Mercurial > hg > octave-nkf
annotate src/pt-id.cc @ 7752:40c428ea3408
initial implementation of dbup and dbdown
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Sun, 04 May 2008 03:42:19 -0400 |
| parents | 745a8299c2b5 |
| children | e76a4a6e3c47 |
| rev | line source |
|---|---|
| 2887 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2000, 2001, 2002, 2004, 2005, 2006, 2007 |
| 4 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 | |
| 3770 | 60 MAYBE_DO_BREAKPOINT; |
| 61 | |
| 2887 | 62 if (error_state) |
| 63 return retval; | |
| 64 | |
| 7336 | 65 octave_value_list evaluated_args; |
| 66 bool args_evaluated; | |
| 2887 | 67 |
|
7752
40c428ea3408
initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
68 octave_value val = xsym().find (0, string_vector (), evaluated_args, |
|
40c428ea3408
initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
69 args_evaluated); |
| 2887 | 70 |
| 7336 | 71 if (val.is_defined ()) |
| 2887 | 72 { |
| 7336 | 73 // GAGME -- this would be cleaner if we required |
| 74 // parens to indicate function calls. | |
| 75 // | |
| 76 // If this identifier refers to a function, we need to know | |
| 77 // whether it is indexed so that we can do the same thing | |
| 78 // for `f' and `f()'. If the index is present, return the | |
| 79 // function object and let tree_index_expression::rvalue | |
| 80 // handle indexing. Otherwise, arrange to call the function | |
| 81 // here, so that we don't return the function definition as | |
| 82 // a value. | |
| 83 | |
| 84 if (val.is_function () && ! is_postfix_indexed ()) | |
| 2887 | 85 { |
| 7336 | 86 octave_value_list tmp_args; |
| 2887 | 87 |
| 7336 | 88 retval = val.do_multi_index_op (nargout, tmp_args); |
| 2887 | 89 } |
| 90 else | |
| 7336 | 91 { |
| 92 if (print_result () && nargout == 0) | |
| 93 val.print_with_name (octave_stdout, name ()); | |
| 94 | |
| 95 retval = val; | |
| 96 } | |
| 2887 | 97 } |
| 7336 | 98 else |
| 99 eval_undefined_error (); | |
| 2887 | 100 |
| 101 return retval; | |
| 102 } | |
| 103 | |
| 2971 | 104 octave_value |
| 105 tree_identifier::rvalue (void) | |
| 106 { | |
| 107 octave_value retval; | |
| 108 | |
| 109 octave_value_list tmp = rvalue (1); | |
| 110 | |
| 111 if (! tmp.empty ()) | |
| 112 retval = tmp(0); | |
| 113 | |
| 114 return retval; | |
| 115 } | |
| 116 | |
| 2979 | 117 octave_lvalue |
| 2971 | 118 tree_identifier::lvalue (void) |
| 119 { | |
| 3770 | 120 MAYBE_DO_BREAKPOINT; |
| 121 | |
|
7752
40c428ea3408
initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
122 return octave_lvalue (&(xsym().varref ())); |
| 2971 | 123 } |
| 124 | |
| 5861 | 125 tree_identifier * |
| 7336 | 126 tree_identifier::dup (symbol_table::scope_id scope) |
| 5861 | 127 { |
| 7336 | 128 // The new tree_identifier object contains a symbol_record |
| 129 // entry from the duplicated scope. | |
| 5861 | 130 |
| 7336 | 131 // FIXME -- is this the best way? |
| 132 symbol_table::symbol_record new_sym | |
|
7752
40c428ea3408
initial implementation of dbup and dbdown
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
133 = symbol_table::find_symbol (xsym().name (), scope); |
| 7336 | 134 |
| 135 tree_identifier *new_id | |
| 136 = new tree_identifier (new_sym, line (), column ()); | |
| 5861 | 137 |
| 138 new_id->copy_base (*this); | |
| 139 | |
| 140 return new_id; | |
| 141 } | |
| 142 | |
| 2887 | 143 void |
| 144 tree_identifier::accept (tree_walker& tw) | |
| 145 { | |
| 146 tw.visit_identifier (*this); | |
| 147 } | |
| 148 | |
| 149 /* | |
| 150 ;;; Local Variables: *** | |
| 151 ;;; mode: C++ *** | |
| 152 ;;; End: *** | |
| 153 */ |