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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
// This file was modified by Oracle on 2015.
// Modifications copyright (c) 2015, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
// 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)
#ifndef BOOST_GEOMETRY_UTIL_TRANSFORM_VARIANT_HPP
#define BOOST_GEOMETRY_UTIL_TRANSFORM_VARIANT_HPP
#include <boost/mpl/transform.hpp>
#include <boost/variant/variant_fwd.hpp>
namespace boost { namespace geometry
{
/*!
\brief Meta-function that takes a Sequence type, an MPL lambda
expression and an optional Inserter and returns a variant type over
the same types as the initial variant type, each transformed using
the lambda expression.
\ingroup utility
\par Example
\code
typedef boost::mpl::vector<int, float, long> types;
typedef transform_variant<types, add_pointer<_> > transformed;
typedef variant<int*, float*, long*> result;
BOOST_MPL_ASSERT(( equal<result, transformed> ));
\endcode
*/
template <typename Sequence, typename Op, typename In = boost::mpl::na>
struct transform_variant:
make_variant_over<
typename boost::mpl::transform<
Sequence,
Op,
In
>::type
>
{};
/*!
\brief Meta-function that takes a boost::variant type and an MPL lambda
expression and returns a variant type over the same types as the
initial variant type, each transformed using the lambda expression.
\ingroup utility
\par Example
\code
typedef variant<int, float, long> variant_type;
typedef transform_variant<variant_type, add_pointer<_> > transformed;
typedef variant<int*, float*, long*> result;
BOOST_MPL_ASSERT(( equal<result, transformed> ));
\endcode
*/
template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Op>
struct transform_variant<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Op, boost::mpl::na> :
make_variant_over<
typename boost::mpl::transform<
typename variant<BOOST_VARIANT_ENUM_PARAMS(T)>::types,
Op
>::type
>
{};
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_UTIL_TRANSFORM_VARIANT_HPP
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