54 lines
1.6 KiB
C++
Executable File
54 lines
1.6 KiB
C++
Executable File
// Copyright (c) 2001-2007 Joel de Guzman
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// Copyright (c) 2001-2008 Hartmut Kaiser
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//
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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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#if !defined(BOOST_SPIRIT_LEX_META_GRAMMAR_MAR_13_2007_0243PM)
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#define BOOST_SPIRIT_LEX_META_GRAMMAR_MAR_13_2007_0243PM
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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#pragma once // MS compatible compilers support #pragma once
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#endif
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#include <boost/spirit/home/support/meta_grammar/grammar.hpp>
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#include <boost/spirit/home/support/meta_grammar/basic_transforms.hpp>
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#include <boost/spirit/home/lex/domain.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/placeholders.hpp>
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namespace boost { namespace spirit { namespace lex
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{
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// Check if Expr is a valid lexer expression
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template <typename Expr, typename Enable = void>
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struct is_valid_expr : mpl::false_ {};
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// Return a suitable transform for the given Expr
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template <typename Expr, typename Enable = void>
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struct expr_transform;
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struct main_meta_grammar
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: meta_grammar::if_transform<
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is_valid_expr<proto::_>(),
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expr_transform<proto::_>
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>
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{
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};
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}}}
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namespace boost { namespace spirit { namespace meta_grammar
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{
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///////////////////////////////////////////////////////////////////////////
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// The spirit lexer domain meta-grammar
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///////////////////////////////////////////////////////////////////////////
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template <>
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struct grammar<lex::domain>
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{
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typedef lex::main_meta_grammar type;
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};
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}}}
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#endif
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