[boost] [core] Breaking bugfix in scoped enums

Subject: [boost] [core] Breaking bugfix in scoped enums
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2014-06-06 18:41:44

Hi,

While creating tests for scoped enums emulation I've fixed a bug which 
resulted in the enums being convertible to int. This is a potentially breaking 
change, the code like this will now not compile:

 BOOST_SCOPED_ENUM_DECLARE_BEGIN(color)
 {
   red, green, blue
 }
 BOOST_SCOPED_ENUM_DECLARE_END(color)

 void foo(boost::native_type<color>::type col);

 color col = color::blue;
 foo(col);

The call to foo() should be done like this:

 foo(boost::native_value(col));

Previously, the conversion was implicit.