1/*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6=============================================================================*/
7#if !defined(BOOST_SPIRIT_WHAT_APRIL_21_2007_0732AM)
8#define BOOST_SPIRIT_WHAT_APRIL_21_2007_0732AM
9
10#if defined(_MSC_VER)
11#pragma once
12#endif
13
14#include <boost/mpl/assert.hpp>
15#include <boost/spirit/home/support/info.hpp>
16#include <boost/spirit/home/qi/meta_compiler.hpp>
17
18namespace boost { namespace spirit { namespace qi
19{
20 template <typename Expr>
21 inline info what(Expr const& expr)
22 {
23 // Report invalid expression error as early as possible.
24 // If you got an error_expr_is_not_convertible_to_a_parser
25 // error message here, then the expression (expr) is not a
26 // valid spirit qi expression.
27 BOOST_SPIRIT_ASSERT_MATCH(qi::domain, Expr);
28 return compile<qi::domain>(expr).what(unused);
29 }
30}}}
31
32#endif
33
34

source code of boost/libs/spirit/include/boost/spirit/home/qi/what.hpp