Re: [boost] Boost1_58_0_b1_rc2 is available for testing

Marcel Raad writes:

Unfortunately I found a new problem in Boost.Optional. I get weird compile errors in one project, both with MSVC12 and MSVC14: error C3083: ' ?? A0x6071e18f': the symbol to the left of a '::' must be a type

for a line declaring a member function with a boost::optional parameter with a default value of boost::none.

BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE

fixes the problem.

I've finally been able to reproduce the problem. It occurs only if is in the precompiled headers.