apply_operation.hpp

//
// Copyright 2005-2007 Adobe Systems Incorporated
//
// Distributed under 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_GIL_EXTENSION_DYNAMIC_IMAGE_APPLY_OPERATION_HPP
#define BOOST_GIL_EXTENSION_DYNAMIC_IMAGE_APPLY_OPERATION_HPP

#include <boost/gil/detail/mp11.hpp>

#include <boost/variant2/variant.hpp>

namespace boost { namespace gil {

template <typename ...Types, typename UnaryOp>
BOOST_FORCEINLINE
auto apply_operation(variant2::variant<Types...>& arg, UnaryOp op)
#if defined(BOOST_NO_CXX14_DECLTYPE_AUTO) || defined(BOOST_NO_CXX11_DECLTYPE_N3276)
    -> typename UnaryOp::result_type
#endif
{
    return variant2::visit(op, arg);
}

template <typename ...Types, typename UnaryOp>
BOOST_FORCEINLINE
auto apply_operation(variant2::variant<Types...> const& arg, UnaryOp op)
#if defined(BOOST_NO_CXX14_DECLTYPE_AUTO) || defined(BOOST_NO_CXX11_DECLTYPE_N3276)
    -> typename UnaryOp::result_type
#endif
{
    return variant2::visit(op, arg);
}

template <typename ...Types1, typename ...Types2, typename BinaryOp>
BOOST_FORCEINLINE
auto apply_operation(
    variant2::variant<Types1...> const& arg1,
    variant2::variant<Types2...> const& arg2,
    BinaryOp op)
#if defined(BOOST_NO_CXX14_DECLTYPE_AUTO) || defined(BOOST_NO_CXX11_DECLTYPE_N3276)
    -> typename BinaryOp::result_type
#endif
{
    return variant2::visit(op, arg1, arg2);
}

}}  // namespace boost::gil

#endif