Re: [Boost-users] [fusion/tr1] Include path problem?

From: John Maddock (john_at_[hidden])
Date: 2007-07-23 04:52:43

Joel de Guzman wrote:
> John Maddock wrote:
>> I can reproduce with VC8, I see:
>>
> [snip]
>>
>> and so on.  The boost-root/boost/tr1/tr1 directory should be the
>> *first* include, and boost-root/ the second.
>>
>> As before, including <utility> before the fusion header fixes the
>> errors.
>
> Darned, I must be doing something wrong. Seems the sample Test.cpp
> Kimon posted is not complete? There's no boost-root/boost/tr1/tr1
> include in that Test.cpp at all. Could you please attach a minimal
> cpp file that exhibits the problem?

And to try and help this along a bit more: this is a cyclic include 
dependency problem:

Fusion includes <utility> which picks up the TR1 version, which then tries 
to include fusion (for tuples)....  Normally this does work (honestly!), but 
it's a real pain in the you know where to track down the problem when things 
go wrong.  At present some of the fusion headers simply don't get included 
at all, and I can't figure out why at present :-(

John.