id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
5669,Intel compiler failure to compile duration.hpp,Edward Rankin <erankin@…>,viboes,"This ticket is to keep track of the issue first surfaced here: http://comments.gmane.org/gmane.comp.lib.boost.user/68421

and continued here: http://comments.gmane.org/gmane.comp.lib.boost.user/68784

In further discussion with Vicente, it turns out that the Intel Compiler (12.0 and 12.1 beta) for some strange reason requires an additional set of parenthesis around the first operand for the && operator, despite the existence of a set of parenthesis.

Essentially the following snippet won't work,

bool = (
(boost::is_convertible<typename Duration::rep,
typename common_type<typename Duration::rep, Rep2>::type>::value)
&&
(boost::is_convertible<Rep2,
typename common_type<typename Duration::rep, Rep2>::type>::value)
)

but 

bool = (
((boost::is_convertible<typename Duration::rep,
typename common_type<typename Duration::rep, Rep2>::type>::value))
&&
(boost::is_convertible<Rep2,
typename common_type<typename Duration::rep, Rep2>::type>::value)
)
works.

This is almost certainly a bug in the Intel Compiler. I will be seeking additional advice on the dev ML and Intel Premier Support on this.",Bugs,closed,Boost 1.48.0,chrono,Boost 1.47.0,Problem,fixed,,