[Boost-users] function_base.hpp type-punned pointer warnings

Subject: [Boost-users] function_base.hpp type-punned pointer warnings
From: KSpam (keesling_spam_at_[hidden])
Date: 2011-03-10 11:25:18

I get a ton of warnings (well over 5000 in the code base I am compiling) from 
function_base.hpp when compiling with gcc.

        boost-1.46.0/include/boost/function/function_base.hpp:321: warning: 
dereferencing type-punned pointer will break strict-aliasing rules

        boost-1.46.0/include/boost/function/function_base.hpp:325: warning: 
dereferencing type-punned pointer will break strict-aliasing rules

This has been a known problem for a very long time, and the work around is 
quite simple.  Replace

        reinterpret_cast<functor_type*>(&in_buffer.data)->~Functor();

with

        functor_type* p = reinterpret_cast<functor_type*>(&in_buffer.data);
        p->~Functor();

and replace

        reinterpret_cast<functor_type*>(&out_buffer.data)->~Functor();

with

        functor_type* p = reinterpret_cast<functor_type*>(&out_buffer.data);
        p->~Functor();

Would it be a reasonable request to have this simple patch applied to the 
boost source code?

Respectfully,
Justin