id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
7675	BOOST_NO_DECLTYPE doesn't imply BOOST_NO_DECLTYPE_N3276 anymore	gromer@…	Marshall Clow	"Here's a simple repro:

{{{
#define BOOST_NO_DECLTYPE

#include <boost/suffix.hpp>

#ifndef BOOST_NO_DECLTYPE_N3276
#error ""BOOST_NO_DECLTYPE should imply BOOST_NO_DECLTYPE_N3276""
#endif
}}}
(I include only suffix.hpp so that the bug reproduces on any compiler; you can include boost/config.hpp instead, if you use a compiler that Boost detects as supporting N3276)

This fails with Boost 1.52.0, but builds with 1.50.0 (I don't have 1.51.0 handy to test, but from context I suspect it fails there too). This is a problem because utility/result_of.hpp, and possibly other Boost code, assumes decltype is permitted if BOOST_NO_DECLTYPE_N3276 is not defined; due to this bug, that code will continue to use decltype even when the user specifies BOOST_NO_DECLTYPE.

I've attached a patch that fixes this specific issue, but note that it may reflect a more general problem with the handling of deprecated config macros.
"	Bugs	closed	To Be Determined	config	Boost 1.52.0	Regression	wontfix		gromer@…