Boost C++ Libraries

boost/gil/extension/dynamic_image/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/variant/apply_visitor.hpp>

#ifdef BOOST_GIL_DOXYGEN_ONLY
#undef BOOST_GIL_REDUCE_CODE_BLOAT
#endif

// Implements apply_operation for variants.
// Optionally performs type reduction.
#ifdef BOOST_GIL_REDUCE_CODE_BLOAT

#include <boost/gil/extension/dynamic_image/reduce.hpp>

#else

namespace boost { namespace gil {

/// \ingroup Variant
/// \brief Invokes a generic mutable operation (represented as a unary function object) on a variant
template <typename Types, typename UnaryOp>
BOOST_FORCEINLINE
auto apply_operation(variant<Types>& arg, UnaryOp op)
#if defined(BOOST_NO_CXX14_DECLTYPE_AUTO) || defined(BOOST_NO_CXX11_DECLTYPE_N3276)
    -> typename UnaryOp::result_type
#endif
{
    return apply_visitor(op, arg);
}

/// \ingroup Variant
/// \brief Invokes a generic constant operation (represented as a unary function object) on a variant
template <typename Types, typename UnaryOp>
BOOST_FORCEINLINE
auto apply_operation(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 apply_visitor(op, arg);
}

/// \ingroup Variant
/// \brief Invokes a generic constant operation (represented as a binary function object) on two variants
template <typename Types1, typename Types2, typename BinaryOp>
BOOST_FORCEINLINE
auto apply_operation(
    variant<Types1> const& arg1,
    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 apply_visitor(
        op, arg1, arg2);
}

}}  // namespace boost::gil

#endif // defined(BOOST_GIL_REDUCE_CODE_BLOAT)

#endif