Mercurial > hg > octave-lyh
annotate src/pt-id.cc @ 14138:72c96de7a403 stable
maint: update copyright notices for 2012
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 02 Jan 2012 14:25:41 -0500 |
| parents | fd0a3ac60b0e |
| children | 460a3c6d8bf1 3d3c002ccc60 d174210ce1ec |
| rev | line source |
|---|---|
| 2887 | 1 /* |
| 2 | |
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3 Copyright (C) 1996-2012 John W. Eaton |
| 2887 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 2887 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 2887 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
| 27 #include "error.h" | |
| 28 #include "oct-obj.h" | |
| 2979 | 29 #include "oct-lvalue.h" |
| 2900 | 30 #include "pager.h" |
| 3770 | 31 #include "pt-bp.h" |
| 2887 | 32 #include "pt-const.h" |
| 33 #include "pt-id.h" | |
| 34 #include "pt-walk.h" | |
| 2900 | 35 #include "symtab.h" |
| 2887 | 36 #include "utils.h" |
| 2956 | 37 #include "variables.h" |
| 2887 | 38 |
| 39 // Symbols from the symbol table. | |
| 40 | |
| 41 void | |
| 42 tree_identifier::eval_undefined_error (void) | |
| 43 { | |
| 44 int l = line (); | |
| 45 int c = column (); | |
| 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 |
| 2887 | 51 if (l == -1 && c == -1) |
| 52 ::error ("`%s' undefined", name ().c_str ()); | |
| 53 else | |
| 54 ::error ("`%s' undefined near line %d column %d", | |
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55 name ().c_str (), l, c); |
| 2887 | 56 } |
| 57 | |
| 58 octave_value_list | |
| 2971 | 59 tree_identifier::rvalue (int nargout) |
| 2887 | 60 { |
| 61 octave_value_list retval; | |
| 62 | |
| 63 if (error_state) | |
| 64 return retval; | |
| 65 | |
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66 octave_value val = xsym ().find (); |
| 2887 | 67 |
| 7336 | 68 if (val.is_defined ()) |
| 2887 | 69 { |
| 7336 | 70 // GAGME -- this would be cleaner if we required |
| 71 // parens to indicate function calls. | |
| 72 // | |
| 73 // If this identifier refers to a function, we need to know | |
| 74 // whether it is indexed so that we can do the same thing | |
| 75 // for `f' and `f()'. If the index is present, return the | |
| 76 // function object and let tree_index_expression::rvalue | |
| 77 // handle indexing. Otherwise, arrange to call the function | |
| 78 // here, so that we don't return the function definition as | |
| 79 // a value. | |
| 80 | |
| 81 if (val.is_function () && ! is_postfix_indexed ()) | |
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82 { |
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83 octave_value_list tmp_args; |
| 2887 | 84 |
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85 retval = val.do_multi_index_op (nargout, tmp_args); |
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86 } |
| 2887 | 87 else |
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88 { |
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89 if (print_result () && nargout == 0) |
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90 val.print_with_name (octave_stdout, name ()); |
| 7336 | 91 |
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92 retval = val; |
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93 } |
| 2887 | 94 } |
| 7336 | 95 else |
| 96 eval_undefined_error (); | |
| 2887 | 97 |
| 98 return retval; | |
| 99 } | |
| 100 | |
| 2971 | 101 octave_value |
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102 tree_identifier::rvalue1 (int nargout) |
| 2971 | 103 { |
| 104 octave_value retval; | |
| 105 | |
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106 octave_value_list tmp = rvalue (nargout); |
| 2971 | 107 |
| 108 if (! tmp.empty ()) | |
| 109 retval = tmp(0); | |
| 110 | |
| 111 return retval; | |
| 112 } | |
| 113 | |
| 2979 | 114 octave_lvalue |
| 2971 | 115 tree_identifier::lvalue (void) |
| 116 { | |
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117 return octave_lvalue (&(xsym().varref ())); |
| 2971 | 118 } |
| 119 | |
| 5861 | 120 tree_identifier * |
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121 tree_identifier::dup (symbol_table::scope_id sc, |
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122 symbol_table::context_id) const |
| 5861 | 123 { |
| 7336 | 124 // The new tree_identifier object contains a symbol_record |
| 125 // entry from the duplicated scope. | |
| 5861 | 126 |
| 7336 | 127 // FIXME -- is this the best way? |
| 128 symbol_table::symbol_record new_sym | |
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129 = symbol_table::find_symbol (name (), sc); |
| 7336 | 130 |
| 131 tree_identifier *new_id | |
| 132 = new tree_identifier (new_sym, line (), column ()); | |
| 5861 | 133 |
| 134 new_id->copy_base (*this); | |
| 135 | |
| 136 return new_id; | |
| 137 } | |
| 138 | |
| 2887 | 139 void |
| 140 tree_identifier::accept (tree_walker& tw) | |
| 141 { | |
| 142 tw.visit_identifier (*this); | |
| 143 } |