diff -r d8475431bbbb -r 8e85e6bbefdf src/lemon/utility.h --- a/src/lemon/utility.h Sat May 21 21:04:57 2005 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,153 +0,0 @@ -/* -*- C++ -*- - * - * src/lemon/utility.h - Part of LEMON, a generic C++ optimization library - * - * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi - * Kutatocsoport (Egervary Research Group on Combinatorial Optimization, - * EGRES). - * - * Permission to use, modify and distribute this software is granted - * provided that this copyright notice appears in all copies. For - * precise terms see the accompanying LICENSE file. - * - * This software is provided "AS IS" with no warranty of any kind, - * express or implied, and with no claim as to its suitability for any - * purpose. - * - * This file contains a modified version of the enable_if library from BOOST. - * See the appropriate copyright notice below. - */ - -// Boost enable_if library - -// Copyright 2003 © The Trustees of Indiana University. - -// Use, modification, and distribution is subject to the Boost Software -// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at -// http://www.boost.org/LICENSE_1_0.txt) - -// Authors: Jaakko Järvi (jajarvi at osl.iu.edu) -// Jeremiah Willcock (jewillco at osl.iu.edu) -// Andrew Lumsdaine (lums at osl.iu.edu) - - -#ifndef LEMON_UTILITY_H -#define LEMON_UTILITY_H - -namespace lemon -{ - - /// Basic type for defining "tags". A "YES" condition for enable_if. - - /// \todo This should go to a separate "basic_types.h" (or something) - /// file. - struct True { - static const bool value = true; - }; - - /// Basic type for defining "tags". A "NO" condition for enable_if. - struct False { - static const bool value = false; - }; - - template - struct Wrap { - const T &value; - Wrap(const T &t) : value(t) {} - }; - - /**************** dummy class to avoid ambiguity ****************/ - - template struct dummy { dummy(int) {} }; - - /**************** enable_if from BOOST ****************/ - - template - struct enable_if_c { - typedef T type; - }; - - template - struct enable_if_c {}; - - template - struct enable_if : public enable_if_c {}; - - template - struct lazy_enable_if_c { - typedef typename T::type type; - }; - - template - struct lazy_enable_if_c {}; - - template - struct lazy_enable_if : public lazy_enable_if_c {}; - - - template - struct disable_if_c { - typedef T type; - }; - - template - struct disable_if_c {}; - - template - struct disable_if : public disable_if_c {}; - - template - struct lazy_disable_if_c { - typedef typename T::type type; - }; - - template - struct lazy_disable_if_c {}; - - template - struct lazy_disable_if : public lazy_disable_if_c {}; - - // smart referencing - - template - struct SmartReference { - typedef _Type& Type; - }; - - template - struct SmartReference< - _Type, - typename enable_if::type - > { - typedef _Type Type; - }; - - template - struct SmartConstReference { - typedef const _Type& Type; - }; - - template - struct SmartConstReference< - _Type, - typename enable_if::type - > { - typedef const _Type Type; - }; - - template - struct SmartParameter { - typedef _Type& Type; - }; - - template - struct SmartParameter< - _Type, - typename enable_if::type - > { - typedef const _Type& Type; - }; - -} // namespace lemon - -#endif