id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9506	@#ifndef - what's it doing in Boost sources?	walter@…	John Maddock	"Looking at the boost file:

http://www.boost.org/doc/libs/1_55_0b1/boost/type_traits/detail/is_mem_fun_pointer_impl.hpp

towards the end, there are these lines:

@#ifndef BOOST_TT_NO_ELLIPSIS_IN_FUNC_TESTING
template <class R BOOST_PP_COMMA_IF(BOOST_PP_COUNTER)  [...]
struct is_function_ptr_helper<R (*)(BOOST_PP_ENUM_PARA [...]
@#endif

What are the @ characters doing there? I can't find any reference to @ being an allowable character (at least in the C++98 Standard).

The @ characters also appear in is_function_ptr_helper.hpp"	Bugs	closed	To Be Determined	type_traits	Boost 1.54.0	Problem	wontfix