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41 lines
1.2 KiB
41 lines
1.2 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Distributed under the Boost Software License, Version 1.0. (See accompanying |
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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==============================================================================*/ |
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#if !defined(BOOST_SPIRIT_LAZY_NOVEMBER_04_2008_1157AM) |
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#define BOOST_SPIRIT_LAZY_NOVEMBER_04_2008_1157AM |
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#if defined(_MSC_VER) |
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#pragma once |
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#endif |
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#include <boost/spirit/include/phoenix_core.hpp> |
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#include <boost/proto/proto.hpp> |
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#include <boost/spirit/home/support/modify.hpp> |
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#include <boost/spirit/home/support/detail/is_spirit_tag.hpp> |
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namespace boost { namespace spirit |
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{ |
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template <typename Eval> |
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typename proto::terminal<phoenix::actor<Eval> >::type |
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lazy(phoenix::actor<Eval> const& f) |
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{ |
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return proto::terminal<phoenix::actor<Eval> >::type::make(f); |
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} |
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namespace tag |
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{ |
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struct lazy_eval |
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{ |
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BOOST_SPIRIT_IS_TAG() |
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}; |
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} |
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template <typename Domain> |
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struct is_modifier_directive<Domain, tag::lazy_eval> |
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: mpl::true_ {}; |
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}} |
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#endif
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