boost/boost/xpressive/proto/compiler/error.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 /// \file error.hpp
   3 /// A special-purpose proto compiler that simply generates an error. Useful for
   4 /// flagging certain constructs as illegal.
   5 //
   6 //  Copyright 2004 Eric Niebler. Distributed under the Boost
   7 //  Software License, Version 1.0. (See accompanying file
   8 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9
  10 #ifndef BOOST_PROTO_COMPILER_ERROR_HPP_EAN_04_01_2005
  11 #define BOOST_PROTO_COMPILER_ERROR_HPP_EAN_04_01_2005
  12
  13 #include <boost/xpressive/proto/proto_fwd.hpp>
  14
  15 namespace boost { namespace proto
  16 {
  17
  18     ///////////////////////////////////////////////////////////////////////////////
  19     // error_compiler
  20     struct error_compiler
  21     {
  22         template<typename Op, typename State, typename Visitor>
  23         struct apply
  24         {
  25             typedef void type;
  26         };
  27     };
  28
  29 }}
  30
  31 #endif