eb5bcb8eaf
The local typedef used for type checking is unreferenced, and causes spurious warning with GCC 4.8. Use an inline std::enable_if return type munging to elide template instantiations for unrelated types. Signed-off-by: Saleem Abdulrasool <compnerd@compnerd.org>
34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
/* vim: set sw=4 sts=4 et foldmethod=syntax : */
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/*
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* Copyright (c) 2008, 2009, 2011 Ciaran McCreesh
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*
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* This file is part of the Paludis package manager. Paludis is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PALUDIS_GUARD_PALUDIS_UTIL_VISITOR_CAST_FWD_HH
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#define PALUDIS_GUARD_PALUDIS_UTIL_VISITOR_CAST_FWD_HH 1
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#include <paludis/util/attributes.hh>
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#include <type_traits>
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namespace paludis
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{
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template <typename To_, typename From_,
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typename = typename std::enable_if<std::is_base_of<From_, To_>::value>::type>
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To_ * visitor_cast(From_ &) PALUDIS_ATTRIBUTE((warn_unused_result));
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}
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#endif
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