#ifndef BOOST_LEXER_RUNTIME_ERROR_HPP
#define BOOST_LEXER_RUNTIME_ERROR_HPP
+#include <boost/config.hpp> // for BOOST_SYMBOL_VISIBLE
#include <stdexcept>
namespace boost
{
namespace lexer
{
-class runtime_error : public std::runtime_error
+class BOOST_SYMBOL_VISIBLE runtime_error : public std::runtime_error
{
public:
runtime_error (const std::string &what_arg_) :