Mercurial > octave
annotate libinterp/parse-tree/pt-const.h @ 27923:bd51beb6205e
update formatting of copyright notices
* Use <https://octave.org/copyright/> instead of
<https://octave.org/COPYRIGHT.html/>.
* For consistency with other comments in the Octave sources, use
C++-style comments for copyright blocks in C and C++ files.
* Use delimiters above and below copyright blocks that are appropriate
for the language used in the file.
* Eliminate extra spacing inside copyright blocks.
* lex.ll (looks_like_copyright): Also allow newlines and carriage
returns before the word "Copyright".
* scripts/mk-doc.pl (gethelp): Also skip empty comment lines.
* bp-table.cc, type.m: Adjust tests.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 08 Jan 2020 11:59:41 -0500 |
parents | 1891570abac8 |
children | 2219b0ed8754 |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 1993-2020 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
1 | 25 |
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26 #if ! defined (octave_pt_const_h) |
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27 #define octave_pt_const_h 1 |
1 | 28 |
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29 #include "octave-config.h" |
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30 |
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31 #include <iosfwd> |
1728 | 32 #include <string> |
33 | |
2086 | 34 class octave_value_list; |
2124 | 35 |
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36 #include "error.h" |
2390 | 37 #include "ov.h" |
7336 | 38 #include "pt-bp.h" |
39 #include "pt-exp.h" | |
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40 #include "pt-walk.h" |
581 | 41 |
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42 namespace octave |
1 | 43 { |
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44 class symbol_scope; |
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45 class tree_evaluator; |
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46 |
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47 class tree_constant : public tree_expression |
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48 { |
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49 public: |
620 | 50 |
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51 tree_constant (int l = -1, int c = -1) |
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52 : tree_expression (l, c), m_value (), m_orig_text () |
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53 { } |
1 | 54 |
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55 tree_constant (const octave_value& v, int l = -1, int c = -1) |
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56 : tree_expression (l, c), m_value (v), m_orig_text () |
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57 { } |
5861 | 58 |
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59 tree_constant (const octave_value& v, const std::string& ot, |
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60 int l = -1, int c = -1) |
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61 : tree_expression (l, c), m_value (v), m_orig_text (ot) |
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62 { } |
4267 | 63 |
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64 // No copying! |
620 | 65 |
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66 tree_constant (const tree_constant&) = delete; |
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67 |
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68 tree_constant& operator = (const tree_constant&) = delete; |
620 | 69 |
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70 ~tree_constant (void) = default; |
4267 | 71 |
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72 bool has_magic_end (void) const { return false; } |
2409 | 73 |
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74 // Type. It would be nice to eliminate the need for this. |
1199 | 75 |
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76 bool is_constant (void) const { return true; } |
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77 |
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78 void maybe_mutate (void) { m_value.maybe_mutate (); } |
2942 | 79 |
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80 void print (std::ostream& os, bool pr_as_read_syntax = false, |
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81 bool pr_orig_txt = true); |
1 | 82 |
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83 void print_raw (std::ostream& os, bool pr_as_read_syntax = false, |
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84 bool pr_orig_txt = true); |
2971 | 85 |
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86 bool rvalue_ok (void) const { return true; } |
2971 | 87 |
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88 octave_value value (void) { return m_value; } |
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90 tree_expression * dup (symbol_scope& scope) const; |
620 | 91 |
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92 void accept (tree_walker& tw) |
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93 { |
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94 tw.visit_constant (*this); |
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95 } |
620 | 96 |
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97 // Store the original text corresponding to this constant for later |
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98 // pretty printing. |
2124 | 99 |
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100 void stash_original_text (const std::string& s) { m_orig_text = s; } |
747 | 101 |
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102 std::string original_text (void) const { return m_orig_text; } |
620 | 103 |
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104 octave_value evaluate (tree_evaluator&, int nargout = 1) |
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105 { |
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106 if (nargout > 1) |
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107 error ("invalid number of output arguments for constant expression"); |
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108 |
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109 return value (); |
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110 } |
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111 |
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112 octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1) |
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113 { |
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114 return ovl (evaluate (tw, nargout)); |
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115 } |
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116 |
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117 private: |
747 | 118 |
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119 // The actual value that this constant refers to. |
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120 octave_value m_value; |
2988 | 121 |
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122 // The original text form of this constant. |
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123 std::string m_orig_text; |
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124 }; |
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125 } |
2988 | 126 |
1 | 127 #endif |