1 // Copyright (c) 2001-2011 Hartmut Kaiser 2 // 3 // Distributed under the Boost Software License, Version 1.0. (See accompanying 4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 5 6 #if !defined(BOOST_SPIRIT_WHAT_MAY_04_2007_0116PM) 7 #define BOOST_SPIRIT_WHAT_MAY_04_2007_0116PM 8 9 #if defined(_MSC_VER) 10 #pragma once 11 #endif 12 13 #include <boost/mpl/assert.hpp> 14 #include <boost/spirit/home/support/info.hpp> 15 #include <boost/spirit/home/karma/meta_compiler.hpp> 16 17 namespace boost { namespace spirit { namespace karma 18 { 19 template <typename Expr> what(Expr const & xpr)20 inline info what(Expr const& xpr) 21 { 22 // Report invalid expression error as early as possible. 23 // If you got an error_invalid_expression 24 // error message here, then the expression (expr) is not a 25 // valid spirit karma expression. 26 BOOST_SPIRIT_ASSERT_MATCH(karma::domain, Expr); 27 return compile<karma::domain>(xpr).what(unused); 28 } 29 30 }}} 31 32 #endif 33 34