named_value-fwd.hh

00001 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
00002 
00003 /*
00004  * Copyright (c) 2008, 2009 Ciaran McCreesh
00005  *
00006  * This file is part of the Paludis package manager. Paludis is free software;
00007  * you can redistribute it and/or modify it under the terms of the GNU General
00008  * Public License version 2, as published by the Free Software Foundation.
00009  *
00010  * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
00011  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00012  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
00013  * details.
00014  *
00015  * You should have received a copy of the GNU General Public License along with
00016  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00017  * Place, Suite 330, Boston, MA  02111-1307  USA
00018  */
00019 
00020 #ifndef PALUDIS_GUARD_PALUDIS_UTIL_NAMED_VALUE_FWD_HH
00021 #define PALUDIS_GUARD_PALUDIS_UTIL_NAMED_VALUE_FWD_HH 1
00022 
00023 #include <string>
00024 #include <paludis/util/tribool-fwd.hh>
00025 
00026 namespace paludis
00027 {
00028     template <typename K_, typename V_>
00029     class NamedValue;
00030 
00031     template <typename K_, typename V_>
00032     NamedValue<K_, V_>
00033     value_for(const V_ & v);
00034 
00035     /* Hack: let "foo" work for strings, but ban other magic conversions */
00036     template <typename K_>
00037     NamedValue<K_, std::string>
00038     value_for(const char * const v);
00039 
00040     /* Hack: let indeterminate work for Tribools, but ban other magic conversions */
00041     template <typename K_>
00042     NamedValue<K_, Tribool>
00043     value_for(TriboolIndeterminateValueType);
00044 }
00045 
00046 #endif

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