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 
18 namespace boost { namespace spirit { namespace qi
19 {
20     template <typename Expr>
what(Expr const & 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