Mercurial > octave
view libinterp/parse-tree/pt-colon.h @ 23435:c452180ab672
begin refactoring parse tree evaluator
* libinterp/parse-tree/pt-tm-const.cc,
libinterp/parse-tree/pt-tm-const.h:
New files, extracted from pt-mat.h and pt-mat.cc.
* libinterp/parse-tree/module.mk: Update.
* interpreter.cc, ov-class.cc, ov-classdef.cc, ov-classdef.h,
ov-fcn-handle.cc, ov-fcn-handle.h, ov-usr-fcn.cc, oct-parse.in.yy,
pt-arg-list.cc, pt-arg-list.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.cc,
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-eval.h, pt-except.cc,
pt-except.h, pt-exp.cc, pt-exp.h, pt-fcn-handle.cc, pt-fcn-handle.h,
pt-funcall.cc, pt-funcall.h, pt-id.cc, pt-id.h, pt-idx.cc, pt-idx.h,
pt-jit.cc, pt-jump.cc, pt-jump.h, pt-loop.cc, pt-loop.h, pt-mat.cc,
pt-mat.h, pt-misc.cc, pt-misc.h, pt-select.cc, pt-select.h,
pt-stmt.cc, pt-stmt.h, pt-unop.cc, pt-unop.h:
Use tree_evaluator class to walk the parse tree instead of rvalue
methods in the parse tree classes. Maintain a stack in the evaluator
class to accumulate results.
Pass pointer to evaluator to function objects and other classes as
needed for evaluation.
This is a work in progress that is not yet complete. The ultimate
goal is to move all evaluation into the tree_evaluator class instead
of spreading that work among many different classes. The global
pointer to the current evaluator should also be eliminated.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 21 Apr 2017 18:07:40 -0400 |
parents | 092078913d54 |
children | d6e81498e7fe |
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/* Copyright (C) 1996-2017 John W. Eaton 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 <http://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; class octave_lvalue; #include "pt-exp.h" #include "pt-walk.h" #include "symtab.h" namespace octave { // Colon expressions. class tree_colon_expression : public tree_expression { public: tree_colon_expression (int l = -1, int c = -1) : tree_expression (l, c), op_base (0), op_limit (0), op_increment (0), save_base (false) { } tree_colon_expression (tree_expression *e, int l = -1, int c = -1) : tree_expression (l, c), op_base (e), op_limit (0), op_increment (0), 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), op_base (bas), op_limit (lim), op_increment (inc), 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 (! save_base) delete op_base; delete op_limit; delete op_increment; } bool has_magic_end (void) const { return ((op_base && op_base->has_magic_end ()) || (op_limit && op_limit->has_magic_end ()) || (op_increment && op_increment->has_magic_end ())); } void preserve_base (void) { save_base = true; } tree_colon_expression *append (tree_expression *t); bool rvalue_ok (void) const { return true; } void eval_error (const std::string& s) const; tree_expression *base (void) { return op_base; } tree_expression *limit (void) { return op_limit; } tree_expression *increment (void) { return op_increment; } int line (void) const; int column (void) const; tree_expression *dup (symbol_table::scope_id scope, symbol_table::context_id context) const; void accept (tree_walker& tw) { tw.visit_colon_expression (*this); } private: // The components of the expression. tree_expression *op_base; tree_expression *op_limit; tree_expression *op_increment; bool save_base; }; } #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) OCTAVE_DEPRECATED ("use 'octave::tree_colon_expression' instead") typedef octave::tree_colon_expression tree_colon_expression; #endif #endif