Mercurial > octave
view libinterp/parse-tree/pt-colon.h @ 33309:d422992b5483
refactor position tracking in the parser
This change replaces direct source line and column tracking in the
tree_* classes with the beginning and ending positions in tokens
created by the lexer. All line and column arguments for tree_*
constructors have been removed. More tree_* classes have been
modified to store tokens that are part of the syntax but not necessary
for evaluation.
Affected files: cdef-class.cc, ov-fcn.cc, ov-fcn.h, ov-usr-fcn.cc,
ov-usr-fcn.h, bp-table.cc, oct-parse.yy, parse.h, pt-arg-list.cc,
pt-arg-list.h, pt-args-block.h, pt-array-list.h, pt-assign.cc,
pt-assign.h, pt-binop.cc, pt-binop.h, pt-cbinop.cc, pt-cbinop.h,
pt-cell.cc, pt-cell.h, pt-classdef.cc, pt-classdef.h, pt-cmd.h,
pt-colon.cc, pt-colon.h, pt-const.cc, pt-const.h, pt-decl.cc,
pt-decl.h, pt-eval.cc, pt-except.h, pt-exp.h, pt-fcn-handle.cc,
pt-fcn-handle.h, pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.h, pt-loop.h,
pt-mat.cc, pt-mat.h, pt-misc.h, pt-select.h, pt-spmd.h, pt-stmt.cc,
pt-stmt.h, pt-unop.cc, pt-unop.h, pt.cc, and pt.h.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Thu, 04 Apr 2024 00:58:56 -0400 |
parents | 70b7f1c285c7 |
children |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2024 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" OCTAVE_BEGIN_NAMESPACE(octave) class symbol_scope; // Colon expressions. class tree_colon_expression : public tree_expression { public: tree_colon_expression (tree_expression *base, const token& colon_1_tok, tree_expression *limit) : m_base (base), m_colon_1_tok (colon_1_tok), m_limit (limit) { } tree_colon_expression (tree_expression *base, const token& colon_1_tok, tree_expression *increment, const token& colon_2_tok, tree_expression *limit) : m_base (base), m_colon_1_tok (colon_1_tok), m_increment (increment), m_colon_2_tok (colon_2_tok), m_limit (limit) { } OCTAVE_DISABLE_COPY_MOVE (tree_colon_expression) ~tree_colon_expression () { if (! m_save_base) delete m_base; delete m_limit; delete m_increment; } filepos beg_pos () const { return m_base->beg_pos (); } filepos end_pos () const { return m_limit->end_pos (); } void preserve_base () { m_save_base = true; } bool rvalue_ok () const { return true; } void eval_error (const std::string& s) const; tree_expression * base () { return m_base; } tree_expression * limit () { return m_limit; } tree_expression * increment () { return m_increment; } tree_expression * dup (symbol_scope& scope) const; bool is_colon_expression () 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; token m_colon_1_tok; tree_expression *m_increment {nullptr}; token m_colon_2_tok; tree_expression *m_limit; bool m_save_base {false}; }; OCTAVE_END_NAMESPACE(octave) #endif