[Boost-bugs] [Boost C++ Libraries] #1734: BOOST_STATIC_WARNING can't be passed a dependent expression

Subject: [Boost-bugs] [Boost C++ Libraries] #1734: BOOST_STATIC_WARNING can't be passed a dependent expression
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-03-30 17:42:39

#1734: BOOST_STATIC_WARNING can't be passed a dependent expression
--------------------------+-------------------------------------------------
 Reporter:  dave          |       Owner:  ramey        
     Type:  Bugs          |      Status:  new          
Milestone:  Boost 1.36.0  |   Component:  serialization
  Version:  Boost 1.35.0  |    Severity:  Problem      
 Keywords:                |  
--------------------------+-------------------------------------------------
 This breaks Boost.Serialization on conforming compilers like Intel/Linux.

 {{{
 #!cpp
 #include "boost/static_warning.hpp"

 template <class T>
 int f()
 {
     BOOST_STATIC_WARNING(T::value);
     return 0;
 }

 struct A{ enum { value = true }; };

 int x = f<A>();
 }}}

 The problem is that there's a missing {{{typename}}} in the code generated
 by the macro:

 {{{
 #!cpp
 template <class T>
 int f()
 {
     struct STATIC_WARNING7 { ::boost::static_warning_impl<(bool)( T::value
 )> ::type* p; void f() { delete p; } };
     // ---------------------^ HERE
     return 0;
 }
 }}}

 I think there are tricks that can help you get around this requirement
 (ask Daniel Wallin what he did in the Parameter library), but in the
 meantime BOOST_STATIC_WARNING should at least be made into a no-op for
 Intel C++.  That is enough to get the library working on one additional
 platform and might even be an acceptable change for 1.35.0

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1734>
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