Mercurial > octave
view libinterp/parse-tree/pt-colon.h @ 30833:449e26c26b41 stable
new is_colon_expression predicate for parse tree expression objects
* pt-exp.h (is_colon_expression): New virtual function.
* pt-colon.h (is_colon_expression): New function.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 07 Mar 2022 15:02:34 -0500 |
parents | 796f54d4ddbf |
children | e88a07dec498 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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_colon_h) #define octave_pt_colon_h 1 #include "octave-config.h" #include <string> class octave_value; class octave_value_list; #include "pt-exp.h" #include "pt-walk.h" namespace octave { class symbol_scope; // Colon expressions. class tree_colon_expression : public tree_expression { public: tree_colon_expression (int l = -1, int c = -1) : tree_expression (l, c), m_base (nullptr), m_limit (nullptr), m_increment (nullptr), m_save_base (false) { } tree_colon_expression (tree_expression *bas, tree_expression *lim, int l = -1, int c = -1) : tree_expression (l, c), m_base (bas), m_limit (lim), m_increment (nullptr), m_save_base (false) { } tree_colon_expression (tree_expression *bas, tree_expression *lim, tree_expression *inc, int l = -1, int c = -1) : tree_expression (l, c), m_base (bas), m_limit (lim), m_increment (inc), m_save_base (false) { } // No copying! tree_colon_expression (const tree_colon_expression&) = delete; tree_colon_expression& operator = (const tree_colon_expression&) = delete; ~tree_colon_expression (void) { if (! m_save_base) delete m_base; delete m_limit; delete m_increment; } void preserve_base (void) { m_save_base = true; } bool rvalue_ok (void) const { return true; } void eval_error (const std::string& s) const; tree_expression * base (void) { return m_base; } tree_expression * limit (void) { return m_limit; } tree_expression * increment (void) { return m_increment; } tree_expression * dup (symbol_scope& scope) const; bool is_colon_expression (void) const { return true; } octave_value evaluate (tree_evaluator&, int nargout = 1); octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1) { return ovl (evaluate (tw, nargout)); } void accept (tree_walker& tw) { tw.visit_colon_expression (*this); } private: // The components of the expression. tree_expression *m_base; tree_expression *m_limit; tree_expression *m_increment; bool m_save_base; }; } #endif