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File: lazy.hpp
/*============================================================================= Copyright (c) 2001-2011 Joel de Guzman 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) ==============================================================================*/ #if !defined(BOOST_SPIRIT_LAZY_NOVEMBER_04_2008_1157AM) #define BOOST_SPIRIT_LAZY_NOVEMBER_04_2008_1157AM #if defined(_MSC_VER) #pragma once #endif #include <boost/spirit/home/support/modify.hpp> #include <boost/spirit/home/support/detail/is_spirit_tag.hpp> #include <boost/proto/traits.hpp> namespace boost { namespace phoenix { template <typename Expr> struct actor; }} namespace boost { namespace spirit { template <typename Eval> typename proto::terminal<phoenix::actor<Eval> >::type lazy(phoenix::actor<Eval> const& f) { return proto::terminal<phoenix::actor<Eval> >::type::make(f); } namespace tag { struct lazy_eval { BOOST_SPIRIT_IS_TAG() }; } template <typename Domain> struct is_modifier_directive<Domain, tag::lazy_eval> : mpl::true_ {}; }} #endif