| /*============================================================================= |
| Copyright (c) 2001-2014 Joel de Guzman |
| Copyright (c) 2013 Agustin Berge |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ==============================================================================*/ |
| #if !defined(BOOST_SPIRIT_X3_SFINAE_MAY_20_2013_0840AM) |
| #define BOOST_SPIRIT_X3_SFINAE_MAY_20_2013_0840AM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| namespace boost { namespace spirit { namespace x3 |
| { |
| template <typename Expr, typename T = void> |
| struct disable_if_substitution_failure |
| { |
| typedef T type; |
| }; |
| template <typename Expr, typename T> |
| struct lazy_disable_if_substitution_failure |
| { |
| typedef typename T::type type; |
| }; |
| }}} |
| |
| #endif |