Mercurial > octave-nkf
view src/pt-unop.h @ 2980:cd5ad3fd8049
[project @ 1997-05-16 01:12:13 by jwe]
author | jwe |
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date | Fri, 16 May 1997 01:13:19 +0000 |
parents | |
children | daa1ed1f5462 |
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/* Copyright (C) 1996, 1997 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 2, 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, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #if !defined (octave_tree_unop_h) #define octave_tree_unop_h 1 #if defined (__GNUG__) #pragma interface #endif #include <string> class tree_walker; class octave_value; class octave_value_list; class octave_lvalue; #include "pt-exp.h" // Unary expressions. class tree_unary_expression : public tree_expression { public: tree_unary_expression (int l = -1, int c = -1) : tree_expression (l, c), op (0) { } tree_unary_expression (tree_expression *e, int l = -1, int c = -1) : tree_expression (l, c), op (e) { } ~tree_unary_expression (void) { delete op; } tree_expression *operand (void) { return op; } protected: // The operand for the expression. tree_expression *op; }; // Prefix expressions. class tree_prefix_expression : public tree_unary_expression { public: enum type { unknown, unot, uminus, increment, decrement }; tree_prefix_expression (int l = -1, int c = -1) : tree_unary_expression (l, c), etype (unknown) { } tree_prefix_expression (type t = unknown, tree_expression *e, int l = -1, int c = -1) : tree_unary_expression (e, l, c), etype (t) { } ~tree_prefix_expression (void) { } bool rvalue_ok (void) const { return true; } octave_value rvalue (void); octave_value_list rvalue (int nargou); void eval_error (void); string oper (void) const; void accept (tree_walker& tw); private: // The type of the expression. type etype; }; // Postfix expressions. class tree_postfix_expression : public tree_unary_expression { public: enum type { unknown, hermitian, transpose, increment, decrement }; tree_postfix_expression (int l = -1, int c = -1) : tree_unary_expression (l, c), etype (unknown) { } tree_postfix_expression (type t = unknown, tree_expression *e, int l = -1, int c = -1) : tree_unary_expression (e, l, c), etype (t) { } ~tree_postfix_expression (void) { } bool rvalue_ok (void) const { return true; } octave_value rvalue (void); octave_value_list rvalue (int nargout); void eval_error (void); string oper (void) const; void accept (tree_walker& tw); private: // The type of the expression. type etype; }; #endif /* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: *** */