
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276 {
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277 octave_value_list tmp = subsref (type, idx, 1);
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278 return tmp.length () > 0 ? tmp(0) : octave_value ();
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279 }
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280
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281 octave_value_list subsref (const std::string& type,
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282 const std::list<octave_value_list>& idx,
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283 int nargout);
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284
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285 octave_value_list subsref (const std::string& type,
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286 const std::list<octave_value_list>& idx,
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287 int nargout, const std::list<octave_lvalue>* lvalue_list);
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288
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289 octave_value_list
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290 do_multi_index_op (int nargout, const octave_value_list& args);
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291
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292 octave_value_list
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293 do_multi_index_op (int nargout, const octave_value_list& args,
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294 const std::list<octave_lvalue>* lvalue_list);
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295
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296 tree_parameter_list *parameter_list (void) { return param_list; }
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297
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298 tree_parameter_list *return_list (void) { return ret_list; }
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299
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300 tree_statement_list *body (void) { return cmd_list; }
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301
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302 octave_comment_list *leading_comment (void) { return lead_comm; }
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303
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304 octave_comment_list *trailing_comment (void) { return trail_comm; }
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305
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306 bool subsasgn_optimization_ok (void);
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307
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308 void accept (tree_walker& tw);
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309
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310 template <class T>
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311 bool local_protect (T& variable)
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312 {
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313 if (curr_unwind_protect_frame)
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314 {
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315 curr_unwind_protect_frame->protect_var (variable);
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316 return true;
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317 }
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318 else
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319 return false;
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320 }
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321
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322 #if 0
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323 void print_symtab_info (std::ostream& os) const;
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324 #endif
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325
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326 private:
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327
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328 // List of arguments for this function. These are local variables.
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329 tree_parameter_list *param_list;
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330
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331 // List of parameters we return. These are also local variables in
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332 // this function.
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333 tree_parameter_list *ret_list;
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334
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335 // The list of commands that make up the body of this function.
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336 tree_statement_list *cmd_list;
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337
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338 // The comments preceding the FUNCTION token.
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339 octave_comment_list *lead_comm;
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340
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341 // The comments preceding the ENDFUNCTION token.
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342 octave_comment_list *trail_comm;
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343
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344 // The name of the file we parsed.
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345 std::string file_name;
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346
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347 // The name of the parent function, if any.
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348 std::string parent_name;
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349
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350 // The time the file was parsed.
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351 octave_time t_parsed;
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352
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353 // The time the file was last checked to see if it needs to be
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354 // parsed again.
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355 octave_time t_checked;
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356
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357 // True if this function came from a file that is considered to be a
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358 // system function. This affects whether we check the time stamp
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359 // on the file to see if it has changed.
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360 bool system_fcn_file;
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361
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362 // Used to keep track of recursion depth.
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363 int call_depth;
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364
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365 // The number of arguments that have names.
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366 int num_named_args;
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367
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368 // TRUE means this subfunction of a primary function.
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369 bool subfunction;
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370
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371 // TRUE means this is an inline function.
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372 bool inline_function;
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373
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374 // TRUE means this function is the constructor for class object.
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375 bool class_constructor;
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376
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377 // TRUE means this function is a method for a class.
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378 bool class_method;
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379
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380 // The scope of the parent function, if any.
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381 symbol_table::scope_id parent_scope;
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382
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383 symbol_table::scope_id local_scope;
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384
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385 // pointer to the current unwind_protect frame of this function.
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386 unwind_protect *curr_unwind_protect_frame;
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387
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388 #if 0
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389 // The symbol record for argn in the local symbol table.
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390 octave_value& argn_varref;
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391
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392 // The symbol record for nargin in the local symbol table.
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393 octave_value& nargin_varref;
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394
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395 // The symbol record for nargout in the local symbol table.
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396 octave_value& nargout_varref;
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397
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398 // The symbol record for varargin in the local symbol table.
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399 octave_value& varargin_varref;
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400 #endif
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401
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402 void print_code_function_header (void);
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403
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404 void print_code_function_trailer (void);
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405
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406 void bind_automatic_vars (const string_vector& arg_names, int nargin,
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407 int nargout, const octave_value_list& va_args,
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408 const std::list<octave_lvalue> *lvalue_list);
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409
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410 // No copying!
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diff changeset
411
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412 octave_user_function (const octave_user_function& fn);
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diff changeset
413
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414 octave_user_function& operator = (const octave_user_function& fn);
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diff changeset
415
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416 DECLARE_OCTAVE_ALLOCATOR
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diff changeset
417
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418 DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
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419 };
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420
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421 #endif