Mercurial > octave-nkf
view libinterp/corefcn/oct-lvalue.h @ 20283:011a364b4d78
improve compatibility of indexed assignment (bug #43813)
* oct-lvalue.h, oct-lvalue.cc (octave_lvalue::index_type,
octave_lvalue::index_is_empty): New functions.
* pt-assign.cc (tree_multi_assignment::rvalue): For expressions like
[lhs{:}] = fcn (args) with LHS undefined, and in which FCN produces an
output given nargout equal to zero, convert LHS to a one-element cell
array indexed by 1.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 05 Jun 2015 15:51:04 -0400 |
parents | 4197fc428c7d |
children |
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/* Copyright (C) 1996-2015 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_oct_lvalue_h) #define octave_oct_lvalue_h 1 class octave_value; class octave_value_list; #include <string> #include "oct-obj.h" #include "pt-idx.h" #include "symtab.h" class octave_lvalue { public: octave_lvalue (const symbol_table::symbol_reference& s = symbol_table::symbol_reference ()) : sym (s), type (), idx (), nel (1) { } octave_lvalue (const octave_lvalue& vr) : sym (vr.sym), type (vr.type), idx (vr.idx), nel (vr.nel) { } octave_lvalue& operator = (const octave_lvalue& vr) { if (this != &vr) { sym = vr.sym; type = vr.type; idx = vr.idx; nel = vr.nel; } return *this; } ~octave_lvalue (void) { } bool is_black_hole (void) const { return sym.is_black_hole (); } bool is_defined (void) const { return ! is_black_hole () && sym->is_defined (); } bool is_undefined (void) const { return is_black_hole () || sym->is_undefined (); } bool is_map (void) const { return value().is_map (); } void define (const octave_value& v) { sym->assign (v); } void assign (octave_value::assign_op, const octave_value&); void numel (octave_idx_type n) { nel = n; } octave_idx_type numel (void) const { return nel; } void set_index (const std::string& t, const std::list<octave_value_list>& i); void clear_index (void) { type = std::string (); idx.clear (); } std::string index_type (void) const { return type; } bool index_is_empty (void) const; void do_unary_op (octave_value::unary_op op); octave_value value (void) const; private: symbol_table::symbol_reference sym; std::string type; std::list<octave_value_list> idx; octave_idx_type nel; }; #endif