Mercurial > hg > octave-nkf
annotate src/pt-id.cc @ 12121:87237a866c71 release-3-2-x
this branch is no longer maintained and is closed for further development
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sat, 22 Jan 2011 01:00:54 -0500 |
| parents | eb63fbe60fab |
| children | c5f03874ea2a |
| rev | line source |
|---|---|
| 2887 | 1 /* |
| 2 | |
| 8920 | 3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2004, 2005, 2006, 2007, |
| 4 2008, 2009 John W. Eaton | |
| 2887 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 2887 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 2887 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 28 #include "error.h" | |
| 29 #include "oct-obj.h" | |
| 2979 | 30 #include "oct-lvalue.h" |
| 2900 | 31 #include "pager.h" |
| 3770 | 32 #include "pt-bp.h" |
| 2887 | 33 #include "pt-const.h" |
| 34 #include "pt-id.h" | |
| 35 #include "pt-walk.h" | |
| 2900 | 36 #include "symtab.h" |
| 2887 | 37 #include "utils.h" |
| 2956 | 38 #include "variables.h" |
| 2887 | 39 |
| 40 // Symbols from the symbol table. | |
| 41 | |
| 42 void | |
| 43 tree_identifier::eval_undefined_error (void) | |
| 44 { | |
| 45 int l = line (); | |
| 46 int c = column (); | |
| 47 | |
| 48 if (l == -1 && c == -1) | |
| 49 ::error ("`%s' undefined", name ().c_str ()); | |
| 50 else | |
| 51 ::error ("`%s' undefined near line %d column %d", | |
| 52 name ().c_str (), l, c); | |
| 53 } | |
| 54 | |
| 55 octave_value_list | |
| 2971 | 56 tree_identifier::rvalue (int nargout) |
| 2887 | 57 { |
| 58 octave_value_list retval; | |
| 59 | |
| 60 if (error_state) | |
| 61 return retval; | |
| 62 | |
| 7336 | 63 octave_value_list evaluated_args; |
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64 bool args_evaluated = false; |
| 2887 | 65 |
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66 octave_value val = xsym().find (0, string_vector (), evaluated_args, |
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67 args_evaluated); |
| 2887 | 68 |
| 7336 | 69 if (val.is_defined ()) |
| 2887 | 70 { |
| 7336 | 71 // GAGME -- this would be cleaner if we required |
| 72 // parens to indicate function calls. | |
| 73 // | |
| 74 // If this identifier refers to a function, we need to know | |
| 75 // whether it is indexed so that we can do the same thing | |
| 76 // for `f' and `f()'. If the index is present, return the | |
| 77 // function object and let tree_index_expression::rvalue | |
| 78 // handle indexing. Otherwise, arrange to call the function | |
| 79 // here, so that we don't return the function definition as | |
| 80 // a value. | |
| 81 | |
| 82 if (val.is_function () && ! is_postfix_indexed ()) | |
| 2887 | 83 { |
| 7336 | 84 octave_value_list tmp_args; |
| 2887 | 85 |
| 7336 | 86 retval = val.do_multi_index_op (nargout, tmp_args); |
| 2887 | 87 } |
| 88 else | |
| 7336 | 89 { |
| 90 if (print_result () && nargout == 0) | |
| 91 val.print_with_name (octave_stdout, name ()); | |
| 92 | |
| 93 retval = val; | |
| 94 } | |
| 2887 | 95 } |
| 7336 | 96 else |
| 97 eval_undefined_error (); | |
| 2887 | 98 |
| 99 return retval; | |
| 100 } | |
| 101 | |
| 2971 | 102 octave_value |
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103 tree_identifier::rvalue1 (int nargout) |
| 2971 | 104 { |
| 105 octave_value retval; | |
| 106 | |
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107 octave_value_list tmp = rvalue (nargout); |
| 2971 | 108 |
| 109 if (! tmp.empty ()) | |
| 110 retval = tmp(0); | |
| 111 | |
| 112 return retval; | |
| 113 } | |
| 114 | |
| 2979 | 115 octave_lvalue |
| 2971 | 116 tree_identifier::lvalue (void) |
| 117 { | |
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118 return octave_lvalue (&(xsym().varref ())); |
| 2971 | 119 } |
| 120 | |
| 5861 | 121 tree_identifier * |
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122 tree_identifier::dup (symbol_table::scope_id sc, |
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123 symbol_table::context_id) const |
| 5861 | 124 { |
| 7336 | 125 // The new tree_identifier object contains a symbol_record |
| 126 // entry from the duplicated scope. | |
| 5861 | 127 |
| 7336 | 128 // FIXME -- is this the best way? |
| 129 symbol_table::symbol_record new_sym | |
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130 = symbol_table::find_symbol (name (), sc); |
| 7336 | 131 |
| 132 tree_identifier *new_id | |
| 133 = new tree_identifier (new_sym, line (), column ()); | |
| 5861 | 134 |
| 135 new_id->copy_base (*this); | |
| 136 | |
| 137 return new_id; | |
| 138 } | |
| 139 | |
| 2887 | 140 void |
| 141 tree_identifier::accept (tree_walker& tw) | |
| 142 { | |
| 143 tw.visit_identifier (*this); | |
| 144 } | |
| 145 | |
| 146 /* | |
| 147 ;;; Local Variables: *** | |
| 148 ;;; mode: C++ *** | |
| 149 ;;; End: *** | |
| 150 */ |