Intel compiler does not compile private forward class declaration in another class

Question

Hi there, I've some problems with intel compiler 11.1.xxx Those problems doesn't appears during compilation with MS CL compiler. And I don't udnerstand what's wrong with the code (external boost library header) I end up with multiple errors:

..\boost/log/attributes/attribute_set.hpp(148): error: declaration is incompatible with constant "bool fConstV" (declared at line 147) template< bool fConstV > friend class iter; ^ detected during: instantiation of class "boost::log_mt::basic_attribute_set [with CharT=char]" at line 252 of "..\boost/log/sources/basic_logger.hpp" instantiation of class "boost::log_mt::sources::basic_logger [with CharT=char, FinalT=boost::log_mt::sources::logger, ThreadingModelT=boost::log_mt::sources::single_thread_model]" at line 738 of "..\boost/log/sources/basic_logger.hpp" instantiation of class "boost::log_mt::sources::basic_composite_logger [with CharT=char, FinalT=boost::log_mt::sources::logger, FeaturesT=boost::mpl::ve ctor0]" at line 787 of "..\boost/log/sources/basic_logger.hpp"

..\boost/log/attributes/named_scope.hpp(146): error: declaration is incompatible with constant "bool fConstV" (declared at line 145) template< bool fConstV > friend class iter; ^ detected during: instantiation of class "boost::log_mt::attributes::basic_named_scope_list [with CharT=char]" at line 364 instantiation of class "boost::log_mt::attributes::basic_named_scope [with CharT=char]" at line 94 of "..\boost/log/formatters/named_scope.hpp" instantiation of class "boost::log_mt::formatters::fmt_named_scope [with CharT=char]" at line 270 of "..\boost/log/formatters/named_scope.hpp"

attributeset.hpp

53)     template< typename CharT >
54)     class basic_attribute_set
55)     {
...
147)        template< bool fConstV > class iter;
148)        template< bool fConstV > friend class iter;
149)        template< bool fConstV >
150)
151)        class iter
152)        {
153)            friend class iter< !fConstV >;
154)            friend class basic_attribute_set< CharT >;
...
...

basiclogger.hpp

786)   class logger :
787)       public basic_composite_logger< char, logger, single_thread_model, mpl::vector0< > >
788)   {
789)       BOOST_LOG_FORWARD_LOGGER_CONSTRUCTORS(logger)
790)   };

Any hints welcome.

Answer 1

maybe at line 148 you want template <bool fConstV> friend class iter<fConstV>;? Though, as iter is declared as a nested class, I don't think you need the friend declaration;