id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
11203,boost::none compile errors with MSVC,raad@…,akrzemi1,"The new boost::none in 1.58 doesn't compile on MSVC when using precomiled headers.

Code to reproduce the problem:

precompiled header stdafx.h:
{{{
#include <boost/optional.hpp>
}}}

s.cpp:
{{{
#include ""stdafx.h""

struct s {
 void f(boost::optional<int> const& = boost::none) {}
};
}}}

On MSVC12, this results in the error message:
{{{
s.cpp(3): error C3083: ' ?? A0x06d21c56': the symbol to the left of a '::' must be a type
}}}

Defining BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE works around the problem, but I haven't found it documented anywhere.",Bugs,closed,Boost 1.60.0,optional,Boost 1.58.0,Problem,fixed,,marci_r@…