Mercurial > octave
view libinterp/parse-tree/pt-const.h @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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/* Copyright (C) 1993-2020 The Octave Project Developers See the file COPYRIGHT.md in the top-level directory of this distribution or <https://octave.org/COPYRIGHT.html/>. This file is part of Octave. Octave is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <https://www.gnu.org/licenses/>. */ #if ! defined (octave_pt_const_h) #define octave_pt_const_h 1 #include "octave-config.h" #include <iosfwd> #include <string> class octave_value_list; #include "error.h" #include "ov.h" #include "pt-bp.h" #include "pt-exp.h" #include "pt-walk.h" namespace octave { class symbol_scope; class tree_evaluator; class tree_constant : public tree_expression { public: tree_constant (int l = -1, int c = -1) : tree_expression (l, c), m_value (), m_orig_text () { } tree_constant (const octave_value& v, int l = -1, int c = -1) : tree_expression (l, c), m_value (v), m_orig_text () { } tree_constant (const octave_value& v, const std::string& ot, int l = -1, int c = -1) : tree_expression (l, c), m_value (v), m_orig_text (ot) { } // No copying! tree_constant (const tree_constant&) = delete; tree_constant& operator = (const tree_constant&) = delete; ~tree_constant (void) = default; bool has_magic_end (void) const { return false; } // Type. It would be nice to eliminate the need for this. bool is_constant (void) const { return true; } void maybe_mutate (void) { m_value.maybe_mutate (); } void print (std::ostream& os, bool pr_as_read_syntax = false, bool pr_orig_txt = true); void print_raw (std::ostream& os, bool pr_as_read_syntax = false, bool pr_orig_txt = true); bool rvalue_ok (void) const { return true; } octave_value value (void) { return m_value; } tree_expression * dup (symbol_scope& scope) const; void accept (tree_walker& tw) { tw.visit_constant (*this); } // Store the original text corresponding to this constant for later // pretty printing. void stash_original_text (const std::string& s) { m_orig_text = s; } std::string original_text (void) const { return m_orig_text; } octave_value evaluate (tree_evaluator&, int nargout = 1) { if (nargout > 1) error ("invalid number of output arguments for constant expression"); return value (); } octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1) { return ovl (evaluate (tw, nargout)); } private: // The actual value that this constant refers to. octave_value m_value; // The original text form of this constant. std::string m_orig_text; }; } #endif