annotate libinterp/parse-tree/pt-id.cc @ 15195:2fc554ffbc28

split libinterp from src * libinterp: New directory. Move all files from src directory here except Makefile.am, main.cc, main-cli.cc, mkoctfile.in.cc, mkoctfilr.in.sh, octave-config.in.cc, octave-config.in.sh. * libinterp/Makefile.am: New file, extracted from src/Makefile.am. * src/Makefile.am: Delete everything except targets and definitions needed to build and link main and utility programs. * Makefile.am (SUBDIRS): Include libinterp in the list. * autogen.sh: Run config-module.sh in libinterp/dldfcn directory, not src/dldfcn directory. * configure.ac (AC_CONFIG_SRCDIR): Use libinterp/octave.cc, not src/octave.cc. (DL_LDFLAGS, LIBOCTINTERP): Use libinterp, not src. (AC_CONFIG_FILES): Include libinterp/Makefile in the list. * find-docstring-files.sh: Look in libinterp, not src. * gui/src/Makefile.am (liboctgui_la_CPPFLAGS): Find header files in libinterp, not src.
author John W. Eaton <jwe@octave.org>
date Sat, 18 Aug 2012 16:23:39 -0400
parents src/parse-tree/pt-id.cc@46b19589b593
children 44d6ffdf9479
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1 /*
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2
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3 Copyright (C) 1996-2012 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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "error.h"
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28 #include "oct-obj.h"
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29 #include "oct-lvalue.h"
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30 #include "pager.h"
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31 #include "pt-bp.h"
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32 #include "pt-const.h"
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33 #include "pt-id.h"
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34 #include "pt-walk.h"
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35 #include "symtab.h"
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36 #include "utils.h"
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37 #include "variables.h"
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38
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39 // Symbols from the symbol table.
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40
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41 void
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42 tree_identifier::eval_undefined_error (void)
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43 {
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44 int l = line ();
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45 int c = column ();
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46
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47 maybe_missing_function_hook (name ());
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48 if (error_state)
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49 return;
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50
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51 if (l == -1 && c == -1)
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52 ::error_with_id ("Octave:undefined-function",
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53 "`%s' undefined", name ().c_str ());
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54 else
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55 ::error_with_id ("Octave:undefined-function",
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56 "`%s' undefined near line %d column %d",
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57 name ().c_str (), l, c);
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58 }
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59
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60 octave_value_list
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61 tree_identifier::rvalue (int nargout)
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62 {
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63 octave_value_list retval;
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64
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65 if (error_state)
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66 return retval;
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67
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68 octave_value val = sym->find ();
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69
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70 if (val.is_defined ())
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71 {
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72 // GAGME -- this would be cleaner if we required
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73 // parens to indicate function calls.
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74 //
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75 // If this identifier refers to a function, we need to know
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76 // whether it is indexed so that we can do the same thing
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77 // for `f' and `f()'. If the index is present, return the
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78 // function object and let tree_index_expression::rvalue
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79 // handle indexing. Otherwise, arrange to call the function
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80 // here, so that we don't return the function definition as
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81 // a value.
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82
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83 if (val.is_function () && ! is_postfix_indexed ())
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84 {
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85 octave_value_list tmp_args;
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86
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87 retval = val.do_multi_index_op (nargout, tmp_args);
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88 }
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89 else
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90 {
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91 if (print_result () && nargout == 0)
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92 val.print_with_name (octave_stdout, name ());
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93
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94 retval = val;
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95 }
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96 }
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97 else
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98 eval_undefined_error ();
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99
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100 return retval;
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101 }
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102
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103 octave_value
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104 tree_identifier::rvalue1 (int nargout)
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105 {
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106 octave_value retval;
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107
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108 octave_value_list tmp = rvalue (nargout);
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109
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110 if (! tmp.empty ())
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111 retval = tmp(0);
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112
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113 return retval;
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114 }
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115
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116 octave_lvalue
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117 tree_identifier::lvalue (void)
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118 {
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119 return octave_lvalue (&(sym->varref ()));
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120 }
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121
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122 tree_identifier *
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123 tree_identifier::dup (symbol_table::scope_id sc,
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124 symbol_table::context_id) const
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125 {
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126 // The new tree_identifier object contains a symbol_record
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127 // entry from the duplicated scope.
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128
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129 // FIXME -- is this the best way?
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130 symbol_table::symbol_record new_sym
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131 = symbol_table::find_symbol (name (), sc);
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132
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133 tree_identifier *new_id
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134 = new tree_identifier (new_sym, line (), column ());
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135
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136 new_id->copy_base (*this);
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137
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138 return new_id;
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139 }
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140
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141 void
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142 tree_identifier::accept (tree_walker& tw)
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143 {
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144 tw.visit_identifier (*this);
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145 }